Hello around sorry for my gonzo mail header :) But i was really shocked when my Quadra amplifier tripped completely while sending cw and the last shown power was 1380 watts!! The overpower protection from my powermaster meter opened the ptt and nothing strange happens.
Without the amplifier i got 150 watt out on 40m cw measured with the powermaster with good 1:1.05 SWR!! Normally i drive the amp with 35 watt (the driveslider shows 38 the whole time) and i changed nothing, i did a few contacts a few minutes before!? No, i changed something! I installed CW Skimmer to look how the new 96/192 khz feature works. When i stopped CW skimmer i was back to 35 watt output. Investigating my CW Skimmer setup, i found that i configured the audio settings not completely. I set Soundcard Driver to WDM and Signal I/O Device to my Virtual Audio Cable for receiving the I/O signal from PowerSDR (2.3.5). I didn't touch the Audio I/O Device, it shows 'FlexRadio Audio'. When i change this to another device like the 2nd Virtual Audio Cable used for transmitting all works well. It seems that CW Skimmer sends his audio output directly to the PSDR tx chain. Changing the audio volume in CW Skimmer to 0 gives me normal 38 watt output moving the slider up it mixes something to my cw signal. I did not find a right explanation for this 'FlexRadio Audio' device. Is it right that this device can transmit and override all regulations, including agc, completely? Is it possible that any other windows program could use it while i am transmitting? Where is a control for this FlexRadio Audio Device? This will be a explanation for some more short amplifier trippings since i installed PSDR 2.3.5, but did not figure out what happens. This behaviour was not seen with PSDR 2.2.3 Thanks you for any comment! Tom, DF2LH _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/
