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.
The UTM3501 is a line-level, low-profile output transformer, 150Ω:600Ω, 1:2 ratio. Recommended for any kind of API-ish style output amplifiers. PCB mounted.
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.
The UTM3505 is a line-level, low-profile, output UNGAPPED transformer, 300Ω:600Ω (1:2). Dedicated for UREI 1176, rev F-H, including Gyraf's project. Fits in 500-series modules.
UTM_Catalog2B.pdf 
