[AMRadio] CE100 audio problem

[JCANDELA at prodigy.net]

Jason,

   Try the exciter / amp combo into a dummy load to 
rule out RF feedback. If the problem goes away then 
you have a direction to proceed, i.e. too much RF in 
the shack, improper grounding of the two rigs, maybe 
you need some ferrite beads over the coax between the 
exciter, and amplifier, etc. When operating into an 
antenna, does it still happen with the mic gain at 
minimum, or get worse when you pick up the microphone? 
Regards,
Jim 
WD5JKO
--- Original Message ---
From: "Jason Login" <jlogin at mindspring.com>
To: AMRadio at mailman.qth.net
Subject: [AMRadio] CE100 audio problem

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>--- Bob Login
>--- jlogin at mindspring.com
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>--- EarthLink: The #1 provider of the Real Internet.
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>Hi,  
>I have a CE100 that I'm trying to use as an exciter 
for
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>a linear. On AM as it heats up it generates a rumbling
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>sound (it self modulates..sounds like the background 
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>noise you hear on a windy day in an open mic). It
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>works FB on CW. Checked all the tubes and cleaned the
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>relay. Caps and resistors look good in the V1 the 
first audio.
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>Anyone out there familiar with this rig or who has a 
suggestion?
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>Thanks,&nbsp; Bob, AA8A
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