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Hi Mike. Since the problem corrects itself when applying 12v to pin 7 of IC7 and doesn't stay fixed, you may have a capacitor issue. C9 (47 nF) connects from pin 5 of IC7 to ground. It may be leaky.

Saw the news, came here to see this. I'm glad my favorite QRP Hall-of-Famer and his family are okay! Having experienced severe quakes in Southern CA as a youngster, (Loma Prieta, Landers etc) I know

Any suggestion please. The QCX+ 200Hz filter has no gain. All the DC voltages and Waveforms are okay up to and including IC7 but the DC voltages on IC8 bias pins are not 2.5v ish but only 0.8v. I

Just woke up and saw the news. It's pretty bad over there. Not only was the magnitude high but it was shallow at around 11 miles down. Unfortunately, the number of persons injured/killed is only going

Hans hope you, family and friends are ok. Also prayers offered for all of Turkey Everett Catlin WA2BHS

Hans, Very thankful you and your family are safe. For those of us who pray we will be doing so for all those affected by this tragedy. 750 km away doesn’t seem like that far away considering the

Hi JP Ooooohhh I forgot that. I must take care of that duty now. I was so happy to see a whole box of 210 beautiful QDX boards in 35 panels of 6, each individually wrapped, that I forgot! 73 Hans

Hans, Hopefully your genius?colleagues were flogged to within an inch of their lives. ?How dare they stop you from taking our money!!! JP KA3BWP

Ian, assuming you have the frequency display set to 7,020,00(0), use the formula: x = (7020000 X 27004000) / measured freq in Hz "x" will then be the required reference frequency in Hz. 73 .. .Ron

Hi all Whilst I have 1,000 more QDX Rev 5 PCBs in manufacturing... today on my return from 2 weeks away, I asked my colleagues to do a complete stock take of everything to see what else I'm low on

If it was transmitting for any length of time with no antenna or dummy load attached, then the three output BS-170 MOSFETs are most likely blown. It is also possible that Q6 and IC3 are bad as well.

Saw the news as well. Terrible for those impacted. Glad to hear your well Hans. -- Allison ------------------ Post online only, please no email.

Thank you Hugh, Tony and all Terrible times indeed. We are all fine here thank you, my QTH is about 750km or so West of the affected area. The devastation on the news channels is severe. 73 Hans G0UPL

Yes indeed. A horrible tragedy. It affects Syria also.

Nice job Levi. Glad you found it. 73…Ron

Thinking of Hans, his family, and his friends and colleagues as I read about the destruction in Turkey. I know everyone on this forum hopes you are safe and wishes you well.

Richard, One of the many past posts referring to this is /g/QRPLabs/topic/96637601#98443 Reading/searching old posts will reveal a lot more. It seems many do not have need to remove

Yesterday I managed to find that I had a short that caused it to always be trying to transmit. I have fixed that and I have successfully completed the alignment procedure. As far as I can tell the

Thank you Willie, I have no antenna analyzer but changing the length of the antenna influences the sound when keying down. Longer=better tone, shorter=worse tone With a resistance of 50Ohm (dummy

HI Ken Thanks for the reply, I've done the track cut adjacent to C41, clearly shown in the assembly manual. I haven't seen any info about the 4-capacitor short Also presumably to get it to transmit