On Jun 28, 2006, at 10:41 AM, Joe Subich, W4TV wrote:
>
> They will certainly arc if the operator is improperly loaded <G>.
>
> However if the amplifier is underloaded, voltage in the output
> "tank" will increase. The "limit" for underloading is operating
> into an open circuit (T/R relay not closed, etc.). If the bandswitch
> is operating close to the limit already (as is the case in some
> amplifiers), overdriving an underloaded amplifier can damage the
> bandswitch.
>
Depends on whether the Tune-C or the bandswitch has the lower BDV.
If the Tune-C arcs at 3600v and the bandswitch arcs at 5000v
(SB-220), the Tune-C protects the bandswitch.
>
> 73,
>
> ... Joe, W4TV
>
>
>
> -----Original Message-----
> From: Gudguyham@aol.com [mailto:Gudguyham@aol.com]
> Sent: Wednesday, June 28, 2006 11:09 AM
> To: w4tv@subich.com; amps@contesting.com
> Subject: Re: [Amps] IM distortion and such
>
>
> In a message dated 6/28/2006 11:04:10 AM Eastern Daylight Time,
> w4tv@subich.com writes:
> By properly loading the amplifier, voltages (including VHF transients)
> in the output circuit would be reduced and the chance of damage to
> the bandswitch would be significantly reduced.
>
> 73,
>
> ... Joe, W4TV
>
> Oh, do you mean to say that bandswitches could arc due to improper
> loading
> by the operator? Lou
>
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>
R L MEASURES, AG6K. 805-386-3734
r@somis.org
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