HoHo!
A look at your 1928 ARRL Handbook will show you that Xmas tree lamps are
just the thing to make a resistive centre tap fpr your filament transformer!
73
end
Barry Kirkwood PhD ZL1DD
Signal Hill Homestay
66 Cory Road
Palm Beach
Waiheke Island 1240
NEW ZEALAND
www.waiheke.co.nz/signal.htm
----- Original Message -----
From: <nospam4me@juno.com>
To: <amps@contesting.com>
Sent: Wednesday, 28 February, 2001 5:13 PM
Subject: [AMPS] add a Filament Xfmr center tap.
>
> Bruce,
> -
> A pair of low value resistors, from each side of the winding
> to ground make a center tap. One 10 to 20 ohm resistor
> on each side to ground worked for me in a past project.
> You get heat as a tradeoff.
> -
> You can also parallel another transformer secondary
> with the main xmfr.
> -
> I see other have chimmed in with similar thoughts. I have
> tried both methods and they work just fine.
> -
> cheers
> skipp
> http://sonic.ucdavis.edu
> -
> [snip]
> --------- Forwarded message ----------
> From: "Bruce Plantin" <plantin@tcomlp.com>
> To: amps@contesting.com
> Hi all,
> Is it possible to use non-center tapped filament xfmr
> with a thoriated-tungstun filament RF amplifier tube?
> Thanks in advance.
> Bruce W3BP
>
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