Interstage transformer specs

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tardishead

Well-known member
Joined
Aug 11, 2004
Messages
623
I need an interstage transformer for a tube phase swing vibrato circuit. The article specifies the transformer like this

"The transformer can be any unit with a suitable primary impedance and fairly low secondary impedance centre tapped. Among standard commercial units a Stancor A-4723 is suitable.This is a 10,000ohm plate to push pull grids unit with turns ratio of 3:1 of the primary to half the secondary."

The Stancor 4723 is rated for 30ma DC on the primary. In the schematic it is connected to the plate of a 6SN7 so I think this DC is overated on the 4723. 10-15ma is fine I presume.

Correct me if I am wrong but I calculate the secondaries to be approx 1000ohm + 1000ohm.
Does anyone know anything available that is close to these specs??
 
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