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Thanks John for the tips. It'll be checked after removal. I still doubt the 5 V supply was ever high, but you're right, I don't know that for sure. Reasons I think it's unlikely is that if there was

Hans, I just finished my QMX build, and all is OK after replacing a cracked C526, either by too much heat or careless wire cutters.? But all is good after replacement. I guess lack of AGC means

Hi all, good news - my QMX is up now and we have clean signals on 80/60/40. Only on 30/20 is something faulty. First I thought the LPF is on bad condition but measurements (DMM in diode-test-mode)

Thanks Rick and Paul. I also noticed that Q103 is very close to Q104. I think I'll have to desolder Q103 to move it around a bit. I'll let you know. thanks for your advice.73 Giuseppe iu8eun

Hans! What should be the farads of C509? No matter what C510 is since Rick's radio receives an it is rhe same as mine. But I need to replace the missing C509 and have no idea what the value should

Karl, I checked that resistance during construction and after repairs. Very high resistance both times. -- 73, Dan? NM3A

Hi all As is normal, none of the MLCC in the QMX have any markings are all. So where are any of you seeing "103" on a capacitor which is supposed to be "225" (2.2uF)... I'm feeling lost... 73 Hans

Mike, Yes, it's connected by a trace. Walt - KK4DF

Steve, Thanks so much.? I completed my QMX build today, went through all the preliminary power board checks, loaded the firmware, and began testing.? No power out on any band!? Your inspection #3

No marking, it's just an unmarked tan SMD.? The component next to C509 is resistor R510. C510 is closer to the USB port, and is also a tan, unmarked capacitor.

Rick! What is the marking on your C509?!

Hang on, I was looking at R510, which is right next to C509. Maybe that's what you saw too, Karl.

Hello all, I just finished building my first QRP Labs project, a QCX-Mini for 10 meters.? I am new to this group and this is my first post.? Is this the appropriate group to discuss the QCX-Mini??

My C510 is also marked 103, which is 0.01uF, as you mentioned. I can confirm C510 is listed as 2.2uF in the assembly manual. That said, my QMX works fine. Would it work even better with the specified

Hi, Can anyone confirm somthing for me on my QMX build.? On the power supply board the central one with 3/3 pins. Looking down onto the plug when it is plugged in, is the centre pin conted to Q101

Ok, looking more closely at both, my Q103 is clearly further away from Q104 than Giuseppe's is. So Giuseppe, be careful and be extra sure there's no short between Q103 and Q104!

Q103 and Q104 can look close, but still be ok. There's close and then there's too close. Mine pictured here are fine, no problems.? Q103 is centered on its pads. Although the tab extends off the pad

Pathway for receive is exactly what I thought! But C510 being marked with "103" means 10 + 000 or 10000 pf = .01μf... right? Parts says 2.2μf. That marking should be "225" or 22 + 00000 pf = 2200000

If you look at the TAB of Q103, it looks like it's sitting on one of the contacts of Q104. Looks like you need to move Q103 away from Q104-- The short is to the pad of Q104, there's no way moving Q104

It looks like C509 is a crucial pathway for RX_In