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.
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.