UTM24RN

Description

Ratio: 1:1,
Impedance: 10kΩ : 10kΩ
Frequency response @15Ω source, 600 load: +/- 0.5 dB 15 Hz to 80 kHz (Ap)
Primary Inductance: 10H+10H
Secondary Inductance: 30H
Total DC Resistance PRI: 300Ω
Total DC Resistance SEC: 300Ω
Max Level: @50Hz: +12 dBu
Core Size: EI24, Permalloy
Suitable for Bogner Harlow style FET compressor circuit
Pri1: Grn (+) – Vio (-)
Pri2: Org (+) – Yel (-)
Sec: Red (+) – Blk (-)

UTM24RN Audio Transformer
The UTM24RN is a high-quality audio output transformer designed specifically for the Bogner Harlow style FET compressor circuit and similar analog signal applications. It features a 2:1+1 turns ratio on a Permalloy EI24 core, offering low distortion, excellent magnetic properties, and wide bandwidth performance.
This transformer has been tested and discussed by the DIY community in the following thread, where frequency response characteristics under various load conditions are presented:

https://www.freestompboxes.org/viewtopic.php?t=31756

About Bogner Harlow:
https://www.zikinf.com/manuels/bogner-harlow-manuel-utilisateur-en-65976.pdf