On 9/27/2010 1:20 PM, Pumbaa wrote:
I heard a ham the other night on 40 meter SSB. He was running a Collins
S-Line with the Collins amp. It was the best audio I have heard recently,
it was clear as a bell.
Part of that comes from Collins use of RF feedback to keep down intermod
products. Collins spec was 3rd order 35 dB down while most solid state
rigs hardly do 25 dB down 3rd order and have a lot more 5th and 7th
order products coming out. In the tube rigs, 5th was hard to find and
7th not looked for it was so small. That's not true with the solid state
amps. Not to say that the Swans with sweep tubes were all that linear
either.
73, Jerry, K0CQ
I also own an Orion II and a faithful Century 21.
Bells and Whistles. Soon a transceiver/PC that works DX contests while you
watch TV and drink a cold one. Just program it to send RS 5X9 and that will
take care of most of the qso.
Tom AG8K
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