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30 Metre QCX, v1.00d ?powered from 12 Volt battery I'm having an issue with crackle on my audio. ?I've posted on this previously. ?I thought if I attached an audio recording of the crackle, it may

All, I’ve got quite good at shoehorning multiple modes into a ten minute frame on a U3S - At the moment I’m running a total of five modes and I will be able to increase that to six modes once the

Dave, I'm just finishing a U3S and would like to join in. I'm General class though. Is anyone looking at the alternate, non Extra class QRSS spots? I can only go down to 7025 Khz on 40M I

Dear? Al, The way I do it is to setup TxS screens to about 6 or so.?? Then you program each MODE TRANSMISSION SCREEN for each frequency you want to transmit on.? You also need to set DIT to 005

Hans Okay, I stand corrected. I guess I have never worried about AVCC before. I always relied on the internal 1.2 volt reference for measuring analog voltages with ADC. I went back and read over

Nicely done! Terry-W6LEO

Just thinking .... maybe toggling transmit using the onboard key while adjusting the reference frequency..... 72;Kurt -W2MW Get Outlook for iOS

Is your beacon day or night? I'll look for you. 73

Yep. ?I’ve gone through the alignment now a couple of times. ?Maybe a third time will prove to be the one! ?I’ll have a look this afternoon. This morning I have to shovel snow!? I have a

Good day all;? To Hans, just a suggestion for an enhancement. I found manually calibrating the reference crystal a bit cumbersome having to set the frequency, jump out of the menu,

Hi Dave I have not tried this mode. Do you have a list of all the recommended QRSS frequencies and speeds or a link to them please. I might try reprogramming my multiband U3S if I have the

Hi Bob Fixed! 73 Hans G0UPL http://qrp-labs.com

Hi All, I mounted the board in a case I picked up at a fleamarket and have been enjoying listening to the QCX this weekend.? (some kind of Italian CW contest this weekend...)? I am really impressed

Arv This is not correct. The AVcc pin provides power to the internal analogue voltage circuits in the ATmega328. The QCX uses the ATmega328 ADC with the reference set to the supply voltage (AVcc).

Hi -? I have a 20 meter kit and I started the alignment procedure and I noticed that I can peak 8.7 by adjusting the capacitor C1 but then when I try adjusting R27, R24 and R17 I am always at the

Hi Glen, I get the feeling that T1 is fairly tolerant. I've done 4, 4, 4, 31 windings instead of 3, 3, 3, 30 -- in a guestimate attempt to make the RX work on both 20m and 30m (but I cannot check

GM Barry, I've 30m QCX without that problem. I built mine with T1 a little different 3, 3, 3, 31 windings instead of 4, 4, 4, 30 windings, but the audio range is fine and sensitivity on a par with

Thanks for the info Dave ... as you say, not so cheap. So far the ECS TCXO on BB01 has been OK ... I can see some 'steps' occasionally, but the WSPR and JT9 still seems to decode.

oops, I just tested something here locally and screwed up the tracking map. Perhaps Hans can fix that? Looks like BB01 got hit with ice loading(?) yesterday. There was a sharp

Dave, I'll give it a try!? Am I correct, each symbol is 6 seconds? Sorry, this is all very new to me! ATM, the message line I use for a CW ID at the end of my WSPR transmission and my message line