VINTAGE COMPRESSOR TRANSFORMERS J to Z

Sowter replacement for B11148. Pro Audio Size K. Package options.

Ratio 5:1. 15k/600 ohms output transformer for driving balanced line from ac coupled cathode follower or SRPP circuit. Total dc resistance ref secondary 31 ohms. Colour coded leads and threaded grommet mounting. Max output level +30 dBu. 30% Mumetal core for exceptional bandwidth and dynamic range. Similar to UTC A24 and Triad HS-50 (in overall 5:1 configuration) but with improved bandwidth. Suitable for Drip Electronics Opto 4 and 5 PCB. Also suitable for UE-100 Output.
This transformer is very similar to type 1010 and is essentially a size and cost reduced version achieved by using a smaller lamiination size and a smaller proportion of Mumetal laminations. The can size is also smaller and less expensive. The performance is unaffected except at very high level low frequencies where the THD measures somewhat higher.

Ratio 5:1. 15k/600 ohms output transformer for driving balanced line from ac coupled cathode follower or SRPP circuit. Total dc resistance ref secondary 30 ohms. Colour coded leads (Type 1010A) or PCB pins (Type 1010B). Size A. Max output level +30 dBu. 50% Mumetal core for exceptional bandwidth and dynamic range. Similar to UTC A24 and Triad HS-50 (in overall 5:1 configuration) but with improved bandwidth. Fits Drip Electronics OPTO 4 PCB. Pro Audio Size K.

600 ohm to 50K input transformer ratio 1:9.1 Bandwidth 5Hz to 30 kHz. Similar to UTC A10. Mumetal can with side entry colour coded leads Threaded Grommet (Type 1449E) or PCB pins (Type 1449C). Suitable for Drip Electronics Opto 4, Opto 5 and UA 175b PCBs.

Power transformer for Teletronix LA-2A Compressor.
2 x 120,110 V Primary. 250-0-250 at 40 mA. 6.3V CT at 2 A. Internal electrostatic shield for reduction of noise caused by power line transients. Fully shrouded package. Size "F". Tested with Drip Electronics OPTO4 PCB

Power transformer for Teletronix LA-2A Compressor.
240, 220, 200, 0, -10 Primary. 250-0-250 at 40 mA. 6.3V CT at 2 A. Internal electrostatic shield for reduction of noise caused by power line transients. Fully shrouded package. Size "F". Tested with Drip Electronics OPTO4 PCB

Ratio 3:1. 5k/600 ohms output transformer for driving balanced line from ac coupled cathode follower or SRPP circuit. Total dc resistance ref secondary 17 ohms. Colour coded leads (Type 8940A) or PCB pins (Type 8940B). Size A. Max output level +29 dBu. 50% Mumetal core for exceptional bandwidth and dynamic range. Suitable for Altec 1566a. Tested with Drip Electronics OPTO4 PCB where it should be used in conjunction with type 4383 input transformer.

High performance transformer for repair or reconstruction of the RCA BA-6A Compressor. Hybrid core (30% Mumetal 70% M6) transformer in Mumetal can. Will fit into original 78 x 100 mm can. Impedance ratio 10k CTK/10k. Colour coded leads.

High performance configurable transformer for repair or reconstruction of the RCA BA-6A Compressor. Ratio 600/150 CT: 10K. Max input level (600 ohm configuration) +16 dBu. Colour coded leads.

Replacement output transformer for RCA BA-6A limiting amplifier. Push-Pull 6V6 8000 ohms to 600 ohms. Full geometric balancing. 10 separate winding sections for excellent bandwidth and transient response. Size "K" fully shrouded construction. Colour coded leads.

High performance transformer for repair or reconstruction of the RCA 86-AL or 86-A Compressor. 30% Mumetal 70% M6 core transformer in Mumetal can. Will fit into original 78 x 100 mm can. Impedance ratio 10k+10k/20k. Colour coded leads.

Ratio 1:1.58 200/500 Ohms. Sowter designed transformer non configurable replacement for the original UTC O-12 transformer. Max level +14 dBu at 50 Hz. Internal electrostatic shield to ensure good comon mode noise rejection. Mumetal can 34 mm diameter with colour coded leads. Optional threaded mounting boss or PCB pins.

600/150+150 with 600 and 1.3 Ohm feedback windings. Replacement for UA-5002. Tested with the 1176 Rev D compressor. Gapped M6 core. Colour coded leads. Size B

15k/185 ohm output transformer for driving a balanced ohm line from push-pull 6SN7, ECC83 etc. 50% Mumetal core for high bandwidth and dynamic range, Max output level at 50 Hz +28 dBu (19 volts). Total dc resistance ref secondary 14 ohms. Colour coded leads. Pro Audio Size K. Tested with Drip Electronics UA 175b PCB .

15k/185 ohm output transformer for driving a balanced ohm line from push-pull 6SN7, ECC83 etc. 50% Mumetal core for high bandwidth and dynamic range, Max output level at 50 Hz +28 dBu (19 volts). Includes primary taps for UA 176. Total dc resistance ref secondary 14 ohms. Colour coded leads. Pro Audio size K
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High performance transformer for repair or reconstruction of the Universal Audio UA175a or UA175b Compressor. Radiometal (50% Nickel) transformer in Mumetal can with threaded grommet. 52.5mm x 45 mm dia. Voltage ratio 2.3:1. Impedance ratio 80k/15k. Similar to UTC A19 but with improved bandwidth. Colour coded leads. Tested with Drip Electronics PCB.

General purpose. Configurable as a 1:10 step-up for mic up to 200 Ohms or 1:5 for a 600 Ohm line or Mic input. High performance Suitable for Urei LA3A line input replacement for B11178. Total dc resistance 75 ohms referred to primary. Max level +12 dBu. Package options.

Sowter decign for this application. Replacement for B11178. Step up ratio 1:10.

High performance transformer for repair or reconstruction of the Telefunken U73b compressor. Some would say it is the European version of the Fairchild 670. 100% Mumetal core with full geometric balance, Mumetal can with threaded grommet. 52.5mm x 45 mm dia. Impedance ratio 15K/15K with separate half primary windings and a CT secondary. Lp = 90H Rp= Rs = 200 Ohms. Colour coded leads.