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[AMPS] SB-220 TUNE Cap Arcing

To: <amps@contesting.com>
Subject: [AMPS] SB-220 TUNE Cap Arcing
From: bnorell@lge.co.kr (Norell Bennett W.)
Date: Tue, 13 Oct 1998 16:30:08 EST
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> Subject: Re: [AMPS] SB-220 TUNE Cap Arcing
To: <amps@contesting.com>
> Date: Tue, 13 Oct 98 15:35:21 -0000
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> From: Jon Ogden <jono@enteract.com>
> To: "Norell  Bennett W." <bnorell@lge.co.kr>
> cc: "amps@contesting.com" <amps@contesting.com>
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> 
> >I haven't had a chance to tune up to see any difference yet.
> >If arcing still occurs, and if it is possibly parasitics
> >at 110MHz as Rich comments, what can be done?
> 
> If the supressor resistors are OK, then my bet is that they are working 
> fine and you don't have parasitics.  You already have nichrome wires in 
> there so adding Rich's wouldn't do anything for you.
> 
> Carl, KM1H, suggested removing all of the mods you did and seeing how 

it 
> works.  Perhaps something is amiss with them.  If something is not 
> assembled correctly on the input circuitry, you could be creating an 
> instability there as well.  This is probably not a bad idea.  Then 
> reinstall the mods one at a time and try to determine where the problem 
> occured.
> 
> Hope this helps.
> 
> 73,
> 
> Jon
> KE9NA
> 
> 
> 
Jon,
I read that Carl suggested removing mods to go "original",
but following the input circuit changes per Rich's suggestions
to reduce VSWR (reducing coil windings and changing in/out caps)
is pretty hard to undo. The VSWR is reduced dramatically, so 
I don't know if the problem lies there.
Thanks for the thoughts.
Bennett
ko2ok

-------------------------------------------------------------------------

-
> Jon Ogden
> 
> jono@enteract.com
> www.qsl.net/ke9na
> 
> "A life lived in fear is a life half lived."
> 
> 

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