[Hallicrafters] Audio output transformer for SX-71

[K4PRF - Burton Pratt]

I have an SX-71 with an open primary in the audio output transformer and 
wonder if anyone knows of a universal replacement that would work.  The 
output tube is a single 6K6.  The notes call for a primary impedance of 
7000 ohms and the usual sec. feeding 500 and 3.2 ohms output. 

Thanks es 73,

K4PRF

Burt Pratt