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Frank: ? ? now that sounds like an Idea to try. When I get back home on Wednesday I'll be giving that a go.? ? ? 73, Donald L. Gover, KC9ZMY

Tony: ? ?I'm not using the MFJ keyer, just the Key. In fact if I set the QCX to straight key and use my nanokeyer it works 100% of the time. So I'm kind of stymied.? ? ?73, Donald L. Gover

Jim I strongly suggest not transmitting until the receiver is working. Unplug the key or paddle. On my build I missed on solder connection in the audio section. I found the issue by turning on the

Tom I suggest reading what is in the manual. Yes its honestly a 3 watt rig with 13.5 volts input. If you feed a slightly higher voltage only to the PA stage, you can gain a half s-unit at most. I

This may sound silly, but are you trying to key the QCX keyer with the signal from your MFJ keyer?. May I suggest that you connect your existing key and paddles directly to the QCX keyer input and set

Donald, You could try 1k pullup resistors from the paddle contacts to the +5V power supply. Maybe there is too much resistance to ground somehow. 73 de Frank PA3CNO Op 3 sep. 2018 16:08 schreef Donald

A short in your keyer wire/plug? Dwight C Watson Dwatson4@...

I see a number of topics addressing various issues with the Keyer but after trying all the various solutions I can't seem to solve mine. I have a MFJ-564b that seems to work flawlessly on my Elecraft

The TLC272 is not a rail-to-rail capable op amp and can only supply 10mA. So it's not a full replacement for the TS922, though it may suffice in this application. The TLV272 is rail-to-rail but can

Hi Jim We post 600-800 packages per month. A lot of money! 73 Hans G0UPL http://qrp-labs.com

I think TLC272 should also do the job, except perhaps for the final headphone stage. It's a similarly specced part, and is available in DIP. Regarding the supply voltage, look at the lowermost right

You are correct: the TS922 is now only available in SMD packages. You would either have to find some NOS DIPs or use an SOIC to DIP adapter. The other alternative is to find another suitable part. So

To get the best power output from QCX. --- This email has been checked for viruses by AVG. https://www.avg.com

I've made progress but it still isn't working right. I rewired T1 and reinstalled it. That fixed the loud tone but I caused more problems. I lifted a trace off the board from pin 4 of T1. It appears

There's some great advice in this thread and replacing IC6-9 sounds like a worthwhile mod, but I'm having a bit of trouble sourcing the TS922 in a DIP8 package.? They seem to have been discontinued

Great job on this video again Juddie with that CW switch plunger.? I did the same with mine, but I made my own plunger mod similar to yours.? I am interested now, in your "tilt up" stand that I can

I do not know if it helps, but I have encountered all sorts of resets ,frequency shift and blocking LCD with VFO signal generator transformed into TX WSPR in 28 and 14 Mhz. Now I'm feeding the three

Hi Alan, Academic?? ALL failures are an opportunity to learn and make a product more robust. I am surprised no one has talked about bringing up the power in steps? Measuring things as we go up to full

Hi Glenn, I'm in defence of all Hans views as well. /g/QRPLabs/message/26421 (I keep pointing out his statement that he has never experienced a failure of any prototypes and beyond to

Oops, sorry.? I meant Jim, not Ted? :-) 72 de Gary W0ITT