I've been playing with some cheap GPS modules bought from eBay...~£5...Although they do work, they take around 20 minutes or so to lock; I've tried different antennas but the performance is the same.

Hello, Has anyone had any successful experience with the SWR bridge function of the QMX? If so, do you think it would be able to substitute for an antenna analyzer when tuning an EFHW antenna? Thank y

I have my QMX #378 built. This is the first QRP Labs rig I've built. I've previously built an Elecraft K2 and three (tr)uSDX rigs as kits. I was pleased to get the QMX powered up this morning with no

Thought I'd ask advice on the QCX+ battery indicator, to wit: (1) I have two QCX+ rigs: a 40m version (firmware v1.09a) and a 20m version (firmware v1.05). (2) The 40m "7 Other" Settings are as follow

Hello all. Here's a question...My QCX+ 40 has apparently forgotten how to send paddle at anything less than 20 WPM. No matter how I set the Keyer Speed, it still runs at 20 ( as reported on RBN). I've

So far the initial tests on the QMX seem to be working fine. Just transmitted into a dummy load on all bands and everything seems fine. Will test more when I get it home later this evening, I was a li

It's alpha firmware, but is anybody having success with the QMX build yet?

I have completed the build of QMX #008! Now the search of the shop to locate a 12V source to power it up. I've read the concerns of not exceeding 12V - and the 13.8V on the bench is too high. SLA batt

I've been trying to connect my qdx to a linux installation on an Inovato PC. Ikeep getting a connection error. Since I'm a bit lax in my linux skills, I thought I'd try on a laptop that I've used for

Don't have my QMX yet, but wondering what the available power options are for field operation? Since the 12V limit is (as of now) a hard one, that seems to mean a standard 12V SLA or LiFe battery will

Hi, finally got a chance to test my HighBand QDX on TX today and started very positive, 20m worked perfectly, have built it for 12v but started carefully with 9 volts so as not to destroy anything :-)

With Windows 11, JTDX and Putty I get the following: - Putty started with COM 5, the screen remains blank, no indication of menu. (I got the menu once only and could do some settings like <Japanese Ba

Hey all, What do people usually use as a solar power source for the U4B? I am looking for something cheap and on the budget, so I was looking for a solar power cell on Amazon, but no such luck exists.

I'm building the QMX and have just installed the binocular toroid T507. As for checking the solder joints, between which letters can I expect continuity? Obviously between A-A, B-B, C-C, and D-D, but

Hi all, Once again posting a question not very related to QRPlabs, this is just about general RF circuit design - let me know if I ever cross a line and should find a place to post elsewhere :) I am c

Well, my QDX may not be on *ALL* bands but give me time ! 72, Bill, N4QA

Hey all, What do people usually use as a solar power source for the U4B? I am looking for something cheap and on the budget, so I was looking for a solar power cell on Amazon, but no such luck exists.

Pardon me for being slow, but I want to make certain that I wind this correctly. T507: Leads B and C on the left side of the photo are made from the same wire one loop through . . . . and B and C on t

For Sale: QCX+ 40 / Original QCX 30 / Original QCX 20 Good day, All of the above are excess to my needs; it’s time to thin the herd. All built by me and all in good working and cosmetic order. Origina

Can someone help me as I seem doomed trying to get one of these amps to work properly. My second kit will give me 36v p-p output with 3.6v p-p input only on 14 MHz with a 12v supply. Current drawn is