[AMPS] Re: Filament Xfmr.

[Larry Molitor]

At 11:39 AM 10/3/99 -0500, you wrote:
>
>About:
>
>"I am building an amp with four 3-500Z using low bands only (160 and
>80m).
>I do have two filament transformers, 5V/80A w/o a center tap on the
>secondary coil. The other one contains four coils with 5V/25A ea. coil
>also
>w/o any center taps on the secondary side."  (Etc.)
>
>How about connecting a small "audio" or "power supply" choke from each
>side of the secondary to "eventual" ground? Calculate the inductance
>value of them so that they will only allow a negligible (AC) current
>flow to ground while maintaining a balanced condition for all voltages
>involved in the circuits. I think reasonable sized, cheap chokes may be
>possible but must have low DC resistances. Maybe from junk box.
>
>73,    Roy         K6XK

I use a small filament transformer with a secondary center tap. Connect the
secondary across the big transformer secondary. Leave the primary open. Use
the small transformer secondary center tap for your cathode return.



73,

Larry - W7IUV
w7iuv@arrl.net
http://www.axtek.com/w7iuv
Amp pix at http://207.108.137.61



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