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Hi Ron, one question remains: what is the actual impedance match when you change the PA voltage? Have used the same method but not sure about the actual power level in 50 ohms environment. Were you

Oh and I forgot, ensure that your audio settings from the soundcard are HIGH level. Too low and the QDX rigs won't see enough signal to interpret. That would prevent any TX going out for sure. Max the

Conky. Unrelated to your issue. But Conky is a bit of a time waster. It might look good, but a simple usage of htop command can tell give you a resources used report. Check your USB cable. Many are

Hi Don It does look 5db stronger at 20m without having a resonant mechanism in the way.( the additional separate toroid bodge.) It might be interesting to adjust the sweep starting at 12mhz to

Hello to all, I reinstalled BAP on my Pi4+ and it is tx'ing fine. I haven't managed to sort out Conky yet but that is the plan for the morning along with a try at a fresh install of BAP for the 3B+. I

PP: K7TXA@... (this is my Idaho call and PP address; I used to be W6JHB when residing in CA, but I escaped!) :-) -- Jim / K7TXA Eagle, ID SKCC 10447 BUG 301

John, I made the mod mentioned above on an old 20 meter Classic QCX I use for experimenting. I fed the Emitter of Q6 with a separate variable voltage and left the rest of the radio running at 13.8

Jim, PP address please and thank you. Rhett [email protected]> wrote:

Hi Rhett - it’s yours! PayPal is fine if you can do that. 73, Jim / K7TXA

The attenuator kit has a single bypass button that can be used for receive. Not automatic but usable. 72 Don ve3ids

Hi all, interesting topic / discussion. Coming to the end of 0.7 'unknown' reel of solder that has provided excellent results over several years (it was a big reel!) using a couple of soldering irons

'Morning Dave It shows -7 however I am not sure how that is based. Here's the produced chart: Below is the original on this unit: I'm pretty sure that these displays are meant to be just relative

"KM3D - Harry 5:53am #103985 ( /g/QRPLabs/message/103985 ) ....? ?I also wonder what the output level would be with 7 volts running the radio. I did a few tests as I to set up my 20

Hi Don Sounds like a much simpler solution When you do an RF sweep of 20m what is the level of the sweep in the 14 mhz range... I think the best I got was -12 db with an external toroid and coil Dave

I would like the 17M radio is still available. 72, Rhett KB4HG [email protected]> wrote:

Another nice one: QDX Assembly Manual for PCB Rev 5, Page 4: Beware that a 12V nominal batter will potentially be several volts higher when fully charged. I like beer batter on fish, but I don't like

Upon completion of my QMX (#331) build I found that the sensitivity on 20 meters to be quite poor, about -92 dBm (5.6 microvolts) for a Minimum Discernible Signal. A topic soon appeared on the forum

The 20 meter rig has been sold; awaiting payment on the 30 meter QCX+. The 17 meter radio is still available. -- Jim / K7TXA Eagle, ID SKCC 10447 BUG 301

Here is a low priced attenuator kit. http://www.qrpkits.com/attenuator.html 73 Don ve3ids <chuck.salmon@...> wrote:

John, Another safe and very flexible way to go is a step-attenuator.? This site has some good info on QRPp as well as construction of simple 43dB attenuator in steps of 1dB.