When the LCD displayys a single row of blocks , I took a reading and this is what I get when compared to the manual. This is running off a 12 V PSU

Doug I presume you have your menus done correct assigning each band to band position on the LPF and activating each band. 0 is on the main board and 1 to 5 on the lpf board. Sent from my Samsung

Has anyone done mods to use the 5Watt PA on the lower VHF bands 6 and 2meters? The assembly instructions hint that is may work on those bands. The suggestion of substituting the IR510 for the RD15HVF1

Hi Vernon I just checked again and all the jumpers appear to be correct and all the LPFplug-ins are in the correct position.... The LPF socket on the transmitter can be empty? Correct???

Touching a soldering iron to both sides of each pin might be a good step, but be careful that you do not lift a solder pad. With the CPU and LCD unplugged (and power off) you can use an ohm meter to

Thank you Arv. I had to desolder my right angle header pins that connect to the front panel PCB since I soldered them wrong in the first place and they're not in the best condition right now. Would a

Rahul Sounds more like a problem with the connections between CPU and LCD (LCD failing to get initialized). Arv _._

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