|[AMRadio] Monitoring Modulation Accurately|
rbethman at comcast.net
Sun Nov 17 16:33:06 EST 2013
We are just going to have to agree to disagree.
The sample jack on the TR switch fed directly into the TEK 5440
definitely showed a good bit of flattopping. Hence the whole deal in
reducing the Mic Gain.
The plate voltage was in excess of 2300VDC. I loaded to minimum plate
current or the "dip" that one tunes an Amp or any PA to.
The R-390A was definitely in 16KC position. I wouldn't receive AM any
narrower than that, as it sounds crappy.
The folks giving critical audio reports both when I was flattopping and
after I reduced the audio would include WC3K, WN3B, W3MTG. I know that
none of them would report other than what they heard. If you've talked
with them, then you know their straight forward critiques on a signal.
These folks will definitely tell you when you have crappy audio.
Although WC3K is now an SK.
He was getting his BC-610 up and going after I got mine up. He wasn't
all that thrilled with the M.O. tuning of the Tuning Units, and was
trying to use a Johnson VF-122.
I've gone to using an HP-3336b Frequency Synthesizer for the very same
reason. Trying to use the M.O. tuning is frustrating and a royal PIA!
It is the one place that a Jackson reduction drive would have made GREAT
Bob - N0DGN
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