The UTM2581 is a line level to high impedance tube stage input transformer. It works perfectly as a Vari Mu input transformer with the secondary CT. 600:15CTk, 1:5 ratio.
The UTM3590 is a Single Ended tube output transformer, 9.6k:600, 8:1, 4:1 or 2:1 ratio. GAPPED. Recommended for tube preamp projects like RCA BA-2C.
Clamped and open frame option available.
This is 1:9.1 mic or line input, high ratio, 600:50k, transformer. Recommended for vintage Teletronix LA2A and UA175. Also suitable as a high-ratio input transformer with high level capability for...
The UTM3504 is a line-level, low-profile output GAPPED transformer, 600Ω:600Ω:600Ω:FB (1:1:1:FB). Dedicated for UREI 1176, rev A-E. Suitable for 500-series modules.
UTM_Catalog2B.pdf 
