Podcasts about qrp labs

GB2RS News Sunday the 7th of July 2024   The news headlines: A revised Direct to Full examination syllabus has been released The RSGB has announced its representative for the 2024 YOTA camp The RSGB British Science Week Time challenge is an opportunity for constructors The new amateur radio licence has now been in effect for a few months and changes to the licence conditions have necessitated revision to the examination syllabus. Tony Kent, G8PBH, who is the RSGB Examinations Standards Committee Chair, has announced that he is pleased to release version 2.0 of the Direct to Full syllabus, including these revisions. Compared to the version in current use, the only section that has seen major changes is Section 1: “Licensing and station identification”. Section 2: “Operating practices and procedures” has seen some minor changes, for example with regard to suffixes. The RSGB will begin examining to version 2.0 of the syllabus on the 1st of October 2024. It will not be taking any bookings for Direct to Full examinations to take place in September. You can find the syllabus on the RSGB website at rsgb.org/direct-to-full The RSGB is pleased to announce that it will be represented at this summer's Youngsters on the Air camp by Rhys Williams, M0WGY / AJ6XD. The event, which is organised by the IARU Region 1 Youth Working Group together with the Czech Radio Club, will be held between the 16th and 23rd of August 2024 in Prague, Czechia. Rhys is currently studying aerospace engineering at Cambridge University and is going on to do a PhD in engineering at Oxford University from September. He says he has found a lot of joy in the building aspect of amateur radio and enjoys contesting with his university amateur radio club. Find out more about Rhys and this inspirational annual YOTA camp on the RSGB website at rsgb.org/yota-camp Are you looking for your next construction challenge? Then the RSGB British Science Week Time challenge could be for you. The task is to provide a method of either measuring the frequency of a radio frequency source or signal or providing a time reference to a radio operator or radio system. You must use readily available components, materials or other resources. The activity is open to all ages and is divided into three categories: under 18 or still in school; under 21 or an undergraduate up to the age of 23; and a category with no age restriction. You can enter as an individual or as a group. The winner of each category will win a prize of £150 with the winners being announced at this year's RSGB Convention in October. The deadline for entries is the 1st of September. You can find out more, including how to enter, by visiting rsgb.org/bsw and selecting the ‘Time-related challenge' link under the BSW24 header. Don't forget you can get involved in the new GR2HQ Challenge next weekend, the 13th and 14th of July, as part of the IARU HF World Championship contest. You can take part as individuals but also benefit your club, so why not encourage your club members to take part whether they are regular contesters or not? During the contest, Headquarters Stations represent their countries and the RSGB's station GR2HQ will be run by a network of about a dozen stations around the UK and islands. You will be able to submit your log, including QSOs with GR2HQ, to the RSGB contest robot for the GR2HQ Challenge. If you include your club or group name when you submit your log, each QSO with GR2HQ will count towards an aggregate score for your club or team. You can read more in the June RadCom feature on the GR2HQ Challenge and you can see the rules on the RSGB website at thersgb.org/go/gr2hq TX Factor has released its latest episode in which there is a look at the IC-R15 communications receiver, the latest offering from Icom. Bob, G0FGX and Mike, G1IAR discuss how best to configure the Anytone BT-01 Bluetooth microphone with the Anytone AT-D578, which will be a boon for mobile operating. Finally, there is the second part of a feature on operating via the QO-100 satellite with the Groundstation 2 from DX Patrol. Watch this and previous episodes on the TX Factor website at txfactor.co.uk or on its YouTube channel. A reminder that the next RSGB Tonight@8 webinar is tomorrow, Monday the 8th of July when Hans Summers, G0UPL from QRP Labs will give a presentation on the QMX+ multi-mode 160 to 6m transceiver kit design and features. This is a great opportunity to find out more and ask questions live on the night. You can watch on the RSGB YouTube channel or special BATC channel. Find out more about the webinar on the RSGB website at rsgb.org/webinars  And now for details of rallies and events Barford Radio Rally is taking place today, the 7th, at Barford Village Hall and Green, Norwich, NR9 4AB. The doors open at 9 am for visitors. The event features trade stands, car boot sales, bring and buy, a charity raffle, repeater groups, catering and free car parking. Entry is £2.50 per person but under 16s will be admitted free of charge. To read more about the event visit norfolkamateurradio.org or email David, G7URP via radio@dcpmicro.com The Cornish Radio Amateur Club Rally is also taking place today, the 7th, at Penair School, Truro, Cornwall, TR1 1TN. The doors open at 10.30 am and admission costs £3. Traders bring and buy, club stalls, car parking and catering are all available on-site. Contact Ken, G0FIC on 01209 821073 for more information. Cambridge Repeater Group Rally will take place next Sunday the 14th, at Foxton Village Hall, Hardman Road, Foxton, Cambridgeshire, CB22 6RN. The doors open at 9.30 am for visitors and at 7.30 am for traders. The event features a car boot sale, talk-in, trade stands, clubs and a bring-and-buy area. A free marshalled car park and burger van will be available on site. For more information visit cambridgerepeaters.net and click on the Rally tab. Also on Sunday the 14th, the Lincoln Short Wave Club Summer Rally is taking place at Rasen Festival Hall, Caistor Road, LN8 3HT. The doors open at 10 am and entry will cost £3. Hot refreshments and ample free car parking will be available. More information, including contact details, is available via tinyurl.com/LSWC2024 The McMichael Radio and Electronics Rally and Car Boot Sale is also taking place on Sunday the 14th of July. The venue will be Reading Rugby Club, Holme Park, Sonning Lane, Reading, RG4 6ST. The doors open at 9 am for visitors and at 8 am for traders. Refreshments and ample parking will be available. For more information visit mcmichaelrally.org.uk  Now the Special Event news Special callsign OR100LGE is used by members of Liege Radio Club, ON5VL throughout 2024 to celebrate the Club's 100th anniversary. Look for activity on the 160 to 6m bands using CW, SSB, FT8 and FT4. QSL via Logbook of the World, eQSL or via ON6YH. QSOs will also be uploaded to Club Log. SK100FRK is the special callsign in use by the Falu Radio Club, SK4AO to celebrate the 100th anniversary since it was founded. The station will be active until the end of 2024 and details of an available award can be found at QRZ.com  Now the DX news Bo, OZ1DJJ is active as OX3LX from Greenland until the 16th of July. He is QRV on the 6 and 4m bands, as well as on the HF bands, often using FT8. QSL via OZ0J. Zsolt, HA8PX is active as S79/HA8PX from Mahe, AF-024, in the Seychelles until Wednesday the 10th of July. He operates mainly CW, but also some SSB and FT8, on various bands. QSL via Club Log's OQRS, or directly.  Now the contest news VHF National Field Day started at 1400 UTC on Saturday the 6th of July and ends at 1400UTC today, Sunday the 7th of July. Using all modes on the VHF bands, the exchange is signal report, serial number and locator. Today, the 7th, the 3rd 144MHz Backpackers Contest runs from 1100 to 1500 UTC. Using all modes on the 2m band, the exchange is signal report, serial number and locator. On Tuesday the 9th, the 432MHz FM Activity Contest runs from 1800 to 1855UTC. Using FM on the 70cm band, the exchange is signal report, serial number and locator. Also on Tuesday the 9th, the 432MHz UK Activity Contest runs from 1900 to 2130UTC. Using all modes on the 70cm band, the exchange is signal report, serial number and locator. On Wednesday the 10th, the 432MHz FT8 Activity four-hour Contest runs from 1700 to 2100UTC. Using FT8 on the 70cm band, the exchange is report and four-character locator. Also on Wednesday the 10th, the 432MHz FT8 Activity two-hour Contest runs from 1900 to 2100UTC. Using FT8 on the 70cm band, the exchange is report and four-character locator. Stations entering the four-hour contest may also enter the two-hour contest. On Wednesday the 10th, the 80m Club Championship Contest runs from 1900 to 2030UTC. Using SSB on the 80m band, the exchange is signal report and serial number. On Thursday the 11th, the 50MHz UK Activity Contest runs from 1900 to 2130UTC. Using all modes on the 6m band, the exchange is signal report, serial number and locator. The IARU HF World Championship starts at 1200UTC on Saturday the 13th of July and ends at 1200UTC on Sunday the 14th of July. Using CW and SSB on the 160 to 10m bands, where contests are permitted, the exchange is signal report and ITU zone. On Sunday the 14th, the UK Microwave Group 24, 47 and 76GHz Contest runs from 0900 to 1700UTC. Using all modes on 24, 47 and 76GHz frequencies, the exchange is signal report, serial number and locator. Now the radio propagation report, compiled by G0KYA, G3YLA, and G4BAO on Thursday the 4th of July 2024 After a rough spot last weekend, the Sun has since behaved itself, allowing HF propagation to get back to normal. To recap, the Kp index hit 7.67 on Friday the 28th of June, thanks to incoming plasma from a coronal mass ejection. For a time, it looked like we might have a repeat performance of the 10th of May when the Kp index hit 9 and there was a visible aurora across the UK. This time around, however, conditions calmed down again and 24 hours later the Kp index was back to 2.33. Since then, the Sun has remained calm with only two M-class and zero X-class flares, and the Kp index is back in the 1 to 3 range. This means that the ionosphere has had a chance to build up and we have been seeing MUFs over a 3,000km path exceeding 21MHz and often reaching 24MHz. That's pretty good considering we are in the Summer HF doldrums. An analysis of the Sun's active sunspot regions shows that two are growing, five are declining and one is stable. WSPRNet.org shows that signals have been getting to the UK from Australia, New Zealand, Japan and the Far East on the 15m band, while 28MHz is still mainly open to short-hop Sporadic-E contacts across Europe. The solar flux index has declined over the past week and was sitting at 167 on Thursday the 4th of July. Next week, NOAA predicts it will remain around the 170 mark, with quiet geomagnetic conditions. However, solar flares and coronal mass ejections remain hard to predict so keep an eye on Solarham.com and Propquest.co.uk for a real-time view of solar and geomagnetic conditions. And now the VHF and up propagation news from G3YLA and G4BAO The weather sequence to the end of next week is much like an autumn pattern in that the story is all about areas of low pressure, showers and weather fronts. None of this suggests that Tropo will be a feature of the weather. In fact, high-pressure systems simply do not appear on the charts at all. We can leave rain scatter on the list and, since it is technically summer, or meant to be, there is a lot of energy in any showers. Indeed, some may be heavy and thundery and are probably good rain-scatter candidates. Meteor scatter, in the absence of major showers, is most likely around the dawn period when random meteors tend to be more prevalent. The solar conditions continue to offer much variability and it is always worth checking for elevated Kp index values, which can be a signal for aurora to occur. As a general guide check the bands when Kp reaches 5 or higher. The Sporadic-E season continues, although recently there have been some higher-than-ideal Kp indices, which unlike for aurora need to be at lower values, say below a Kp index of 3, for ideal Sporadic-E conditions. The other ingredient that tends to promote Sporadic-E is the presence of jet streams in the upper atmosphere around 10 to 15km up. It is believed that these can generate atmospheric gravity waves that can propagate up to the E region at 110km where they become part of the process for making Sporadic-E. This unsettled autumn-like weather is providing plenty of jet streams, so it continues to be worth checking for Sporadic-E. A quick look at the upper air pattern suggests that paths towards Scandinavia and the Baltic may be productive, and perhaps to Iberia later next week. Moon declination is close to maximum positive this coming weekend so Moon peak elevation will be high. Moon apogee is on Friday the 12th so EME path losses continue to increase. 144MHz sky noise is low all week.  And that's all from the propagation team this week.

GB2RS News Sunday the 30th of June 2024   The news headlines: The IARU HF Championship is coming up Learn about the QMX+ transceiver at the next RSGB Tonight@8 webinar The Examinations Standards Committee has published its annual report   The IARU HF Championship contest will be held between the 13th and 14th of July and there is a great opportunity for you to get involved in a different way this year. During the contest, ‘Headquarters Stations' represent their countries and the RSGB's station GR2HQ will be run by a network of about a dozen stations around the UK and islands. This year, the RSGB Contest Committee has introduced a new challenge to encourage individual stations to work the GR2HQ station on each band-mode slot. You will be able to submit your log, including QSOs with GR2HQ, to the RSGB contest robot for the GR2HQ Challenge. If you include your club or group name when you submit your log, each QSO with GR2HQ will count towards an aggregate score for your club or team. There will be two results tables, one for individuals taking part and one for clubs, so your QSOs can contribute to both! Why not encourage your club members to take part in this special challenge whether they are regular contesters or not. By contacting the GR2HQ station you'll also help the RSGB's position in the contest – last year the RSGB came third and the Society would love to improve on that result. You can read more in the June RadCom feature on the GR2HQ Challenge and you can see the rules on the RSGB website at thersgb.org/go/gr2hq The next RSGB Tonight@8 webinar is on Monday the 8th of July when Hans Summers, G0UPL from QRP Labs will give a presentation on the QMX+ multi-mode 160 to 6m transceiver kit design and features. This is a great opportunity to find out more and ask questions live on the night. You can watch on the RSGB YouTube channel or special BATC channel. Find out more about the webinar on the RSGB website at rsgb.org/webinars The Examinations Standards Committee has published its annual report, relating to activities in 2023. Whilst the report shows that in 2023 there were fewer candidates across all licence levels, the number of people taking exams so far in 2024 has increased significantly. Another item in the report relates to the preparations that are being made to release the bank of questions for the Full licence exam. The ESC Chair, Tony Kent, G8PBH says that it has long been recognised that a review of the question bank, particularly at Full level, is well overdue and has been delayed multiple times by things such as the need to revise the syllabus for EMF and the new licence changes. Reviewing the question bank is the next priority of the ESC and the Exams and Syllabus Review Group and will begin on the 1st of September when Syllabus 1.6 is up and running. The ESC and ESRG believe it is better that this review is conducted before the bank is published as this should reduce the workload on the community and the exams teams in making and responding to queries on questions that may be withdrawn. They are hoping to release the questions in January 2025. To see the full ESC report go to rsgb.org/esc  and click on the minutes, papers and reports tab on the right. The team from hi-impact based on the Wirral is planning its first high-altitude balloon launch of 2024. This time, working alongside staff and pupils from Monks Coppenhall Academy near Crewe, they will launch at 11am on Wednesday the 3rd of July 2024, from their usual location in Cilcewydd, near Welshpool in Wales. They will be running a HABduino and encourage all amateurs and short-wave listeners to upload telemetry to SondeHub. The frequency will be 434.650MHz USB, transmitting 50 Baud RTTY, 425Hz Shift and using 7N1 data format. The callsign is MONKS_HAB. Updates will be posted on hi-impact's Facebook page and on X @hiimpactconsult This year, the Churches and Chapels on the Air event will take place on Saturday the 14th of September. If you are planning to put your church or chapel on the air, please email John, G3XYF via jhwresdell@gmail.com and he will add you to the list of participants. And finally, don't forget that today, the 30th, is Alexanderson Day. The unique Alexanderson alternator, with the callsign SAQ, is scheduled for two transmissions on 17.2kHz using CW. At 0830UTC, the alternator will be started up and at 0900UTC the first transmission will take place. A second transmission is scheduled for 1200UTC. You can read more about the event and historic transmitter at alexander.n.se   And now for details of rallies and events   Dunstable Downs Radio Club's annual rally is taking place today, the 30th, at Stockwood Park in Luton. As always, there will be plenty of plots available on the day for £10 each. The fee for car parking will be £4 per vehicle for visitors. Both of the usual entrances for traders and visitors remain unchanged. However, the road that runs along part of Newlands Road on the south side of the park is closed so please plan your route accordingly. For more information visit ddrcbootsale.org Burton on Trent Amateur Radio Club Mini Rally and Barbecue is set to take place on Saturday the 6th of July. The venue will be The Barley Mow public house, Burton on Trent, DE5 9AP. Ample car parking will be available, and admission will be free. In addition to all the usual stalls, there will be a live demonstration of the Club's remote access station. For more information phone Barry on 01283 540570 or see the Club's Facebook page. Barford Radio Rally is coming up next Sunday, the 7th, at Barford Village Hall and Green, Barford, Norwich, NR9 4AB. Doors open at 9am for visitors. The event features trade stands, car boot sales, bring and buy, a charity raffle, repeater groups, catering and free car parking. Entry is £2.50 per person but under 16s will be admitted free of charge. To read more about the event visit norfolkamateurradio.org or email David, G7URP via radio@dcpmicro.com Cornish Radio Amateur Club Rally is also taking place next Sunday, the 7th, at Penair School, Truro, Cornwall, TR1 1TN. The doors open at 10.30am and admission will cost £3. There will be traders, bring and buy, club stalls, car parking and catering is available on site. Contact Ken, G0FIC on 01209 821073 for more information.   Now the Special Event news Durham and District Amateur Radio Society is participating as one of the bonus stations in the popular 13 Colonies special event. The special callsign GB13COL has been issued for the occasion and will be active from 1300UTC on the 1st of July to 0400UTC on the 8th of July. The primary focus of the event will be the HF bands, but the station will also be working on VHF and UHF bands, and via satellite, for QSOs using SSB, CW, FM and various digital modes. If you would like to visit the club, or want further information about GB13COL, please contact Ray, G0VLF on 07904196283 or email g0vlf@yahoo.co.uk Special callsign GX4LMR will be operated by The British Railways Amateur Radio Society from the 5th to the 14th of July to commemorate the first amateur tests on a moving railway train in 1924. Operators plan to concentrate on the 40m band, depending on conditions. QSL via the Bureau.       Now the DX news Sylvia, OE5YYN is active as OE20SOTA until the 31st of October to mark the 20th anniversary of Austria joining the Summits on the Air programme. For details of a certificate that is available see QRZ.com A member of the 69th Russian Antarctic Expedition, Igor, RQ8K will be stationed at Progress Station, Antarctica until the end of April 2025. In his spare time, Igor is active as RI1ANE and uses FT8 on the HF bands regularly.   Now the contest news Today, the 30th, the UK Microwave Group 5.7 and 10GHz Contest runs from 0600 to 1800UTC. Using all modes on 5.7 and 10GHz frequencies, the exchange is signal report, serial number and locator. Tomorrow, the 1st, the 80m Club Championship runs from 1900 to 2030UTC. Using CW on the 80m band, the exchange is signal report and serial number. On Tuesday the 2nd, the 144MHz FM Activity Contest runs from 1800 to 1855UTC. Using FM on the 2m band, the exchange is signal report, serial number and locator. Also on Tuesday the 2nd, the 144MHz UK Activity Contest runs from 1900 to 2130UTC. Using all modes on the 2m band, the exchange is signal report, serial number and locator. On Wednesday the 3rd, the 144MHz FT8 Activity four-hour Contest runs from 1700 to 2100UTC. Using FT8 on the 2m band, the exchange is report and four-character locator. Also on Wednesday the 3rd, the 144MHz FT8 Activity two-hour Contest runs from 1900 to 2100UTC. Using FT8 on the 2m band, the exchange is report and four-character locator. Stations entering the four-hour contest may also enter the two-hour contest. VHF National Field Day starts at 1400UTC on Saturday the 6th of July and ends at 1400UTC on Sunday the 7th of July. Using all modes on the VHF bands, the exchange is signal report, serial number and locator. On Sunday the 7th, the 3rd 144MHz Backpackers Contest runs from 1100 to 1500UTC. Using all modes on the 2m band, the exchange is signal report, serial number and locator.       Now the radio propagation report, compiled by G0KYA, G3YLA, and G4BAO on Thursday the 27th of June 2024 We had another lucky week with quite a high solar flux index, low Kp geomagnetic numbers, few solar flares and no coronal mass ejections, or CMEs, of note. In fact, you couldn't ask for better! But is that all about to change? With nine active solar regions on the Sun's surface and the return of old region 3664, now renamed 3723, it would be a brave person to suggest otherwise. So, let's take a closer look at the Sun. Of the nine active regions that are visible, four are classed as stable, one is classed as declining and four are classed as growing. With a solar flux index of 181, there is plenty of UV radiation around. However, we are currently in the summer doldrums so maximum useable frequencies, or MUFs, are lower than they are in the Autumn and Winter. In other words, we are not going to see a return to reliable worldwide DX conditions on the higher bands until mid to late September. There is currently only a 5% chance of a strong X-class solar flare, although a bright coronal mass ejection was observed for a second day off the Sun's west limb. This was directed away from our planet so shouldn't affect us. NOAA predicts that the Kp index could rise due to CME arrivals from an event that left the Sun on the 24th of June. Expect a Kp of 4 or 5, with a reduction in the MUF until the geomagnetic disruption abates. It also predicts that the solar flux index will remain in the region of 190, hopefully with a low Kp index after the ionosphere settles again. MUFs over a 3,000km path are generally between 18 and 23MHz during daylight and around 18MHz at night. This means that for the next month or so we may expect 14MHz to remain open throughout the night.   And now the VHF and up propagation news from G3YLA and G4BAO The current week finishes with a return to unsettled weather and cooler air, after a brief taste of summer, particularly in the south of Britain. There will be lows drifting in from the Atlantic during the coming week, as well as the occasional passing weather front. Although there was some Tropo last week, during the brief period of high pressure, this is unlikely to be repeated in the coming week. Therefore, we have a continuing random chance of some rain scatter, but you will need one of the many online weather radar displays to track the scatter regions down. Since next week also looks windier, you might have to keep one hand on the rotator! Meteor scatter is once again down to random events, which means an early start in the shack to capture the higher rates in the early mornings. The solar conditions continue to keep trying to creep into VHF affairs with a higher Kp index and thoughts of radio aurora, but it's probably not a strong shout. Now to our last item – Sporadic-E. There is still the broad summer Sporadic-E peak, which extends into the first week of September in a good year, so you have plenty of time. It will not always be there but, in a test analysis of Dourbes data in June 2022, 84% of the days reached 10m, with 18% up to 6m and around 10% to 4m or above. This makes it worth using the 10m band to highlight the regions of activity and then check the 6m beacons in case it strengthens to bring in the higher bands. Moon declination goes positive again this coming weekend so Moon peak elevation and window lengths will increase. Perigee was on Thursday the 27th so EME path losses are increasing again. 144MHz sky noise is low at the start of the coming week and moderate later. From Friday afternoon on the 5th of July to midday on Saturday, the Moon and the Sun are very close in the sky, meaning high noise for all but the narrowest beamwidth antennas. And that's all from the propagation team this week.

In this episode, we join  Martin Butler M1MRB, Chris Howard (M0TCH), Martin Rothwell (M0SGL), Frank Howell (K4FMH) and Leslie Butterfields (G0CIB) to discuss the latest Amateur / Ham Radio news. This episode's feature is Ham Radio 2023 Round-Up including Elecraft, ICOM, ACOM, QRP-Labs, Arriona, ELAD SDR and IARU. We would like to thank our monthly and annual subscription donors for keeping the podcast advert free. To donate, please visit - http://www.icqpodcast.com/donate UK Amateur Radio Licence Proposed Changes. ICQPodcast Discusses with RSGB post Ofcom Announcement. Report sheds some light on Icom's amateur radio strategy Satellite Enthusiasts Encouraged to Take the 'LEDSAT' Challenge Edison Research: Motorists Still Love Radio RadioGPT to Be Used at Univ. of Fla. Media Lab

Chris and Elecia talk with Mark Smith (aka SmittyHalibut and N6MTS) about amateur radio, interconnect standards, and podcasting. Mark is a host of the Ham Radio Workbench podcast. His company is Halibut Electronics (electronics.halibut.com). He's been working on Open Headset Interconnect Standard and Satellite Optimized Amateur Radio (SOAR). Find Mark as SmittyHalibut on YouTube, github, and Mastodon. Chris talked about getting into WSPR in 197: Smell the Transistor but we first talked about it in 76: Entropy is For Wimps Chris has spec'd out his intended project at QRP Labs, the QCX+ 5W CW Mini. Transcript

In this episode, Martin M1MRB is joined by Leslie Butterfield G0CIB, Edmund Spicer M0MNG, and Bill Barnes N3JIX to discuss the latest Amateur / Ham Radio news. Colin M6BOY rounds up the news in brief, and this episode’s feature covers interviews from Ham Radio 2018 with RSGB, Elecraft, BHI, SDR Play and QRP Labs. Proposed $2.8 million Manufacturer Fine The Great FT8 Debate Could a New Entry Level Licence Boost VHF/UHF Activity? Easier Access to UK 70.5 MHz Experimental Band Free book SDR for Engineers Radio Ham Astronaut Named as Minister for Science Try Thailand's Amateur / Ham Radio Exams Z6 Prefix is Illegal

One final piece of content from the 2018 Hamvention.  Every year, the QRP Amateur Radio Club International hosts a QRP conference called Four Days in May that proceeds Hamvention.  The event is home to a large collection of amateurs passionate about low power operation and building their own radios. George attended the event on Thursday and was able to capture talks by Hans Summers G0UPL of QRP-Labs fame and Dr. Jack Purdum W8TEE, famous in the BITX40 community.  Hans talks about the development of his smash hit new transceiver kit, the QCX and Jack talks to us about homebrewing. Special thanks to QRP ARCI President Preston Douglas WJ2V for allowing us to record these great talks. If you would like more information about QRP ARCI or are interested in joining, please visit http://www.qrparci.org/ We have launched the all new http://www.HamRadioWorkbench.com/ !  This includes our new Online Store where you can order Ham Radio Workbench projects that are currently in production.  You can also find documentation for previous projects, an archive of our podcast episodes, and a new Blog where George and Jeremy will post articles. Our Website - http://www.hamradioworkbench.com/ Follow us on Twitter - https://twitter.com/hamworkbench Contact us for feedback and ideas - http://hamradioworkbench.com/contact Connect with us on Facebook - https://www.facebook.com/groups/hamradioworkbench/ Save $100 on the Digilent Analog Discovery 2 Package by using code “HamRadioWorkbench2018” in your cart prior to checkout - https://store.digilentinc.com/ham-radio-workbench-bundle/ Save 10% on a PowerFilm Solar 30 Watt foldable solar panel with Anderson Powerpole adapter cable - no code needed!  https://www.amazon.com/dp/B0763QKSXY The giveaway for a free 30 Watt PowerFilm Solar Panel may still be active!  http://bit.ly/WorkbenchPodcast Hans Summers G0UPL QRP-Labs - https://qrp-labs.com/ Hans’ personal site - http://hanssummers.com/ Presentation and thoughts from FDIM - http://www.qrp-labs.com/dayton2018.html Dr. Jack Purdum W8TEE Co-author “Arudino Projects for Amateur Radio” - https://www.amazon.com/Arduino-Projects-Amateur-Radio-Purdum-ebook/dp/B00O2A7I5O The JackAl board for the uBITX - https://ubitx.net/2018/05/21/jackal-is-here/ Jack’s presentation from FDIM - http://traffic.libsyn.com/workbench/W8TEE-FDIM-2018-Homebrewing-Radio-Gear.odp.pdf Adafruit ADABox - https://www.adafruit.com/adabox/ ZUMSpot Digital Voice Radio Hotspot - https://www.hamradio.com/detail.cfm?pid=H0-015993 MMDVM Github - https://github.com/g4klx/MMDVM Pi-Star - https://www.pistar.uk/ Leo Bodnar Mini GPSDO - http://www.leobodnar.com/shop/index.php?main_page=product_info&products_id=301 Time Nuts - http://www.leapsecond.com/time-nuts.htm Uputronics Raspberry Pi uBLOX GPS Module - https://v3.airspy.us/product/upu-rpigps/ KF7IJZ’s Overview of the new Hytera AR482G - the commercial gradio DMR Radio for Amateurs - https://youtu.be/igEXMLJ0QZY Precision Frequency References with Dr. Frank M Howell K4FMH - https://www.hamradioworkbench.com/podcast/precision-frequency-references Airspy R2 with 10MHz frequency Input - https://v3.airspy.us/product/a-airspy/ Airspy Groups.io - https://airspy.groups.io/g/main/topics FlexRadio 6400 - http://www.flexradio.com/amateur-products/flex-6000-signature-series/flex-6400/

Eric Swartz WA6HHQ, co-founder of Elecraft, joins us to guide our understanding of RF receiver performance specifications.  Eric introduces us to common receiver specs such as Sensitivity, Noise Floor, Dynamic Range, Intermod Dynamic Range, Phase Noise, and RMDR.  He tells us what they mean in real-world receiver performance terms, how they are tested, and whether it’s better to have a higher or lower number in each one.  It’s also the final episode before the 2018 Hamvention and George and Jeremy share our plans for our Booth, special offers, and exclusives for show listeners who stop by booth 3104 in Xenia. Show Topic Begins at 1:09:36 Our Website - http://www.hamradioworkbench.com/ Follow us on Twitter - https://twitter.com/hamworkbench Contact us for feedback and ideas - http://hamradioworkbench.com/contact Connect with us on Facebook - https://www.facebook.com/groups/hamradioworkbench/ Hamvention DMR Hotspot - 439.3125 TG 31075 George will be giving a forum presentation - Saturday, May 19 - 2:45 Room 3  - “Quick tips for setting up your workbench, HamRadio Workbench Build Projects” Want to be on the show?  Come to the booth and tell us what’s on your workbench! Project documentation will be indexed and available on this page - http://hamradioworkbench.com/ham-radio-workbench-project-board-index PowerFilm Solar 30Watt Foldable Solar Panel giveaway - http://bit.ly/WorkbenchPodcast We will announce the winners via our company Facebook page on or around June 1. Save $100 on the Digilent Analog Discovery 2 Package by using code “HamRadioWorkbench2018” in your cart prior to checkout - https://store.digilentinc.com/ham-radio-workbench-bundle/ Visit Digilent at booth 3002 QRP ARCI - Four Days in May - http://www.qrparci.org/fdim QRP Labs - https://www.qrp-labs.com/ Arduino Projects for Amateur Radio - https://www.amazon.com/Arduino-Projects-Amateur-Radio-Purdum/dp/0071834052 W6DQ QRZ Page - https://www.qrz.com/db/w6dq Sam Zeloff - Garage Chip Fab https://hackaday.com/2017/02/25/the-fab-lab-next-door-diy-semiconductors/ https://hackaday.com/2018/04/24/first-lithographically-produced-home-made-ic-announced/ https://hackaday.com/2018/05/03/more-details-on-that-first-home-made-lithographically-produced-ic/ Amp Hour Interview with Sam - https://theamphour.com/390-an-interview-with-sam-zeloof/ Sam Zeloff Youtube Channel - https://www.youtube.com/channel/UC7E8-0Ou69hwScPW1_fQApA Bletchley Park - https://bletchleypark.org.uk/ Update on George’s Projects on his blog - http://www.kj6vu.com/ Anker Powerline Cables - https://www.anker.com/products/110/Cables USB In-Line Multimeter - https://www.amazon.com/Eversame-Multimeter-Chargers-Capacity-Banks-Black/dp/B01D9Y6ZFW/ref=sr_1_3?ie=UTF8&qid=1525531260&sr=8-3&keywords=usb+meter Randy K7AGE YouTube channel - https://www.youtube.com/user/K7AGE Eric 4ZIUG QSO Today Podcast - https://www.qsotoday.com/ Jeremy’s Workbench made from IKEA Algot Shelving - https://pbs.twimg.com/media/Db6TKjGUQAAfvQ8.jpg:large IKEA Algot Shelving - https://www.ikea.com/us/en/catalog/categories/departments/bedroom/22798/ IKEA Bekant Desk - https://www.ikea.com/us/en/catalog/products/S09022804/#/S19022808 RF Receiver Specifications Guide from Eric Swartz WA6HHQ Elecraft Mailing List - http://www.elecraft.com/elist.html Sensitivity - How well can the receiver hear weak signals? Minimum Discernible Signals - noise is generated inside the radio from the amplifier stages and how much amplification is available in the receive chain to bring a signal above the radio’s internal noise floor As sensitivity increases, you can degrade dynamic range To measure, start by injecting weak signals until you observe the signal level out of the speaker roughly double in amplitude (3dB) Lower values are better (bigger negative number), allowing you to detect weaker signals Most HF radios are between -125 to -130 with -135 to -138 being on the higher side of performance Noise Floor The internal noise figure generated by the radio with the antenna removed Dynamic Range Strong Signal Handling - how does the radio perform when there are strong signals adjacent to where you are tuned? IMDR3 - Intermodulation Dynamic Range When multiple strong received signals overload the first receiving amplifier in your radio, the signals get clipped When the radio has a broad banded receiver, this clipping begins to act as a mixer and creates intermodulation showing up at different frequencies Additional unwanted signals are created in the receiver when multiple strong signals are present To measure, begin with two signals apart - the difference between the MDS/sensitivity and the level required to set the signal generator to to cover up the weak signal Higher values are better - 90dB range above noise floor is average, mid 90’s to 100 dB is on the higher side of performance Blocking Dynamic Range A strong signal overloading your receiver thereby reducing the gain of the receiver. Receivers can have challenges when a strong signal is physically near the radio To measure, inject a signal until it causes receiver overall gain to drop one DB Higher values are better - typical better than 130dB of BDR, mid 130s to 140s is on the higher side of performance Phase Noise An indication of the quality and “cleanliness” of local oscilator (VFO, or Crystal Master Oscillator) Denotes whether they introduce jitter or noise to the received signal Lower is better Reciprocal Mixing Dynamic Range (RMDR) RMDR is tied to phase noise Impacted by how clean your oscillator is To measure, listen in 500hz bandwidth and measure how strong an injected signal has to be to raise the noise floor on the freq you are tuned to (1-3dB noise floor increase) This ratio is the RMDR Higher values are better - 110-115 dB As multiple signals get closer, the RMDR drops Sherwood Engineering Receiver Comparison List - http://www.sherweng.com/table.html

In this episode, Martin M1MRB is joined by Chris Howard M0TCH, Dan Romanchik KB6NU and Ed Durrant DD5LP to discuss the latest Amateur / Ham Radio news. Colin M6BOY rounds up the news in brief, and this episode’s feature is QRP Labs. We would like to thank our monthly and annual subscription donors for keeping the podcast advert free. To donate, please visit - http://www.icqpodcast.com/donate Imminent Shutdown of Repeater Group BBC Operating Licence Revealed by Ofcom Amateur Radio Recognized in Norwegian Resource Register FM Satellite Launch in November FCC Scraps Telegraph Regulations RadioShack Re-Opens with Local Ham Radio Club Partner Australian Amateur Radio Licences Renewal Reminder RSGB Exam Syllabus Review

Chris and Elecia talk with each other about science fiction, advertising, ham radios, debugging tools, and programming languages. You can buy Embedded.fm t-shirts until May 18, 2017. You can always buy Elecia’s book: Making Embedded Systems. And don’t forget we have a Patreon if you’d like to support the show directly. Some science fiction we mentioned: Seveneves by Neal Stephenson, Nightfall and Last Question by Isaac Asimov, and the All This Time video from Jonathan Coulton. Digilent sent us goodies to review: one Analog Discovery 2 and two Digital Discovery units. So we did, though we didn't cover the high speed adapters and other nifty goodies. Check out Alvaro Prieto’s Troubleshooting tools HDDG talk for some additional information on the devices. For the giveaways, rules are in the show, hit the contact link to enter. Contest ends May 19th. Chris has been doing low-power ham radio contacts (WSPR) using an Ultimate 3S kit from QRP Labs. We talked about WSPR some with Ron Sparks in episode 76: Entropy Is For Wimps Make with Ada competition is back! It start May 15, 2017. We talked the 2016 competition with Fabien Chouteau in episode 158: Programming Is Too Difficult For Humans. Elecia is still fighting with Ubuntu before she can build her robot typist with her NVidia Jetson TX2 board. Philip Freidin sent in Stanford CS department’s reply to the lightning round question of “what language should you learn in the first college course?” Even better, he sent a link to a google spreadsheet showing how many schools answer the question. Elecia was on the Jennylyn Show. (I’ll update with a link to the specific episode on YouTube when it is available.) March Madness ended with PyBoard as the champion, more info on getting your winner’s hat soon.    

As a 2009 QRP ARCI Hall of Fame inductee - Hans Summers, G0UPL,  is an electronic experimenter and amateur radio innovator extraordinaire.  Hans pays careful attention to compact and minimal parts count to achieve the design goals of his homebrew projects. Hans is the owner of QRP Labs joins Eric, 4Z1UG, in a conversation about QRSS slow data transmissions, high altitude balloon transponders, and shares his ham radio and electronic builder story.