[Amps] Filament transformer needed

[Jeff Blaine]

Glen,

You may want to rethink that headroom.  The transformer will tend to have a bit higher voltage if running at less than rated load. 
And higher than optimal fil voltages equate to shorter tube life.  In addition, there is less inrush trama to the filament if you 
have a matched transformer.  I think the latter is subject to some debate however.

In any event, you would want to trim the actual fil voltage with a series resistor for max life.

73, Jeff ACØC
www.ac0c.com

-----Original Message----- 
From: Glen Zook
Sent: Tuesday, May 24, 2011 10:37 PM
To: amps at contesting.com
Subject: [Amps] Filament transformer needed

I need a 12.6 VAC @ around 10 amps filament transformer for my pair of GS-31b linear.  The tubes require a total current of just 
under 7 amps so I would like a little "headroom".  I would prefer a 220 VAC primary since I am planning on running the amplifier 
from 220/240.  However, I can use a 120 VAC without any problems.

Have various things to trade or, heaven forbid ( :>) ), actual cash!

Glen, K9STH

Website:  http://k9sth.com
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