Re: [Amps] Getting Filament Voltage on an AL-82

["Bill Turner" <dezrat1242@ispwest.com>]

Actually, the resistors will affect the reading, but if you have a very 
high impedance DVM the effect will be small.  I prefer to not use 
resistors so that I could use any voltmeter I have and not have to 
calculate how far off it would be.  Filament voltages are critical; one 
should strive for as much accuracy as possible.  If you choose to use 
resistors, you should calculate the error introduced so you can 
compensate for it.  Good designers never assume anything.

Feedthrough caps are good if you have them, but as Steve says they may 
be prone to accidental shorts.  Banana jacks are nearly goof-proof.

--
Bill W6WRT


__________________________________________________________


----- Original Message ----- 
From: "Steve Thompson" <g8gsq@ic24.net>
To: <amps@contesting.com>
Sent: Sunday, September 19, 2004 1:40 AM
Subject: Re: [Amps] Getting Filament Voltage on an AL-82


> Put a 1k resistors (even 10k) between the filament pins and the jacks 
> (I
> prefer f/t caps), and you don't have to worry about slipping and 
> shorting
> anything. With a DVM the resistors won't affect the reading.
>
> Steve
>
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> Amps@contesting.com
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