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Ok, I was planning to replace Q6 and have it on hand.? I will set auto space to off. thanks for your help! Paul To: [email protected] Sent: Friday, October 20, 2017 7:37 AM Subject: Re: [QRPLabs] QCX

I operate almost 100% on CW and I still write everything down :-) I'm happiest at ~16 WPM but can go faster if pushed and the other operator is sending good CW. Only now am I starting to be able to

Hi Paul Perhaps there are two possible causes. Firstly, check menu "4.5 Auto Space" and make sure it is Off. That feature didn't work in version 1.00b but is fixed in version 1.00c. Secondly, it is

It works well if I switch it to the cw practice, without rf output.? I get about 3.3 watts out at 11.8 volts in.? with rf output, the displaydims slightly. Paul To: [email protected] Sent: Friday,

1.00b To: [email protected] Sent: Friday, October 20, 2017 7:10 AM Subject: Re: [QRPLabs] QCX 40 sidetone issue Hi Paul What firmware version do you have? There were a few issues with the sidetone and

Hi Paul What firmware version do you have? There were a few issues with the sidetone and messages functionality. These were resolved in version 1.00b. 73 Hans G0UPL http://qrp-labs.com

Thanks Peter I'll make a note of that.. Never really got into CW exept for getting past the test for my full licence many many moons ago. Long story short, over the past three years I've had a couple

Hi Olgierd Yes, reducing C33 to 180pF will reduce the gain a bit. But there is plenty of gain anyway; and if it is the only way to stop the oscillation then it would be a good tradeoff... I am still

Hi Hans, I tried adding 680pF SMD cap underneath C34 (something about capacitor inductance), but it didn't really change the behavior. I got two replacements for the dead Q6 ( 2SA-1315 and 2SB-892),

Have you seen the: https://youkits.com/products/youkits-tj2b-2015-hf-ssb-cw-handheld-transceiver Also, the Elecraft kx2 is designed to be used like an HT:

Hi all There seems to be some oscillation sometimes in some of the kits. I am not 100% sure of the cause yet. I am interested to know if anyone has seen it, with the new MPS751 transistor at Q6? Also

I'm happy to have a slow CW QSO on 40m with you (or anyone else) that wants some on air practice. PeterO G0DZB

Hi Eddie... No, I was lucky and didn't need to add/remove any turns. The tuning is quite sharp and needs a plastic or whatever trimmer tool as metal effects the tuning. Assuming you used the correct

Hi Phil, Could you please share your experience on peaking the BPF on 40m. Your T1 looks neat, did you need to remove turns on the bigger coil? Your C1 looks FB. Is it a sharp peak? My QCX works but

Hi Olgierd / Peter, Just finished dinner and had a closer look. I can simulate Olgierd's issue with low power out and high current on the first PTT after power up. I have noticed this before and

Hi Glenn, thanks a lot. Yes, when transmitting with "low power" finals get hot quickly, I assume the current goes into RX front end. Well, not an assumption - it actually does - I've seen it on the

Early on in testing of my 17m QCX I found that if I slowly increased the PSU above about 13V the output would suddenly drop and the current increase (luckily I had a current limited PSU). This seems

Hi Olgierd, I quickly tried to duplicate your setup, monitoring the RF out (top trace) and the control signal to Q5 at pin 14 of the processor. This is my trace, it looks OK. One thing that did not

Gate-source confusion AND Yellow-Blue confusion ! I better not do anything important today as I seem to be getting everything mixed up LOL ! PeterO G0DZB

@Peter - yellow trace is the output power, 50 ohms on the BNC connector. Blue trace is the gate of Q5. @John - these are all equal length "DAHs", some of them are randomly transmitted with higher