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Hello Russ Built radios include a test certificate which shows the PCB revision, firmware version, supply voltage among other things. I just checked yours, it says 12V. Furthermore our default build

Hi I played with this idea I made an 50w amp with no LPFs inside try to use an external switchable LPF that I bought from aliexpress result: No Go :( why? for each band you'll need not only

Hans has stated that if you don’t specify a particular voltage, it’s built for 12V.

5 jan. 2024 kl. 22:02 skrev Russ Hules <kc5cnt@...>: ?Without opening the radio to check the values of the build is there a way of determining the build voltage? The website states it could

Without opening the radio to check the values of the build is there a way of determining the build voltage? The website states it could be built for either 9 or 12 volts and I purchased it as a built

Got the QMX a few weeks ago and it's been working great aside from the known issues. Worked this morning until it didn't. Can broadcast and am seeing normal spots on FT8 around the country, but

Thanks Evan, Seems obvious now you've told me but there are no markings on the board and i didn't think to compare the PCB layouts of the various board revisions. 73 Phil G8DDN

I have a DC-DC buck converter for the 5 volts. I assume the pads under PH3 on the QLG2 board are the ones to use? When using this supply ?do I need to disconnect the jumper used when supplied by the

Hello Lun, I'm curious, now that sweeps look quite better, does it feel like there's any improvement in reception? Regards, YO3GFH op. Adrian

Good question Bruce as there definitely are common features. I have not seen fails attributable to the related problem posted here on the forum. It may be that I have not been looking, or that the

As someone has to ask : Is there any reason to reduce the antenna capacitor to 1nF (or fit a diode)? on the *U3S receiver* which also covers the lower bands and also has a 100nF input cap, FET

Hi Mike, My RF sweeps looked fine while I had no output. They could of used a little bit of tweaking to get things perfect, but were useable. Once I fixed the bad solder joint on T507, the output

Well chaps, finished the build, implemented Hans's newest diode trick, moved the software onto the processor and connected the antenna and there you go.? The QMX immediately started receiving signals

Hi everyone, I end up adding 330pF in parallel with C402, here's my result:

I looked at the PCB traces diagram at page 12 and this should be then the actual schematic for the 80-20m version: So, actually without knowing which combinations of BAND0, BAND1, LPF0, LPF1, LPF2 it

OK! That is great Adrian! 73 JZ KJ4A [email protected]> wrote:

80m and 40m with the antenna. Will try 20m tomorrow, now it's a liitle late for 20 with 5 watts :-) I tried with a dummy load on all bands, and runned all sweeps, they're like before the mod, no

Excellent, Adrian! What band did you use? JZ [email protected]> wrote:

Just finished performing surgery, and BAT85S it is! Made a few QSO's, RX and TX seem to be working fine, no smoke, no worries :-) Regards, YO3GFH op. Adrian

Lun, Jindra, Clearly I have made a mistake. The X0-X3 and Y0 to Y3 connections on the bandpass filter switch IC402 are in the opposite order from what I had thought. Seeing the 220 pf value of C402