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After I sent this it dawned on me to check the 12v supply as well. Sure enough, it's there too. FWIW, I'm powering it off a 20A Astron 13.8v linear power supply and feeding it into my old Heathkit

One last thing, testing CW uses none of the IF and modulator so if it works you can't know if the IF is fine. MUST test using SSB.? Ideal bias for Q20 will have the collector at about 6V (+-1V).? To

R23 change yes and 18 ohms may be too low still. Likely operating point, R21 may be too low. Before you go to band pass filters try one thing... pain to install, Low pass filter between the junction

Sure does, Mark. Now to find where it's coming from. Please check the 12 volt input pin of the Raduino's 7805. See if it is there, too. On my AGC boards I don't have ANY bypassing on the 5 volt feed

Don... I finally had a chance to start looking into this on my ubitx (I'm seeing the same issue). I managed to borrow a scope and putting it on the 5v supply seems to indicate that you're right. I see

CIRCUITBOARD DETAILS. Hello Alan. Thanks for your interest. Attached is a wiring diagram (more useful than another schematic), an underneath view of the circuit board which should help with your

Thank you Allison for the clarification. I read the thread about the mixing problem and understand where the problem is. Maybe I will try to play around with bandpass filters, but this is no priority

Not to beat a dead horse but are there any shipping issues. Last I read was that the backlog was gone. I placed my order last week and have yet to receive a notice that my ubitx has shipped. Thanks

When in use, those rectangles clear up nicely. It's a matter of viewing angle. The pictures were from too straight on to see the display clearly.

And that was the wrong link... Sorry Here is what the link should be: ubitx.net/fix-fix-uneven-tx-output-across-bands/ Marco - KG5PRT

Alan, I think this is what you are looking for. http://ubitx.net/2018/03/29/adding-a-tune-control-that-has-reduced-power-output/ Marco - KG5PRT [email protected]> wrote:

I agree. That would be an excellent fix, Pat. But it shouldn't be occurring. Alan, can you take voltage measurements of Q1? From ground to the base, and from ground to collector when transmitting? It

Hi mike, can you provide a schematic and parts list for power leveling relay fix? 73, Alan

Ambitious. Good luck with the development. I'll be watching with great interest. Thanks for sharing. Pete WK8S

Pat: That is a great idea! 73 Alan

What size beads? And where did you get them? How should they be installed?

Hi Don: When I unplug the AGC board with the audio and +5 volts still attached the feedback remains the same. When I separated the +5V and ground twisted pair and disconnected the ground feedback

I went down that same path and ended up picking off receive-only 12v from R52 and putting that through a VR circuit to get 5v for the agc. This way, you still have cw sidetone during transmit. Just

Someone made a request to order 2 of the jack break out strips I offer for sale via my website www.w0eb.com ( http://www.w0eb.com ) and my ISP (or my email client) deleted the message just as I was

These are great ideas. I saw another post where they used an old cutting board (plastic instead of wood). I'm just getting ready to do my builds (I have both r3 and r4 kits) here soon so these are all