[Amps] Regulated filament current

[Radio WC6W]

Hi Bob,
   You may find this link of interest:

http://qsl.net/wc6w/wc6wamps/index.html?fr63.html

73 & Good morning,
   Marv WC6W 

--------------------------------------------
On Thu, 9/3/15, nemo zilch <nemozilch at gmail.com> wrote:

 Subject: [Amps] Regulated filament current
 To: "amps at contesting.com" <amps at contesting.com>
 Date: Thursday, September 3, 2015, 3:40 PM
 
 I am slowly building an amp for hf
 using a GS35B.  For several reasons I
 decided to feed the filaments with current regulated d.c. I
 have the
 circuit all designed and it regulates well.  But the
 question is what
 current should I use?  The spec sheet for the tubes
 gives a range of
 current to be expected when using the specified 12.6 volts
 for the
 filaments.  I suppose that there is some variation in
 filament current draw
 from tube to tube.   My inclination is to
 adjust the current so that the
 voltage across the tube is 12.6 volts.  Does this seem
 like the correct
 thing to do?
 Bob W4AOS
 
 
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