Transformers & Chokes

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

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

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

Capacity: 500VA Features:

• Single winding does not provide isolation, for use where equipment is already isolated and only voltage change is required.
• World wide applications, 50 or 60 Hz.

• Dual primary 115/230 VAC
• 50/60 Hz. operation
• Dual secondaries for series or parallel connections
• 4,000 V RMS Hipot test
• Class F insulation (155 degrees, C)
• Chassis mount
• Dual bobbin construction
• Dual use terminals
• C UL US recognized (E207860)
• TUV Type Approved
• CE certified to IEC 950 (Approved to EN 60-742 Safety Isolating Transformers)

• Single Primary 115VAC
• Operates on 50/60 Hz.
• Combination solder or quick connect terminals.
• Split bobbin construction eliminates the need for an electrostatic shield.
• Hi-pot tested to 2 KV RMS.
• Economical open style, channel frame - chassis mount design
• UL recognized & CSA certified.

• 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

Size: 48 VA
Secondary Series: 40V C.T. @ 1.2A
Secondary Parallel: 20V @ 2.4 A
Features:

• Low profile mounting, dual - split bobbin design.
• Low primary to secondary coupling, balanced windings, no electrostatic shield required and low EMF radiation due to semi-toroidal design.
• Universal dual primary 115/230V - 50/60 Hz.
• High insulation - Hipot of 1,750V RMS.
• Class B insulation - 130 degrees C.
• C UL US recognized.

• Universal primary with taps for 100, 120, 220 or 240 VAC, 50 / 60 Hz. (Except the 260A6 which is 117V, 50/60 Hz only)
• Designed for preamps, low power amps, general replacement, test equipment, etc.
• Economical, open frame, chassis mount - two hole (.187 dia. = G) channel bracket (figure #1) or four hole mounting (figure #2).
• Units include a Faraday shield between the primary and secondary windings. Our electrostatic shield reduces the capacitive coupling from the primary - greatly attenuating higher frequency current coupling to the secondaries.
• Minimum 5" long leads.
• For more selection check out our P-T300-X series of universal plate & filament transformers.

• Primary 115 VAC, 60 Hz.
• Designed for small power or bias supplies, test equipment, preamps etc.
• Models P-T261C6, P-T261E6, and P-T261G6 can also be used with full wave C.T. rectifiers.
• Economical , two hole, channel bracket, chassis mount.
• Minimum 5" long leads.
• Convenient 6.3 filament/auxiliary winding.

• Primary 115 VAC, 60 Hz.
• Designed for small power or bias supplies, test equipment, preamps etc.
• Economical , two hole, channel bracket, chassis mount.
• Minimum 5" long leads.
• Convenient 12.6 filament/auxiliary winding.

• Vertical Mount. For Horizontal Mount, see P-T263-Z
• Primary 115 VAC, 60 Hz. - except as noted
• Enclosed, 4 hole, chassis mount.
• Minimum 6" long leads.
• Units can be run full wave bridge or full wave C.T.
• Class A insulation (105 degrees C).
• Hi-Pot test of 2,000V RMS.
• Conservative designs - CSA certified (209651).

• Horizontal mount. For Vertical Mount, see P-T263-X
• Primary 117 VAC, 50/60 Hz. - except as noted
• Enclosed, 4 hole, chassis mount.
• Minimum 6" long leads.
• Units can be run full wave bridge or full wave C.T.
• Class A insulation (105 degrees C).
• Hi-Pot test of 2,000V RMS.
• Conservative designs - CSA certified (209651).
• For Vertical Mount, see P-T263-X

Specifications:

• Size: 7 VA
• Dual Primary: 117 VAC, 234VAC, 50/60 Hz.
• Secondary VAC RMS Series: 14V @ 0.5 A
• Secondary VAC RMS Parallel: 7V @ 1 A

Features:

• Primary 117/234 VAC, 50/60 Hz.
• Dual secondaries
• Secondaries can be used as; a center tapped secondary, parallel connected or used individually
• Units are designed for use with all windings engaged.
• Open style.
• Minimum 6" long leads.
• Dual bobbin design - no electrostatic shield required.
• Class B insulation (130 degrees, C) for extra p

Specifications:

• Size: 18 VA
• Dual Primary: 117 VAC, 234VAC, 50/60 Hz.
• Secondary VAC RMS Series: 36V @ 0.5 A
• Secondary VAC RMS Parallel: 18V @ 1 A

Features:

• Primary 117/234 VAC, 50/60 Hz.
• Dual secondaries
• Secondaries can be used as; a center tapped secondary, parallel connected or used individually
• Units are designed for use with all windings engaged.
• Open style.
• Minimum 6" long leads.
• Dual bobbin design - no electrostatic shield required.
• Class B insulation (130 degrees, C) for extra

Specifications:

• Size: 14 VA
• Dual Primary: 117 VAC, 234VAC, 50/60 Hz.
• Secondary VAC RMS Series: 14V @ 1 A
• Secondary VAC RMS Parallel: 7V @ 2 A

Features:

• Primary 117/234 VAC, 50/60 Hz.
• Dual secondaries
• Secondaries can be used as; a center tapped secondary, parallel connected or used individually
• Units are designed for use with all windings engaged.
• Open style.
• Minimum 6" long leads.
• Dual bobbin design - no electrostatic shield required.
• Class B insulation (130 degrees, C) for extra pr

Specifications:

• Size: 48 VA
• Dual Primary: 117 VAC, 234VAC, 50/60 Hz.
• Secondary VAC RMS Series: 48V @ 1 A
• Secondary VAC RMS Parallel: 24V @ 2 A

Features:

• Primary 117/234 VAC, 50/60 Hz.
• Dual secondaries
• Secondaries can be used as; a center tapped secondary, parallel connected or used individually
• Units are designed for use with all windings engaged.
• Open style.
• Minimum 6" long leads.
• Dual bobbin design - no electrostatic shield required.
• Class B insulation (130 degrees, C) for extra p

Specifications:

• Size: 48 VA
• Dual Primary: 117 VAC, 234VAC, 50/60 Hz.
• Secondary VAC RMS Series: 16V @ 3 A
• Secondary VAC RMS Parallel: 8V @ 6 A

Features:

• Primary 117/234 VAC, 50/60 Hz.
• Dual secondaries
• Secondaries can be used as; a center tapped secondary, parallel connected or used individually
• Units are designed for use with all windings engaged.
• Open style.
• Minimum 6" long leads.
• Dual bobbin design - no electrostatic shield required.
• Class B insulation (130 degrees, C) for extra pr

Specifications:

• Size: 15 VA
• Dual Primary: 117 VAC, 234VAC, 50/60 Hz.
• Secondary VAC RMS Series: 5V @ 3 A
• Secondary VAC RMS Parallel: 2.5V @ 6 A

Features:

• Primary 117/234 VAC, 50/60 Hz.
• Dual secondaries
• Secondaries can be used as; a center tapped secondary, parallel connected or used individually
• Units are designed for use with all windings engaged.
• Open style.
• Minimum 6" long leads.
• Dual bobbin design - no electrostatic shield required.
• Class B insulation (130 degrees, C) for extra p

Specifications:

• Size: 50.4 VA
• Dual Primary: 117 VAC, 234VAC, 50/60 Hz.
• Secondary VAC RMS Series: 12.6V @ 4 A
• Secondary VAC RMS Parallel: 6.3V @ 8 A

Features:

• Primary 117/234 VAC, 50/60 Hz.
• Dual secondaries
• Secondaries can be used as; a center tapped secondary, parallel connected or used individually
• Units are designed for use with all windings engaged.
• Open style.
• Minimum 6" long leads.
• Dual bobbin design - no electrostatic shield required.
• Class B insulation (130 degrees, C) for ex

Specifications:

• Size: 37.8 VA
• Dual Primary: 117 VAC, 234VAC, 50/60 Hz.
• Secondary VAC RMS Series: 6.3V @ 6 A
• Secondary VAC RMS Parallel: 3.15V @ 12 A

Features:

• Primary 117/234 VAC, 50/60 Hz.
• Dual secondaries
• Secondaries can be used as; a center tapped secondary, parallel connected or used individually
• Units are designed for use with all windings engaged.
• Open style.
• Minimum 6" long leads.
• Dual bobbin design - no electrostatic shield required.
• Class B insulation (130 degrees, C) for e

Primary 115 VAC 60 Hz.
Secondary DC current measured with cap. input filter, full wave (two diode) C.T., rectifier circuit.
Enclosed, 4 hole chassis mount.
Minimum 6 long leads.
2" X 2" vertical mounting centers.
Class A insulation (105 degrees C).
Hi-Pot test of 2000 V RMS.
Conservative designs - CSA certified (# LR3902).
3.2lbs
Secondary: 250-0-250 V100 mA
Filament winding 1: 5 V2 A
Filament winding 2: 6.3 V3 A

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

Part No.
Primary
Ampeg Model Names
Ampeg Part No
Bobbin/Paper Wound


VAC
Hz.




P-T291GX
120 V
60 Hz.
B25
12XA
Bobbin


P-T290CAZ
117 V
60 Hz.
Gemini VI 25W
PT 113
Bobbin


P-T290ETX
120 V
60 Hz.
Super Echo Twin
PT 109
Bobbin


P-T291HX
110 / 115 / 230 V
50 / 60 Hz.
V50H
94-270-030
Bobbin

• Designed for drop in replacement of original units.
• Physically, parts were designed to look similar to original factory units (where possible).
• Material used & design specs. were kept as close as possible to the original part to preserve the stock "tone".
• See P-T290-FENDER-120-UP for upgraded 120 V transformers, P-T290-FENDER-240 for 240 V transformers

Warning: Not all amplifier models of the same name use the same transformer model.