Thank you all for keeping the information coming. I will tidy up this thread and repost everything in one message on August 19, 2020 Any last minute updates? -- 73, Bernie, VE3FWF (most typos in

Doug do you have all your jumpers installed in the correct positions on the LPF board. Vernon On 2020-08-18 15:18, Doug wrote:

I built a QCX+ 40 m. At first it did not boot but thanks to helpful troubleshooting tips provided by the community and rechecking my solders it suddenly worked out of nowhere. Sometimes it starts

I'm part way through my 40m QCX+ build. Have any additional construction hints been collected in the past few weeks? I'm wondering if there is an "official" construction hints list. The build is

YES! It was a bad connection between the barrel adapter and the PSU. Thank you amazing community

And now the same problem is occuring :( Does it mean theres a loose contact somewhere?

OMG! it suddenly started working!

Just put a piece of wire into the antenna socket and place it near the crystal. Tune around 20Mhz, usually about +4KHz. Sometimes a counter will stop oscillation. Sorry for the wrong link although it

Giulio The builtin test circuit for receive alignment is amazing, don't deprive yourself its enjoyment. The only caution is watching it rescale the lcd display, but it shows a different numeric level.

And remember - trying to measure watts at the FET finals is meaningless as the waveform there is square. Meaningful RF readings can be found only downstream of a properly functioning LC circuit (LPF).

Also the battery was a sealed 12 V AGM battery fully charged

Yes. I tried powering it off a battery and a working power supply. I tried the approach of listening to the oscillator but I didn't hear anything on my SDR but this could also be due to a bad antenna

Hi I found one more problem with my new WSPR build. I have a relay board installed. I have 1-20M, 2-30M, 3-40M, and 4-80M LPF's installed. If I enable 40M, everything works fine. It goes thru the

The suggested links were for the U3s. Look here for QCX. http://www.qrp-labs.com/qcx/qcxtrouble.html#blocks It would help if you could provide feedback on what you find as you follow the steps

Tune up and down the designated freq will yield more QSOs Reguardless of TX power, the RX path is most important Not just QCX but commercial rigs too TIP ... get to know your CW filter After an event

Did you check all the suggestions in the link provided above: http://www.qrp-labs.com/ultimate3/u3trouble.html#squares Did you try another power source?

Ok, great. --- *************************** Roger Hill ***************************

yes that is correct. The dimple on the IC matches the dimple on the board and the manual. So I can verify this is correct.

And the IC is in 'backwards' in the socket, so that it is correctly orientated to the board (forget the dimple)?? Roger G3YTN --- *************************** Roger Hill ***************************

yes I triple checked. All pins are straight. No bent pins