>
>Subject: RE: [AMPS] Bias for SB-220
>Date sent: Fri, 4 Jun 1999 03:23:21 -0700
>From: Rich Measures <measures@vc.net>
>To: "'amps'" <amps@contesting.com>
>
>> >Rich says:
>> >
>> >> The bottom-line is that there should not be a situation where the bias
>> >> can be in the non-linear/Rx mode when the RF relays are in the Tx mode.
>> >>
>> >
>> >I must admit that I've never thought it through very carefully before,
>> >but unless the bias is switched before the RF gets there, you must be
>> >effectively pulse modulating.
>>
>> ? indeed.
>
>Bunk. The claims that all kinds of splatter is produced are
>nonsense, mostly based on not understanding the effects of IMD.
>
? I did not say that all kinds of splatter are produced. By listening
to two receivers in stereo, tuned about 4kHz apart one can hear a
spit-spit sound whenever the bias is in never-never-land. Alpha 77s had
an abundance of spit-spit distortion. Newer amplifiers with RF-switched
bias are a bit better, however, they still produce this feculence.
. When you proved that your new, improved RF-controlled electronic
bias-switch was better than all the rest with a 3-Tone Test, you made my
day, Mr Rauch. . Laughter is indeed the best medicine.
>.......
>
>The bulk of the clicks Rich reports,
? I heard spit-spit distortion on the adjacent channels from SSB
voice-modulated signals. I did not hear clicks. // Tom: free,
unsolicited advice: Before saying anything in a discussion, it is best
to read what the other feller actually says.
> if he actually hears them and if
>it is not just psychosomatic clicking,
? whew
btw, what was the bleeder value in the Bill Orr/"dead-on" resonant choke
supply that almost QRTed you?
- Cheers, Tom
Rich...
R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures
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