Need help finding specs for old Calectro audio transformer

[sunbonnet55]

Does anyone out there have an old Calectro catalog that has the specs to a D1-711 audio transformer? It's got a center-tapped primary and single secondary.

Thanks,

Steve M.

 

[Audioguru]

What are you making that needs an old audio transformer? An antique vacuum tubes amplifier?

 

[Audioguru]

A newer solid state amplifier might have used your old transformer 67 years ago:

 

[sunbonnet55]

What are you making that needs an old audio transformer? An antique vacuum tubes amplifier?

It's from an old 20 meter homebrew receiver that I'm repairing. The Calectro D1-711 is what is installed on the board, It's the output transformer of a single balanced direct conversion mixer. I finally pulled to the transformer off the board and measured its parameters with an LCR meter. At 1 kHz, looks like 3 KΩ primary (left coil) and 15KΩ secondary. The circuit is from the April 1978 issue of QST.