Smitty, Just curious if you are using the same mic to make your tests from one rig to another. Average talk power has a lot to do with the freq. response of the mic. If a mic has a lot of energy between 200 and 800 cps it will produce lots of "talk power" since the there is a lot of energy from the human voice in that range. On the other hand, if the mic is flat, you will see a dramatic decrease in your output unless you boost the audio gain. Boosting the mid-range doesn't really sound too good, but it does have a great effect on SSB for punch.
If you use a UB-802, you might try boosting your mid-range on the little EQ to see if it makes a difference on your relative output. This is just a thought... I use a digital vector wattmeter that reads true peak power. On occasion, I have seen peaks as high as 140 watts from my Flex on 75 meters. Usually it's in the range of 90 to 105 watts. Good luck in finding the solution. 73 Brian / w5ami On 3/15/07, Myrlen Smith <[EMAIL PROTECTED]> wrote: > I have a question for the group maybe some have had this issue. > > My drive power on ssb seems to be down 10 db in comparing it to my 756pro. > I've made these tests on all bands so its not band related or antenna related. > > On key down both rigs are in 5-10 watts of one another but on ssb the 756pro > seems to double the SDR's readings on my outboard peak reading meter. > > On different bands with local hams they have all told me the 756pro is at > least two S units higher than the SDR-1000. > > I recently hooked up a SG-500 amp to the SDR and found out the rig will drive > the amp on cw at 40 watts in and 500 out but on ssb it would not drive the > amp at that level, I had to set the drive at 100 to drive it to 500 watts. > > Now keeping all the above in mind the SDR-1000 and SG-500 together give the > same signal strength as the 756pro with no amp. > > I have done the power calibration a couple of times and the mic meter on the > SDR reads 0 to + like it should so I'm at a lose on what to try next. > > In fact I have to SDR's and they both have this issue. On the one I'm using a > Behringer UB-802 with a Delta 44 and the other SDR I use the Edirol FA-66. > > I've also tried the mic boost but that just increases the back round noise. > > I hope I explained this well enough so anyone can give me some ideas. > > Thanks > Smitty WB3IAL > > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/attachments/20070315/e1f1ec87/attachment.html > _______________________________________________ > FlexRadio mailing list > FlexRadio@flex-radio.biz > http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz > Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ > FlexRadio Homepage: http://www.flex-radio.com/ > > FlexRadio Knowledge Base: http://kb.flex-radio.com/ > -- Suburbia is where the developer bulldozes out the trees, then names the streets after them. - Bill Vaughan _______________________________________________ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
