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Old June 22nd 08, 09:37 PM posted to rec.antiques.radio+phono,rec.radio.amateur.boatanchors
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Posts: 33
Default Tunable hum in Heathkit SB-401 RF output

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


 
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