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good evening everyone, indications for the list and low audio for qcx, it may seem obvious I'm talking about my modest experience but apparently the lm4562 does not like at all the impedances of 8

Can anyone with the DDS VFO & GPS tell me what they have set on Line1 & 2 for comparison? My line 1 ? #FQ ?? #EE My line 2 ? #HB 73 Michael KM4OLT

wrote: The OCXO module has temperature controlled crystal and the synth is outside the crystal chamber, two separate layers. I've not tested mine on other modes than WSPR (0 drift), so can't tell if

Well this is good news!? I'm 2211 so hopefully not too far behind you. Thanks for the info. Jim -- de K2TL.. since 1964

QRP Labs QCX case by G8XUL? :-) | | | | | | | | | | | QRP Labs QCX case by G8XUL This is my attempt at a case for the very excellent QRP Labs QCX transceiver. I'm very

Also love the compact solid build, very nice work! Now if only there were a way to access the micro-switch straight key. I don't suppose anyone has any ideas on that?

OK Alan, No I don't have a scope. I think the best thing I can do is replace Q6 (I've just ordered four new MPS751s) and if that doesn't cure it I will pass it on to someone better placed to

Just looked at the shipping status web page and it is at 166X. Was stuck at 1453 for a real long time.But that is not the best part/ I was assigned 2121 and received an email this morning that my kit

Either the IC1 is blown, or the GPS module (or both). DMM pin 20 of the GPS module (safer to measure on R1). A periodically varying ~3.3V signal indicates a working GPS module. If there's a varying

Steve, The others do not comment? Normally if the IC is being clocked a meter will show about 1/2 the supply voltage, about 2.5 volts. While some meters will be affected by the RF this does not seem

Nice feature, but kind of scary to run the lithium battery flat without monitoring the individual cells. There's no way for the QCX to detect this on cell level. I personally would definitively use a

Interesting, I just went to this site: http://www.gqrp.com/technical2.htm and it concurs with your number of windings on the T37-6. However I have another document revised by George Dobbs - G3RJV

Hello, I had the same problem: A replacement of Q6 and Q5 helped to solve the problem. 73 de Hajo dl1sdz --- Cela est bien dit, mais il faut cultiver notre

Hi Daniel One of Clk0 + Clk1 is shut down. The other one is set to 27MHz (straight feed-through of the reference oscillator). I forget off the top of my head, which way around it is. This was not in

If the original problem was a short on one of the Q1-Q3 then Q6 will probably be dead as well. Change it to the new MPS751 (or similar) instead of MPS2907. I don't see any reason that Q5 should be

Hi, I have now replaced all the BS170s at Q1, Q2 and Q3? - no difference. Pin 1 of IC3 has 4.75V on it key up and 4.72V on it key down.? The gates (Q2 centre pin) have 5.58V key up and 5.52V key

Here is the exact item i bought: DIY Extruded Aluminum Instrument Box Electronic PCB Enclosure Project Case (

So I have just finished my 40m QCX, done the alignment, reception appears good. Hooked up a dummy load and keyed down with the internal RF meter, 5.2W !? Power supply is my 30A 13.8v Yaesu

Very nice build Nick. After looking at all the inventive build approaches that people have used, I will build mine the same way but without the built-in speaker. I like your idea of using stackable

Thanks for your reply and the links Alex, I will build a probe at the weekend, I have a few 1N4148 diodes, I will let you know how I get on. 73 Colin.