It not just Jeff. I'm one of the guys who've been listening to the various audio tests. We first noticed something funny in someone else's 5000 before Jeff even got his. We ran experiment after experiment. This guy finally returned his for a refund. Then another fellow (not in the local rag chew group) broke in with his 5000 to say he's just waiting for someone to figure this out. His 5000 had the same problem. We've been listening and recording with a variety of equipment ranging from 1000's to direct conversion home brews.
It is subtle. It might be rare. But it is not unique to JCA I think Jeff's nailed it. The audio up through the driver stage is perfect. It gets funky in the final. Why and what to do about it is another matter. Jon On Jul 7, 2008, at 8:52 PM, Jeff Anderson wrote: > I agree, it's peculiar. But again - if it's a leveler issue (i.e. > software) I'd expect to hear it at the PA driver, too. But I don't > (but > perhaps others do? Ref: 1st half of 6 July test). By the way, I > just > checked, and the Leveler has been OFF (box not checked) for all of my > tests. The only TX effect I have enabled is TX EQ, which is set to > the > same EQ values for all of my tests. > > What I wonder is this: can distortion at RF (rather than at AF) have > this same "soft compression" effect, after the RF is demodulated? > > - Jeff > > Frank Brickle wrote: >> On Mon, Jul 7, 2008 at 7:30 PM, Jeff Anderson <[EMAIL PROTECTED] >> <mailto:[EMAIL PROTECTED]>> wrote: >> >> >> Frank, I agree, I'm sure the distortion is not in the ADC/DAC >> components >> (nor software, nor input stages) either, because I don't hear it >> at the >> 5K PA's *driver stage* output, which is well after the output DAC >> (ref: >> 1st half of 6 July recording). The problem only pops up at >> the output >> of the *final* stage. >> >> >> What's peculiar about the compression is that it's "soft," not >> clipped. You have to wonder about the leveler settings. >> >> 73 >> Frank >> AB2KT >> >> -- >> "Sapristi nabolis!" -- Count Jim Moriarty > > _______________________________________________ > 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://kb.flex-radio.com/ Homepage: http:// > www.flex-radio.com/ > _______________________________________________ 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://kb.flex-radio.com/ Homepage: http://www.flex-radio.com/
