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In operating the QMX+ with a non-resonant antenna and a manual tuner, it is unavoidable not to get the 'S' in the display to the right of the frequency from time to time. The 'S' just looks like some

Jeff - you meant C504, right? Not C604?? :-) I can handle replacing C504 and D502, I'm pretty sure. Looks like I can get a C504 from Mouser for $0.29 providing I have the right part number

Yep. I'll keep making them.

Are you still taking new orders? -- 73 Michael N6QP Up in Thin R

Hi Stan I will do as you say. Thank you very much, Luis CU2IJ

Hello Steve, see your original Thread for my answer. 73 Ludwig

Well I just had to request one of these. ?I appreciate you printing the cases and locating the parts for ones that do not have printers. ?That has always been my nemesis of not having many useful

C604 is the easiest to remove and test. ?If that is ok, then it’s most likely one of the three transistors. ?If you have a scope you can look at various points to see what is amiss. ?Without that

Hello Steve, Diagnostics should show PA voltage near 0 when in RX mode or PTT ON only (no key pressed or key "P" pressed). The PA voltage should be high in TX mode (key "T" pressed). It's clear for

Hey (other) Don! About the Group 5 handset: No problem on readability. In fact they are probably a bit more "punchy" :-| Yes, the mic is not operating at full output but I had to reduce mic gain to

Thanks for your help, Stan. I think I'm ready to order some parts and some ChipQuik to deal with IC503. 73, Steve, N2IC

I was kinda counting on seeing that 10x signal! I will take you test sequence and report back. Thanks! -- 73 Karl KI4ZUQ

Yes, IC503 then is probably damaged - it often gets damaged with 'severe' blowing of finals. And without the finals installed, there is no ground reference path for the bottom side of Q507, so you

Hi Luis, You should use the number of turns indicated, and ignore the nanoVNA results. The inductance value is from a theoretical model, the number of turns is what was found to work best in

Hi, all - Is there by any chance a button push to exit from the menu system back to the operational frequency display, i.e., without having to do multiple EXITs to navigate up and out? [I think the

Sure thing.? TeraTerm Setup (this looks long, since I tried to be thorough, but it is simple): Step 0) In order to setup any terminal program, you first need to make the QMX COM port active on your

Hell forum, please your help, I am building my QMX+ V3. On page 30 of the assembly instructions, there is a table were L518 is 268nH with 23 turns on the pink T37-0 core. This one turn less than

I am headed to the post office this afternoon. If you ordered a kit from me (through today) it is getting mailed today. If you ordered a fully assembled mic, I am mailing about half of them today.

Ludwig, I don't mean to hijack this thread, but I am having a similar issue that I have described in another message. Here is the part relevant to Q507: "Now I'm looking at Q507. I ?have read

I've attached QMX to the PC and I see that it is on Port#003 Hub#004