VINTAGE RECORDING AMPLIFIER TRANSFORMERS A to K

Fully shrouded with colour coded leads. WW Primary 120,110 V Twin winding. 110V at 30 mA, 22 V CT 0.5 A.
Generously designed mains transformer with low loss M6 core for this easy to make high performance microphone amplifier. See also input type 4935 and output type 8940. Circuits available.

Fully shrouded with colour coded leads. WW Primary 120,110 V Twin winding. 117V at 100 mA, 6.3 V CT 1.8 A. Electrostatic shield for power line noise supression.
Generously designed mains transformer with low loss M6 core for this easy to make high performance compressor. Circuits available. Size "E" Fully shrouded.

Replacement for AP2622 . Primary has 2 equal 150 ohm windings which can be used in series or parallel for 600/150 ohms input. ratio 1:4.4 or 1:8.8. 100% mumetal core and can. 34 mm dia 24 mm high. Colour coded leads or optional PCB pins. Please note this is electrically equivalent but has a different pin arrangement and will not fit on the original PCB.

Replacement for API 2503-1/2. 4 identical 75ohm windings quadrifilar wound. A multipurpose transformer with an incredible HF response. +30 dBu output at 30 Hz configured as 1:2

Single ended line output for Ampex 350. Single ended output for 6F6 tube. Max 15 mA dc. Output can be strapped for 150 or 600 ohms. Fully shrouded size "D" with colour coded leads. Circuit available on request. Weight 1.0 Kg.

Push-Pull line output. Ratio 5.55CT:1CT:1. Separate winding for negative feedback. Total dc resistance referred to primary 1500 ohms. Max imput level +38 dBu. Fully shrouded package size SA. Colour coded leads.

Ratio 1+1:32. Input can be configured for 50 or 200 ohms. 100% Mumetal core and can. Colour coded leads. Size E normally shipped as Style f as illustrated. Octal base or threaded grommet options. Replaces type 9735

Ratio 1 : 10 with tap at 50 Ohms. Can be configured for 50 or 250 or 600 ohms. 100% Mumetal core and can. Colour coded leads. Size E normally shipped as Style f as illustrated. Threaded grommet option.

Replacement input transformer for the Germanium desk. Primary has balanced taps for 30/200/600 Ohms. Secondary 600 Ohms. Package size J can 45 dia x 52.5 high with threaded mounting grommet.

Recording quality microphone transformer designed for this excellent amplifier originally used by the Beatles at Abbey Road. Ratio 1:3.16 with -5 dB, -10 dB and -15 dB secondary taps. Very large 100% Mumetal core and thick Mumetal can. Colour coded leads. Primary inductance 15H approx -0.5 dB at 8 Hz with 200 ohm microphone. Can size 45 mm dia 52.5 mm high mounting grommet (Type 1295E) or 2 x M3 holes (Type 1295 I).

100% Mumetal output transformer ratio 1:1.77. Total DCR referred to secondary 160 Ohms aprox. Max level +18dBu at 20 Hz
Can size 45 mm dia 52.5 mm high mounting grommet (Type 1365E) or 2 x M3 holes (Type 1365 I).

Recording quality microphone transformer designed for this excellent amplifier originally used by the Beatles at Abbey Road. Ratio 1:7 with 35% secondary tap. Very large 100% Mumetal core and thick Mumetal can. Colour coded leads. Primary inductance 15H approx -0.5 dB at 8 Hz with 200 ohm microphone. Can size 45 mm dia 52.5 mm high mounting grommet (Type 9970E) or 2 x M3 holes (Type 9970I). Tested with Drip Electronics "Four Seven" PCB.

Recording quality output transformer designed for this excellent amplifier originally used by the Beatles at Abbey Road. The design is based on the original but with our enhancements. Ratio 7:1+1. 10K/200+200 ohms. Normally used with secondary windings in parallel to give a +18 dBu at 20 Hz but may be series connected for +26 dBu at 20 Hz. Very large 50% Mumetal 50% M6 core for high output level, ultra low distortion and exceptional dynamic range. Mumetal can. Colour coded leads. Bandwidth 10 Hz to 50 kH. Can size 45 mm dia x 52.5 mm high mounting grommet (type 9980E) or 2 x M3 holes (type 9980I . Tested with Drip Electronics "Four Seven" PCB.

Ratio 1:6 300/10k Ohms. Suitable for Series 3 and possibly other models. Mumetal can 34 dia. x 24 high with colour coded leads.

Ratio 1:10 with tap for 1:1 Max input level +9dBu. Sowter designed transformer replacement for the original Lustraphone transformer. Internal electrostatic shield to ensure good common mode noise rejection. Mumetal can 34 mm diameter with package options.

Fully shrouded with colour coded leads.Size "J". WW Primary 120,110 V Twin winding. Electrostatic screen.
250-0-250 at 60 mA. 6.3 V CT @ 1.5 A. 6.3-5-0 V @ 1.0 A for rectifier and pilot light. Generously designed mains transformer with low loss M6 core will power 1 or 2 channels. 50/60 Hz
Larger than original but still fits on chassis with minor modification

Ratio 1:2 CT. Max input level +20 dBu. Sowter designed transformer similar to Triad HS-29. (1:2CT configuration only) Internal electrostatic shield to ensure good comon mode rejection for accurate phase splitting at high frequencies. Mumetal can with colour coded leads. Mounting options. Tested with Drip EPQ1A (9330E choose threaded grommet type ).

Ratio 10CT:1+1 4% NFB. Max output level +23 dBu. Total dc resistance 40 ohms ref secondary. Can be configured for 600 or 150 ohm secondary. 50% Mumetal core for exceptional bandwidth. Colour coded leads.

Ratio 10CT:1+1 4% NFB. Max output level +23 dBu. Total dc resistance 40 ohms ref secondary. Can be configured for 600 or 150 ohm secondary. 50% Mumetal core for exceptional bandwidth. Mumetal can with threaded grommet.
Tested with Drip EPQ1A (9530E)

For replacement or recreation of this rare reverb unit. Interfaces between the plate and amplifier. Ratio 1:35. Mumetal core in Mumetal can 26 mm dia x 20 mm high with colour coded leads.

Ratio 9:1. Sowter designed transformer similar to Neumann U1 with a single secondary winding. Internal electrostatic shield to ensure good common mode rejection. Mumetal can with colour coded leads 34 mm dia. x 24 high.