[AMPS] Simulating center tap

[Mark S Graalman]

  Vic,

 Using one side of the transformer for the cathode return will
work, BUT you will introduce hum modulation on the amp
output. Seems to me the usual way was to place two series
connected 33 ohm 2 watt resistors acrossed the transformer
secondary and use the center connection of the two resistors
as the center tap.

Mark  WB8JKR


On Tue, 16 Nov 1999 09:47:10 -0800 Vic Rosenthal <rakefet@rakefet.com>
writes:
>
>I just noticed that the filament transformer I was planning to use 
>(got it free)
>for my 2 x 3-500z amp does not have a center tap.  It has two 5v 20a 
>windings
>which I was going to put in parallel. 
>
>I recall that sometime back there was a thread on the subject of how 
>to simulate
>a center tap on a filament transformer that doesn't have one.  Does 
>anyone
>remember the (haha) consensus of opinion on this?  
>
>What would happen if I just connected the b- return to one side (don't 
>shoot me,
>I'm just asking)?
>
>73,
>Vic, K2VCO
>Fresno CA
>
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