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Kjell, When I'm in a mood for QRPp, I haul out my Zachtek "Flea" transmitter and the ATS-25 general coverage receiver I use with it. It's only 300mw, on 20, 30, and 40m. It doesn't have to be that

Rather than try to add SWR protection circuitry, try protecting the BS170's: https://la3za.blogspot.com/2023/04/3-tips-for-not-blowing-finals-of-qdx.html I also added the zener across L14 for good

Dave http://qrp-labs.com/ultimate3.html Lots linked from that page. 73 Alan G4ZFQ

I am a nubie to the group so be easy. where do i find instructions for the above unit? dave k7da

Ludwig, Am I understanding that you were finding T37-17s to measure 25%+ high when you wound them? And your further work with T37-10s is validating your measurements? I'm working on a QDX HB, with

I once set up a BIOS EPROM to flash SOS on the carry light.? Well actually any message in Morse. Chris, G5CTH

Hans, I know upgrade is easy, I've done that before ;) Believe it or not, my (yes, MY) problem is, that PC I use on daily basis is unable to write USB drives. Can read but cannot write. Unbelievable?

It was a standard routine done back in the Vaudeville days performed by many acts. The 3 Stooges and Abbott and Costello both have famously recorded versions. A true classic!

No... don't worry, it will all come good in a few days! 73 Hans G0UPL http://qrp-labs.com https://www.buymeacoffee.com/g0upl

Should I be worried if order 82084 shipped but 81846 is still just showing as "Complete"? I just want to make sure that mine hasn't slipped through the cracks or something, since I never got any

I'm not clear on what Simon is saying.? In my case, I have the clicks all the time, but they are much worse if there are are other signals in the receive passband. 73, Randy, KS4L

When using Win 10 and 11 I see? receive gain is easily adjustable, usually 50db range with my FT991A? utilized on Digital modes However with QMX and W10 &W11 computers on WSJT-x best I get is 30db

Thanks for posting this!? It's been AGES since I've seen it.? Is 'Niagara Falls' strictly a Three Stooges skit or have other comics done it, too?

Added to the output of the Hyelec PS-28A is a 12 VDC, 3ADC, 50w zener, the NTE 5254AK, mounted on a 3 inch x 5 inch extruded aluminum heatsink. Well, so far, so good. I shouldn't be breaking any more

Steve, Oh, OK then my thought of a U3S defeats your purpose:-) Best of luck! 73 Alan

OK so you have a different problem then I do. My QMX just stops transmiting WSPR after 10 hours or so even though the display still shows the transmission when the time comes. I have noticed this all

Alan, WSPR Transmit only. My idea is to get the QDX to transmit WSPR on a frequency and at a time determined by a microcontroller rather than a computer. This would allow the automation of a multi

Hi Pawel Sorry I don't have any schedule for firmware releases. There are LOADS of things going on here all the time and it's hard to guess from one day to the next, when I might have time for some

The power reduces as the input voltage does - IIRC the ‘raw’ supply runs the last few op amps on RX, the backlight and the PA. The limit is around 7V into the 5V regulator which is more like 7.5

SOTAbeams, a company in the UK, sells a "Milliwatter extreme" that is a 5 watt, 50 Ohm attenuator, with a choice of 10 dB or 17 dB attenuation. The device attenuates the transmission, but bypasses for