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Hi George, The 12V power source is a 6000mAh Talentcell rechargeable battery. To connect power to the radio, I'm using the included DC plug that I got as part of my kit, which I've joined to one of

Hi Michael, Please describe the power source in detail. Including DC plug. 73, George K3GK

I finished my QMX+ kit 2 weeks ago.? I built it for 9V, and held my breath as I powered it up for the first time.? ?Everything seems to work fine, and all bands receive and transmit.? I called CQ

I tracked it down with a portable radio with shortwave with a signal level indicator (a must).? It was not easy since the RFI was coupled into the power lines and shrewd up many houses away.? The

Thank you for reply, now to figure out where is it ? it will be hard since it shows once in a while and it lasts 3-5 minutes

I think it can be corrected with filters or settings somehow. When I change to DIGI mode on the QMX, a lot of these noises disappear. In the image below, the bottom portion was DIGI, the top portion

Solved. Q502 was missing.

Hi all Since I have received several inquiries about items not shipped: we have Eid public holidays this week which is why there were no shipments on Monday and Tuesday. QRP Labs office re-opens

Hey all! Got my QMX+ rev 3 last week and have had a blast assembling it over the past few days. Finished it last night, booted just fine, and was able to tune some CW on 10m with a big grin on my face

An advantage of diodes is that they are a simple 'linear' solution, but yes, as others have noted, they will generate heat.? Each diode drops about 0.6V, and during transmit the radio consumes less

yes and yes search prior messages for winlink and/or vara

Hi, has anybody tried the new firmware with VarAC and/or Winlink? Does it work?

Hello Azgael, 9.7 V is wrong for this gate voltage. It looks like Q101 is broken. Yes, it's also wrong. It looks like Q102 is also not ok. If you remove Q101 use the chance to measure voltage at

Yes, so don't bury them under layers of tape/insulation or they will overheat!? W is still E x I. 73, Don N2VGU

I'm happy to report that the Firmware Version 1_01_003 is working well on my radio. Audio receive is excellent, sensitivity as well. Transmit function got the job done. Mic gain is 60 and mic

I see this with our house indoor ceiling fans. ?they all have motor speed controllers that generate lots of RFI..;-( ?plus... being in an HOA where the homes are smaller and closer... lots of people

I have the issue too since before the SSB FW release.? It has been suggested (by Jeff Moore here /g/QRPLabs/message/136646 ) that this issue could be PCM1804 related.? I bought a

Jeff, I appreciate that. I did look at that and wonder! I went back and checked the build guide because I knew it was in the instructions for the QMX. I avoided trying to remove that display at all

Just leaving this here for anyone fault finding Just dealt with my second ?MS5351M 'subtle failure' in a couple of years First was in a QCX +TCXO where after 20 minutes or so running the

This may have been the audio out processing, it was set to default, setting it to off seems to allow normal operation with no need to play games with the thresholds.