Bob's Devices Cinemag 1131 SUT. Used with Dynavector Karat 17D3 with excellent results; no longer necessary due to cartridge and preamp upgrades.
From Bob's website:
Ultra High quality
laminations, lower inductance and superior sound. These transformers
were especially designed and tested with several low-output moving coil
cartridges. These are very difficult transformers to construct and
require a precision manufacturing process that can only be done by David
Geren at CineMag.
Includes premium construction with C&K Brand Silver contact toggle switches, and Deluxe Gold Plated RCA jacks.
These specially designed transformers
are wired to connect a moving coil cartridge (on a turntable) to a
phono preamplifier, phono input of a receiver, or your preamp's phono
Switchable for 1:20 (26 dB gain) or 1:40 (32 dB gain).
Into a standard 47k phono
preamp, the effective input impedance of the low gain (1:20 ratio) is
118 ohms. At 1:40, the effective input impedance is 29 ohms.
The 1:40 ratio is perfect for those extremely low output cartridges including some by Audio Notes and Ortofon SPU.
Insured shipping and fees covered at asking price; otherwise buyer responsible for shipping and fees - please contact before making payment. Also available for local pickup.