Philip Covington wrote: > On 8/9/07, Robert McGwier <[EMAIL PROTECTED]> wrote: >> Philip Covington wrote: >>> On 8/9/07, Robert McGwier <[EMAIL PROTECTED]> wrote: >>>> http://n4hy.org/20MeterBottom.png >>>> http://n4hy.org/6MeterBottom.png >>> Are these with a dummy load connected or operating into an antenna? >>> The 20 meter picture's baseline is about 10 db lower than the 6 meter >>> baseline. >>> >>> I would be great to see the bottom end of 10 meters also with the >>> radio into a dummy load. >>> >>> 73 Phil N8VB >>> >> >> These were in a dummy load so you could see the spurs at their worst. >> >> Your wish is my command: >> >> http://n4hy.org/20MeterBottom.png >> >> And again I caution that these are done with the beta radio. Six meters >> on my radio needs a preamp but it is utterly trivial to add one. >> >> Bob > > Thanks Bob: http://n4hy.org/10MeterBottom.png <-corrected link > > Since they are all into a dummy load it looks like the NF of the radio > degrades about 5 dB from 14 MHz to 28 MHz and about another 5 dB from > 28 MHz to 50 MHz. Is that a safe assumption? > > 73 Phil N8VB >
On my beta radio, it is. -- AMSAT Director and VP Engineering. Member: ARRL, AMSAT-DL, TAPR, Packrats, NJQRP, QRP ARCI, QCWA, FRC. ARRL SDR WG Chair "If you're going to be crazy, you have to get paid for it or else you're going to be locked up." Hunter S. Thompson _______________________________________________ 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 Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
