[HBR] Re: GB> Looking For a Specific Part...

[N2EY at aol.com]

In a message dated 6/11/06 3:09:41 PM Eastern Daylight Time, 
gswynar at durham.net writes:


> I have all of the parts, with but one singular exception, i.e. the 1:3 
> audio interstage transformer which is used to drive the final modulator tube.

An idea:

Perhaps an old power transformer could be used. If we have, say, a 540 VCT 
(270-0-270) secondary, the primary-to-secondary turns ratio is about 1 to 4.9. 
Primary to half secondary is about 1 to 2.45.

Minor adjustments in ratio can be made by putting the filament windings in 
series or parallel.

If the single-ended driver stage draws significant plate current, it may be 
worthwhile to restack the laminations with an air gap rather than interleaved.

Of course even a small power transformer probably has a lot more iron and 
copper than is needed, but that won't hurt anything.

Just an idea - I haven't tried it out.

73 de Jim, N2EY