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Hi Stan ….you said… a) Transmit EQ - note that sometimes the 'global gain' here defaults to 20 or some high value, which distorts the tx audio; change it back to 0 (this could be the reason for

Hi Michael, not sure what ‘sidebands’ you are asking about. The ‘spurs’ I see strongly in receive on 6m, 10m and weaker progressively as I go LF in frequency, are every 500Hz, strongest at

Printing is sometimes useful for highlighting sections. ? Also for Writing notes, menu settings and measured voltages on a schematic for future reference On the other hand using a display lets you

Hello Ken Have same issue. Could detect LO signal (RX -12kHz,-40dBm) and additional sidebands at 6 m and 10 m at BNC (RX).see also my Posts. Another OM also detected these Signals. Resoldering

Stan, many thanks for that, I will try your suggestions. Before you replied I tried an interesting experiment, in case the problem was with my microphone... I set up my QMX+ for WSPR transmissions the

Yes, all terminals of T507 are at DC ground.? The inductors allow the RF signal to pass, and generate the FWD and RVS signal detection for power and SWR calculations.

I redid my windings as you suggested and they came out better.? Not perfect but better. After soldering in place, when I checked the connections with a DC meter on ohms everything seemed to be very

Good idea to have spare 74ACT08's if you plan to blow the BS170's. When the BS170's fuse up internally I'd guess the 74ACT08 gate drivers might see 12v, at least for a moment. Look on Mouser or

New to the group - wanted to say Hi and since this thread is about observations and best QSO - I wanted to share my recent experience with the QMX+.? I am very fortunate to have an awesome? brother

Hi Mark, How did things go with your setup? I’m in exactly the same situation! I’ve run all the tests, and from what I understand, the MAX3221IPWR chip used in the IC-9700 should be able to

I threw a few condenser mic elements into my last order, the one Hans recommends for the QMX. My whole order had a 10% tariff fee added on, which didn't thrill me.

The IC503 likes to fail along with the BS170's. No part numbers unfortunately. Schematic shows IC 503 is a 74ACT08D but chip is marked TI32A35SM ACT08 which I cannot find a spec sheet on.

I need to order some parts from Digikey. I though it would be good to order some backup parts for the QMX+. Besides BS170's what are the components that fail most frequently? Also if you have specific

I say do them all, they're super cheap. Make sure you get them from Mouser or Digikey. There are a ton of fake bs170 out there.

To Da Wiz; thank you, and a request, to make it better. Personally, I would appreciate the choice to use AGC, with my QMX+, or not, for all modes. I have used fast or slow AGC with my FT-990 and

Hi all, I learned from the operating manual that the SWR measurement is from the center of the band. I had forgotten this trying to squeeze a POTA activation while on a business trip this week. My SWR

yep sorry the talet cell operates as you specified. the one i have can either charge with a 12.6v charger, or a usbc cable.? i have a couple other regulated batteries that i can choose 12v out.? and

My QMX arrived last week. Since I operate primarily digital, ( but seriously working on honing my CW skills) I was able to get several 'DIGI' mode programs to work. Not so easy with the SSB-required

Here's the complete thread: /g/QRPLabs/topic/112783679 ( /g/QRPLabs/topic/112783679#msg145840 ) You can see all recent messages to the forum with a web browser here:

Randy, you would find some of this information when reading Hans papers. And did you check the Wiki? I think there is such a document already, but not complete now. 73 Ludwig