Si5351A synthesizer I have both an Si5351A with TCXO one with the 27.000 MHZ crystal, both are mounted in the same type QRP-LABS case, both have the same highly regulated power supply. A ham person wa

I would like an easy program to makes PCB's from my small projects that I ugly construct. Then maybe order a few on the web. Any ideas? I usedI used to draw on copper boards and etch but that was year

Hi All, Does anyone know how often the QRP Labs Balloon tracking page is updated with fresh data? I'm testing U4B "AE0IH_T1" currently in the back yard under solar power. WSPR.net shows propagation, b

I built my first of two QDX Rev.3 transcievers. The toroid winding wasn't that bad after building a QCX a while back and then a (tr)uSDX recently. I was able to make a JS8 QSO between Utah and Idaho w

Hi all 1_09 has several bug fixes and is now available on the QDX page http://qrp-labs.com/qdx and the direct link is http://qrp-labs.com/images/qdx/firmware/1_09.zip Remember QDX firmware is the same

Finished QDX V3 yesterday. It's 9V unit and the sixth I have built-all others have worked just fine, but this one is DOA. Upon power up it just goes to boot and shows no firmware along with the LED on

I thought I knew what I was doing, but after 2 days of test a U4b in the back yard, it's obvious I don't! I am getting good reports on wsprnet.org, but no luck on QRP-LABS.com/tracking page... The U4b

Hello all, Can anyone point me to any articles or guidelines on integrating a device like ProgRock2 into older gear? I'd like to use them in a couple of Kenwood receivers, R-1000 and R-5000. I think t

When arrived, I just tested the serial connection to set the frequency, didn't even check output. Took onboard a ship in a box (in the original shipped enclosure by QRPLabs). Even before connecting to

Well this is embarrassing! I soldered the dummy load project and ended up with 0 ohms across the connector. Any ideas on what went wrong here or for ideas to salvage the project without desoldering al

A new chat has been created: My apologies if this is a duplicate message. Curious to know if anyone could provide some advice. I've completed my amp and have moved on to sections 7.3 and 7.4 in the ma

Hi all, I have configured my QDX-M as QDX-HB (only jumper T1 to GND), added 2 turns to the L12 and testing it as dual band 10m / 12m RIG. In the attached PDF you can see the RF sweep at 12m. So far so

Hello, a note for radio amateurs from DL: The QCX has a CAT interface that emulates a TS-480 with 38400 bit/s. I used a YP-05 board for this. If you enter the data in UCXlog, data is transferred witho

QDX + Linux users- I am attempting to use my QDX in Linux on the Inovato Quadra with the recent new factory firmware that comes with ham applications pre-loaded like WSJT-X, JS8Call, and fldigi. The Q

Today I put a U4B up again after it crashed months ago due to a heavy wind that broke the tethering line and damaged a solar cell. I put the 3 band fan dipole for 30,20 and 10m up in a snow storm toda

I have a couple of QDX rigs and use them on HF Pager digital mode a lot. Look it up on youtube. Amazingly simple and covers 200+ miles with no skip holes on 40m. I have connected back to home qth from

Newbie Question...thanks ahead of time for your help... I am configuring a LightAPRS-W and getting ready to do some testing. I have run it on USB power and successfully seen the output on APRS.fi My p

Wondering if anyone operates their QCX 50W amp portable or in the field? What power supply are you using? Did you go for close to max output or did you opt for a little less? Do you have any suggested

Hello all. I just finished a Rev 3 QDX. I installed 1.09 firmware and did a reset. Power output is good on all bands. The Audio sweeps seem good also. All seems to be good except the RF bandpass sweep

Reminder Tomorrow, Monday March 13th, is the monthly QCX WARC Party. See https://www.qrp-labs.com/qcxmini/qcxwarc.html for all information. Join the discord page in the #qrp-operation channel to post