At 08:50 AM 7/10/2008, you wrote: >Mike, > >In all FlexRadio models, AM is really an amplitude modulated 11 KHz carrier >that is transmitted in SSB mode on exactly the same hardware signal chain as >the SSB signals. In other words, AM is a SSB signal on both the 1000 and >5000. AM and SSB are both transmitted the same way from the digital to >analog converter through the PA stages to the antenna. There is no hardware >difference. > >Gerald > > >Gerald Youngblood, K5SDR >President >FlexRadio Systems
I'm of the thought that there is an external cause, mainly the power into the radio. Although the signals are generated through similar methods and using the same hardware the effect on current drain is not the same. AM with it's steady carrier power always on limits the variation on the power demands, SSB on the other hand it can vary the current drain from the bias point all the way to Full power current from millisecond to millisecond. Maybe I missed it but I have not heard of complains on AM mode with this issue which again makes me think of excessive voltage variations due to varying load on the Power source. Hopefully someone will measure their voltage at the connection to their radio while running full power on voice SSB. While you are at it, put a big Ferrite choke and bypass caps on it to keep RF out. Cecil K5NWA www.softrockradio.org www.qrpradio.com "Blessed are the cracked, for they shall let in the light." _______________________________________________ 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/
