Re: Blue screen of death U3s
By
Roy Edens
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#108344
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Re: Blue screen of death U3s
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.
By
Bruce Akhurst
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#108343
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Re: Battery Protection
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
By
Donald S Brant Jr
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#108342
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Re: QDX 80M Band Sweep Question
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,
By
Wayne KB4DSF
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#108341
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Re: QDX Trifiliar Transformer Question
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
By
Wayne KB4DSF
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#108340
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Re: QDX Trifiliar Transformer Question
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
By
Bojan Naglic
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#108339
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Re: QDX Trifiliar Transformer Question
Yes, normal. Look at the schematic. They are all connected.
-mike/w1mt
By
mike/w1mt
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#108338
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QDX Trifiliar Transformer Question
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
By
Wayne KB4DSF
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#108337
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Re: QDX 80M Band Sweep Question
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
By
Charles W. Powell
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#108336
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Re: D508 in QMX manual h
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
By
Jonathan Burchmore
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#108335
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Re: Blue screen of death U3s
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
By
Bruce Akhurst
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#108334
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Re: QDX 80M Band Sweep Question
Wayne.
It tests the BPFs. Unless your LPFs are very bad they will make no noticeable difference.
73 Alan G4ZFQ
By
Alan G4ZFQ
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#108333
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D508 in QMX manual h
Looking at the photo on page 24 of QMX manual h, I think maybe diode D508 may be pictured in the wrong orientation.
By
Keith Hamilton
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#108332
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Re: accurate time source
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,
By
Lee
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#108331
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Re: QDX 80M Band Sweep Question
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
By
Cliff
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#108330
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Re: QDX 80M Band Sweep Question
Thanks. I'm sure there is one, as well. I'd say this is causing me to pull my hair out, but I'm already bald...HIHI. I may try running this on a pi to see if I get better results.
Wayne
By
Wayne KB4DSF
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#108329
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Re: QDX 80M Band Sweep Question
I've been following the thread on your audio issue. Very strange as obviously the sound card is working and Windows sees it. I'm not a Windows guy, just have a test setup with Win10. Anyway I'm
By
Cliff
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#108328
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Re: accurate time source
DanI have the coffee can version of T-Mobile Home Internet Cellular Modem andrun Meinberg NTP on my machines when using T-Mobile. Thus far, NTP hasbeen golden.? Using Windows NTP services however is
By
Chuck Moore
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#108327
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Re: QDX 80M Band Sweep Question
Awesome. Thanks for the response. I ran RF filter sweeps on all of the bands to see if maybe something was wrong with my LPFs (assuming that's what this tests). All part of my still troubleshooting my
By
Wayne KB4DSF
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#108326
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Re: QDX 80M Band Sweep Question
Yes, it's actually quite good for 80M. Better than mine.
73,
Cliff, AE5ZA
By
Cliff
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#108325
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