George, The mic gain for an SDR-1000 is totally dependent on the sound card used. Can you elaborate in more detail what card is used and how it is connected? Also how are you determining the wattage transmitted?
Adjusting the PA gain as described below will result in a signal that is probably not very clean. Just a comment about SSB and wattage. When running SSB modes, you will not see 100 watts unless you have a true peak reading watt meter (some that claim they are aren't) If you do not have a "true" peak reading watt meter, you will only see RF output in the 10-20 watt range. - Tim ________________________________________ From: [EMAIL PROTECTED] [EMAIL PROTECTED] On Behalf Of George [EMAIL PROTECTED] Sent: Sunday, May 04, 2008 3:59 PM To: [email protected] Subject: [Flexradio] Microphone drive and auto-tuner settings in PowerSDR Probably one of the most frustrating things about the SDR-1000 is getting the transmit audio up to a decent output power level. When the calibration routine is used the digital modes and CW are just fine at near 100 watts into a dummy load. But transmit audio is always at a 1-5 watt levels. Which I'll admit it sounds very good at these levels. Cranking up the mic audio beyond about "40" results in poor sounding audio. Turning on "mic boost" is about worthless as it just generates lots of white background noise when transmitting even with the mic unplugged! My solution (and probably several others) is to adjust the PA settings to the point where mic settings below "40" result in a more normal 40-75 watts output. But this also throws off all other settings as they obviously reference to the PA calibration settings. Especially the built-in auto-tuner settings. It seems to be programmed to stay at 15 watts no matter what the actual power output is. Of course if the PA settings are tweaked, the auto-tuner doesn't follow suit and when tune is selected as much as 70 watts can be dumped through the tuner. Which I'm sure isn't doing it any good. Is there any way of adjusting the auto-tuner settings? I'm almost ready to yank it out of the radio and go back to using an external tuner as it's settings are adjustable in setup. My current microphone is an MH-31 which is from my FT-847. It is actually the best sounding mic I've used on this rig. I've tried all sorts of mics including amplified mics, computer mics, and major amateur brand desk mics. None seem to have the drive levels that this radio requires. Am I stuck with purchasing an external mixer? I have searched the knowledge base and aside from recommending purchasing Heil microphone cartridges, I haven't found much in the way of discussion of levels required by this rig. George N7BUI _______________________________________________ FlexRadio Systems Mailing List [email protected] http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kb.flex-radio.com/ Homepage: http://www.flex-radio.com/ _______________________________________________ FlexRadio Systems Mailing List [email protected] http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kb.flex-radio.com/ Homepage: http://www.flex-radio.com/
