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Barry Quiet initially and noisy after warm up does sound like a cold solder joint or loose wire someplace. It could be the wiper on the volume control as was suggested by another person. A

Sounds like the audio has a bad jack, bad speaker/headphone or intermittent short to ground. Take something nonmetallic and tap and jiggle the components in the audio chain. Cold solder joint would

The first thing that came to mind was "defective capacitor". Which one? No telling... but some freeze spray might help you find the offending component

Sorry folks, I should have told readers the recording was made with the antenna connected. ?? The crackle is ALSO present when the antenna is disconnected.? I have not confirmed this but I

Great how-to!? I would question why you are calling CQ in the second message.? If it's to trigger ReverseBeacon, TEST will do it as well and is more appropriate for a non-responding beacon.? You

Barry, Is this recording with the antenna disconnected? ?Also have you eliminated any power supply noise. ?Maybe try a battery. ?It sounds like a dirty wiper on the volume control. ?Or maybe a

Barry Does this crackle go away when you disconnect the antenna? If yes then it may be something intermittent in the antenna wire or feed line. It definitely sounds like something intermittent in

Sounds like static to me.? Did you have an antenna connected to the rig or is that how it sounds with a dummy load on the antenna port? Interesting, Jim, K8IQY

Qrss freqs are on all band below the wspr bandpass and we are generally using 200 -300Hz bw, you might find some old lists saying 7000.8 and 3,5008 and so on but as both those frequncys have ben

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