Brian,
T507 is certainly a possible culprit, as is T501. In my case, it sort of just feels like all the would-be transmit power is falling into a hole, which inclines me more to think T501. I have a feeling that I might also wind up having to desolder and rework one or both to get to good at this point.
On the upside, I have some of the 0.33 wire left, and my shipment (a v2) was early enough that they were mistakenly throwing in some 0.60 still as well. OTOH, I imagine 0.33 isn't that hard or expensive to obtain if it comes down to that level of rework.
Actually: when you reworked T507, did you reuse your existing wire, just straightening it out first?
Thanks for sharing your experience. I don't know if it's the same problem at all, but it's certainly an angle to look at!
Michael WD0OM
On Thu, Sep 26, 2024, at 18:02, Brian wrote:
I'm not qualified to give advice (but I will anyway).? #1 is thank you to everyone here helping and posting.? It allowed me to get my QMX+ working!
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My first bug was minor- display was blank.? There was a poor solder joint inside the "pin sandwich" display/front board.? I was able to find it with a bright flashlight.
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The last bug (RX worked great, menus, etc) was (maybe?) similar to yours.? Failing TX due to high SWR into a dummy load- pretty quick too. Different from your experience though- it always TX'ed for a brief time before failing.? I have P/S set to 12V / 250ma to avoid cooking anything, but it still tripped SWR protection on all bands. I fussed and fiddled with T507 and finally threw in the towel.? I removed it and built it over again, being MORE careful to separate the 10-loops from the one-loops.? After that- transmit worked, but I saw the "battery symbol" on the LCD flickering.? YES, I then had to turn the current limit on the P/S up from 250 ma. I haven't even got to the terminal diagnostics, so there may be more tweaks, but at least it is putting power out on all bands now.
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-KN?N
