Vic:
Right on! I was ignorant of that little bit of information.
In which case:
>>> This will not work. Don't do it.
- JimT
----- Original Message -----
From: "Vic K2VCO" <vic@rakefet.com>
To: "Jim Tonne" <tonne@comcast.net>
Cc: "Tom W8JI" <w8ji@w8ji.com>; <w2cqm@juno.com>; <amps@contesting.com>;
"Norman Hockler" <sanorm@columbus.rr.com>
Sent: Friday, February 02, 2007 11:04 AM
Subject: Re: [Amps] How best to reduce filament voltage?
> Jim Tonne wrote:
>> Tom wrote:
>>
>>> This will not work. Don't do it.
>>
>> in reply to
>>
>>>> Install a resistor on the primary side of the transformer.
>>
>> which is what I would have suggested.
>>
>>> It will totally hose the voltage regulation under load,
>>
>> The load is constant so "regulation" in the usual sense
>> (same output voltage with varying load value) is not an
>> issue. A series resistance would limit inrush. A series
>> resistance at the transformer primary would limit inrush
>> to the transformer as well.
>
> Tom is assuming that everyone knows that the transformer in the SB1000 is
> used for BOTH plate and filament supply. The resistor would screw up the
> regulation of the plate voltage.
>
> --
> 73,
> Vic, K2VCO
> Fresno CA
> http://www.qsl.net/k2vco
>
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