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OK all. A big plus, but my troubleshooting isn't totally complete, yet. I now can receive and decode! See below for a screen shot. As far as transmit; though, I'm still not there. I can now transmit

Barb, Documentation for Dimension 4 does not indicate whether it is compatible with Windows versions beyond Windows 7 and 8. Do you know if is compatible with Windows 10 and Windows 11? -Steve

I have done some more testing and there is power to pin 5 (V_IN) of the Plug-in PCB #1. However, when a long hold of the left encoder is pushed there is no output on on pin #6 of this board. So for

Thanks Rick. I set the supply to 25mA wholly expecting it would immediately trip at the excess current demand of the QMX. BUT the power supply did not trip nor did the meters move off of the peg. So

It counted up to a 100 , then I just got a blank screen and the QMX crashed

Taking my own advice I just swapped the CPU that had been involved in the problem back into the set.? ? ?After set-up It all works fine so probably only the 5351 was damaged.

I have used the EFuse products in MIL SATCOM power supply boards and they work great.? Depending upon the model they have under/overvoltage lockout, latching or retry on fault and inrush current

Well Charles, I thought I wrote a reply, but I can't find it. I did follow your instructions and found I can adjust the output audio. What I find, though, is I can adjust it to get a full bar graph,

Thanks all. I did look at the schematic when I found continuity all the way around and thought it was all connected, but I needed to make sure. I'm tracking back an issue with my QDX now and am just

Hi, if you measure it outside the board it is fault. If you measure it on-board there should be connection between oll three. Please, see the schematics. 73 Bojan S53DZ

Yes, normal. Look at the schematic. They are all connected. -mike/w1mt

I do apologize for all of the questions I am asking today. I do have another, though. I ran a continuity check on each of the legs of the trifiliar transformer and they all test good. However, I get

Wayne, I have a different radio set up with Windows 10, but I know that the OS sound settings can be very squirrelly.? Look for "Sound" app.? When you plug in your QDX you should be able to see the

In order to make room for L508, D508 is installed with the body on the left side, with the stripe facing down, which is different than any of the other diodes. There is a blurb in the text that

I had a similar (maybe lightning) problem with a QCX+5W.? ?In that case I replaced the Si 5351 A-B-G? several times as well as the QCX demodulator chip (you don't have)? without getting it

Wayne. It tests the BPFs. Unless your LPFs are very bad they will make no noticeable difference. 73 Alan G4ZFQ

Looking at the photo on page 24 of QMX manual h, I think maybe diode D508 may be pictured in the wrong orientation.

Either Meinberg or Dimension 4 will work well for Windows systems, and I highly recommend the use of either one instead of the built-in Windows time sync, which frankly sucks. For Linux folks,

My main ham system is a Pi-400. Works great and no funny issues like Windows. I don't know if you've run fldigi etc. on Linux before, but this HowTo is a very helpful guide to the building and usage