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Old June 23rd 08, 02:32 AM posted to rec.antiques.radio+phono,rec.radio.amateur.boatanchors
Kim Herron Kim Herron is offline
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First recorded activity by RadioBanter: Mar 2008
Posts: 8
Default Tunable hum in Heathkit SB-401 RF output

Me agn Dave!!

The other model is an SB-614 (I have two) and it works better. For
a C note it's a good deal and if you're gonna do a bunch of transmitter
resto work, it's the ticket

Kim W8ZV
wrote in message
...
On Jun 22, 4:07 pm, "Kim Herron" wrote:
Hi Dave.

Over the years I too have run into the same situation and what the
fellows here are telling you is most likely correct. I can also tell
you the you don't need any antenna to pick up that transmitter when
it's
that close. In fact you'll do better if you don't use an antenna or
something very short to get a better picture of what your xmtr sounds
like. This is one time where an RF envelope monitor scope comes in
REAL
handy. If you have hum on the transmitted envelope you'll see it on
the
scope.
Kim W8ZV


Thanks, Kim. As recommended by another poster, I think the best
course of action is to use an external antenna and make a few contacts
to get signal reports.

You’re right about the monitor scope. There’s a companion Heakthkit
SB-610 Monitor Scope that I don’t have, but could use right now.

-Dave Drumheller, K3WQ