Transformers & Chokes

The PRC-3 audio choke from One Electron was designed as a plate load for the output of either a high quality line amplifier or a phono preamp.

Molded powdered iron core.
1-1/4 long axial leads.
High inductance & high current.
L measured at 1 Khz. Inductance: 250 µH20% tolerance
DC resistance ohms: .17
Self Resonant Frequency (MHz): 1.5
Maximum DC current amps: 2.5
Coil diameter (in): .43
Core Length (in): 1.25

• Designed for general purpose or replacement use in push-pull tube output circuits. (For single ended use, see our 125 SE series - optimized for single ended tube output circuits).
• Frequency response: 150 Hz. - 15 Khz (± 1db max. ref. 1 Khz).
• Open style with minimum 5" long primary leads, secondary solder lugs for convenient secondary connections.
• Tables provided with transformer listing 90 pre-calculated impedance ratios.

• Designed for general purpose or replacement use (not Hi-Fi), in single ended, tube output circuits.
• Frequency response: 100 Hz. - 15 Khz (± 1db max. - ref. 1 Khz). (For full frequency response (20 Hz. to 20 Khz.) - see P-T1627SE).
• For push-pull output use, see P-T125A - optimized for push-pull tube output circuits.
• Open style with minimum 12" long primary & secondary leads leads.
• All sizes use butt stacked cores (using 29M6 steel) with an air gap, to reduce D.C.

Features

• Economical "open bracket" - channel mount.
• Tolerance of 15% on both inductance & resistance.
• Inductances measured at rated D.C.

• Over designed for single ended tube output circuits (triode, tetrode or pentode tubes).
• Enclosed (shielded), 4 slot, above chassis Type 'X' mounting.
• Frequency response at least 20 Hz. to 20 Khz. at full rated power (± 1 db max. ref.

• Enclosed, 4-hole mount chokes
• Tolerance of 15% on both inductance & resistance.
• Inductances measured at rated D.C. current.
• Minimum 8" long leads.
• Units will exhibit less inductance at slightly higher currents or more at lower currents.
• Perfect for high voltage power supply filtering, case matches power transformers & tube audio output transformers.
• Units are vacuum impregnated with polyurethane varnish for quiet and long life operation.
• For more sizes and voltages (open - bracket mount type) - see P-T154-P-T156-X
• Operating temperature range is -40C to 85C

Replacement for Fender Champ, Vibro Champ, Princeton, Princeton Reverb, Tweed Deluxe Equivalent to Fender part number 125P1B & 022772 Primary:120 VAC, 60 Hz. For 240V version, see P-T290AEX Features:

• Designed for drop in replacement of original units.
• Physically, parts were designed to look similar to original factory units (where possible).
• Plastic Core
• Material used & design specs. were kept as close as possible to the original part to preserve the stock "tone".

Warning: Not all amplifier models of the same name use the same transformer model. Please make sure the amplifier transformer which you are replacing has a Fender number matching the equivalent Fender transformer number listed here.

Replacement filter choke for Marshall JCM800s.

The PRC-1 audio choke from One Electron was designed for shunt-feed single-ended output applications, but is also useful where quality inductive loads are needed or as high-quality filter chokes.

The PRC-2 audio choke from One Electron was designed for shunt-feed single-ended output applications, but is also useful where quality inductive loads are needed or as high-quality filter chokes.

Replacement for Fender Deluxe, Deluxe Reverb, Vibrolux, Vibrolux Reverb Equivalent to Manufacturer part number 125C3A & 022707 Specifications: Inductance ± 15% 4 H D.C. Current 50 mA Features:

• Designed for drop in replacement of original units.
• Physically, parts were designed to look similar to original factory units (where possible).
• Inductances measured at rated D.C. current.
• Material used & design specs. were kept as close as possible to the original part to preserve the stock "tone".
• Units are vacuum impregnated with polyurethane varnish for quiet and long life operation.

Replacement for Fender Bandmaster, Dual Showman, Pro Reverb, Twin Super Equivalent to Manufacturer part number 125C1A & 022699 Specifications:

• Inductance ± 15%: 4 H
• D.C. Current: 90 mA

Features:

• Designed for drop in replacement of original units.
• Physically, parts were designed to look similar to original factory units (where possible).
• Inductances measured at rated D.C. current.
• Material used & design specs.

Replacement for Marshall Plexi JCM 800.


Inductance ± 15%
40 H


D.C. Current
50 mA


Features:

• Designed for drop in replacement of original units.
• Physically, parts were designed to look similar to original factory units (where possible).
• Inductances measured at rated D.C. current.
• Material used & design specs. were kept as close as possible to the original part to preserve the stock "tone".
• Units are vacuum impregnated with polyurethane varnish for quiet and long life operation.

Replacement for Vox AC30 reissue


Inductance ± 15%
5 H


D.C. Current
150 mA


Features:

• Designed for drop in replacement of original units.
• Physically, parts were designed to look similar to original factory units (where possible).
• Inductances measured at rated D.C. current.
• Material used & design specs. were kept as close as possible to the original part to preserve the stock "tone".
• Units are vacuum impregnated with polyurethane varnish for quiet and long life operation.

Replacement for Vox AC30 vintage


Inductance ± 15%
30 H


D.C. Current
100 mA


Features:

• Designed for drop in replacement of original units.
• Physically, parts were designed to look similar to original factory units (where possible).
• Inductances measured at rated D.C. current.
• Material used & design specs. were kept as close as possible to the original part to preserve the stock "tone".
• Units are vacuum impregnated with polyurethane varnish for quiet and long life operation.

Replacement for Fender Twin, Super, and Dual Showman. Equivalent to #125C1A & #022699.

Replacement for Fender Deluxe and Vibrolux. Equivalent to #125C3A & #022707.

Replacement for Marshall Plexi Specifications:

• Inductance ± 15%: 3 H
• D.C. Current: 250 mA

Features:

• Designed for drop in replacement of original units.
• Physically, parts were designed to look similar to original factory units (where possible).
• Inductances measured at rated D.C. current.
• Material used & design specs. were kept as close as possible to the original part to preserve the stock "tone".
• Units are vacuum impregnated with polyurethane varnish for quiet and long life operation.