Guitar Amp Power Transformer Replacements

Author: Kevinm  Date Posted:14 August 2017 

Top quality power transformers designed by Hammond and recommended by Evatco

  • Designed for drop-in replacement of original units.
  • Physically, parts were designed to look similar to original factory units (where possible).
  • The material used & design specs. were kept as close as possible to the original part to preserve the stock "tone".
Amp Output Wattage Part No. Primary Fender Model Names   Similar To Fender Part No.
5 - 15 Watt 290AX 120 VAC 60 Hz. Bronco (AA764, Blackface) Champ (Tweed, 5C1, 5E1, 5F1, AA764, Blackface, Silverface) Vibro Champ AA764, Blackface, Silverface) Harvard (6G10) Princeton (Tweed, 5E2, 5F2, 5F2A, AA964, Brown, Blackface, Silverface) Princeton Reverb (AA1164, AA764, B1270, Blackface, Silverface) Domestic 125P1B, 022772, 66079
5 - 15 Watt 291AEX 120/240 VAC 50/60Hz. Bronco (AA764, Blackface) Champ (Tweed, 5C1, 5E1, 5F1, AA764, Blackface, Silverface) Vibro Champ AA764, Blackface, Silverface) Harvard (6G10) Princeton (Tweed, 5E2, 5F2, 5F2A, AA964, Brown, Blackface, Silverface) Princeton Reverb (AA1164, AA764, B1270, Blackface, Silverface) Export 125P1B, 022772, 66079
15 Watt 290XX 120 VAC 60 Hz. Blues Junior Domestic 49967
15 Watt 290XEX 240 VAC 50/60Hz. Blues Junior Export 49968
15 Watt 290AAX 120 VAC 60 Hz. Musicmaster Bass Domestic 26821
20 Watt 290BX 120 VAC 60 Hz. (Deluxe, 5A3, 5B3, 5C3,5E3, 6G3, AB763) (Deluxe Reverb, A1172, A1270, AA763, AB763, AB868, Blackface, Silverface, W/Volume Boost) Tweed Tremolux Domestic 125P23B, 125P23D, 025130
20 Watt 290BEX 240 VAC 50/60 Hz. (Deluxe, 5A3, 5B3, 5C3, 5E3, 6G3, AB763) (Deluxe Reverb, A1172, A1270, AA763, AB763, AB868, Blackface, Silverface, W/Volume Boost) Tweed Tremolux Export  
40 Watt 290CX 120 VAC 60 Hz. (Vibrolux, AB763) (Vibrolux Reverb, AA270, AA964, AB568) (Tremolux, AA763, AB763) Domestic 125P26A, 022723
40 Watt 290CEX 240 VAC 50/60 Hz. (Vibrolux, AB763) (Vibrolux Reverb, AA270, AA964, AB568) (Tremolux, AA763, AB763) Export  
40 Watt 290UX 120 VAC 60 Hz. Hot Rod Deluxe Domestic 36958
40 Watt 290UEX 240 VAC 50/60 Hz. Hot Rod Deluxe Export  
40 Watt 290EZ 120 VAC 60 Hz. 57 Twin Reissue Domestic 64419000
40 Watt 290EEZ 230/240V 50/60 Hz. 57 Twin Reissue Export 64603000
40 - 50 Watt 290DX 120 VAC 60 Hz. (Bandmaster Tweed, Bandmaster Reverb AA1069, AA270, AA763, Silverface, Blackface, Tweed) (Baseman Combos, Baseman Tweed, Baseman 5F6, 5F6A, Baseman 59) (Pro Tweed, Pro, Pro Blackface, AB763, Pro Reverb AA1069, AA270, AB668, Silverface) (Super Tweed, Super Brownface, 5F4, 6G4, 6G4A, Super Reverb AA270, AA763, AB568, AB763, Blackface, Silverface) (Vibroverb 6G16, AA763, Blackface) Domestic 125P5D, 022798
40 - 50 Watt 290DEX 240 VAC 50/60 Hz. (Bandmaster Tweed, Bandmaster Reverb AA1069, AA270, AA763, Silverface, Blackface, Tweed) (Baseman Combos, Baseman Tweed, Baseman 5F6, 5F6A, Baseman 59) (Pro Tweed, Pro, Pro Blackface, AB763, Pro Reverb AA1069, AA270, AB668, Silverface) (Super Tweed, Super Brownface, 5F4, 6G4, 6G4A, Super Reverb AA270, AA763, AB568, AB763, Blackface, Silverface) (Vibroverb 6G16, AA763, Blackface) Export  
40 - 50 Watt 290EX 120 VAC 60 Hz. (Bandmaster 6G7A, AA763, AB763, AC568, AD1269, Blackface, Blonde, Silverface) (Bassman AA165, AA270, AA864, AB165, Blackface, Silverface) (Concert 6G12A, AA763, Blackface, Brownface) Domestic 125P7D, 022814
40 - 50 Watt 290EEX 240 VAC 50/60 Hz. (Bandmaster 6G7A, AA763, AB763, AC568, AD1269, Blackface, Blonde, Silverface) (Bassman AA165, AA270, AA864, AB165, Blackface, Silverface) (Concert 6G12A, AA763, Blackface, Brownface) Export  
50 - 60 Watt 290VX 120 VAC 60 Hz. (Hot Rod DeVille) (Chorus Ultra) (Deluxe Blues) (Super-Sonic 60 Combo) (93 Super/Concert) Domestic 41752
50 - 60 Watt 290VEX 240 VAC 50/60 Hz. (Hot Rod DeVille) (Chorus Ultra) (Deluxe Blues) (Super-Sonic 60 Combo) (93 Super/Concert) Export  
60 Watts 290SX 120 VAC 60 Hz. Vibro King Domestic 26554
15 / 75 Watt 290YX 120 VAC 60 Hz. Fender 75 Domestic 13895
15 / 75 Watt 290YEX 240 VAC 50Hz. Fender 75 Export  
85 Watts 290EBZ 120 VAC 60 Hz. 65 Twin Reverb Reissue Domestic 37610
100 Watt 290RX 120 VAC 60 Hz. Tone Master Domestic 26477
100 Watt 290TX 120 VAC 60 Hz. 59 Bassman - Reissue Domestic 36483
100 Watt 290EAZ 120 VAC 60 Hz 94 Twin - Reissue Domestic 47776
100 Watt 290FX 120 VAC 60 Hz. (Vibrosonic Reverb 100) (Baseman 100) (Quad Reverb 100) (Showman AA768, AB763, AC568, Blackface, Dual AB763, AC568, Reverb 100 , Reverb AA270, AA769, Silverface) (Super Six Reverb 100) (Twin Reverb 100, AA270, AA769, AB763, AC568, Blackface, Silverface) Domestic 125P34A, 022756
100 Watt 290FEX 240 VAC 50/60 Hz. (Vibrosonic Reverb 100) (Baseman 100) (Quad Reverb 100) (Showman AA768, AB763, AC568, Blackface, Dual AB763, AC568, Reverb 100 , Reverb AA270, AA769, Silverface) (Super Six Reverb 100) (Twin Reverb 100, AA270, AA769, AB763, AC568, Blackface, Silverface) Export  
135 Watt 291ZZ 120 VAC 60Hz. Fender 135 (Twin Reverb, Quad Reverb, Super Six, Vibro) Domestic 13692
135 Watt 291ZEZ 120/240 VAC 50/60 Hz. Fender 135 (Twin Reverb, Quad Reverb, Super Six, Vibro) Export  
Reverb 290WX 120 VAC 60 Hz. Stand Alone Reverb - 1963 Domestic 68319
Reverb 290WEX 240 VAC 50Hz. Stand Alone Reverb - 1963 Export  
Power transformers marked UPGRADED (above) use high grade 29M6 magnetic steel laminations for reduced losses, more surge output power, cooler operation & longer life.

Marshall (Power Transformers)

Click part number for details (e.g., CAD files, assembly instructions)

 
Part No. Primary Marshall Model Names Equivalent To Marshall Part No.
290PAZ 120/240 VAC 50/60 Hz. 18 Watt Combo -
290GX 120/220/240 VAC 50/60 Hz. JCM 800, JMP - 50 watt -
290HX 120/220/240 VAC 50/60 Hz. JCM 800 & JMP - 100 watt -
290KX 120/240 VAC 50/60 Hz. JCM 900 - 50 watt -
290JX 120/240 VAC 50/60 Hz. JCM 900 - 100 watt -
290LX 120/240 VAC 50/60 Hz. JTM 45 -
290QX 120/240 VAC 50/60 Hz. JTM30 -

VOX (Power Transformers)

Click part number for details (e.g., CAD files, assembly instructions)

 
Part No. Primary VOX Model Names Equivalent To VOX Part No.
290PX 120/240 VAC 50/60 Hz. AC15 -
290CZ 120/240 VAC 50/60 Hz. AC15C1 -
290NX 100/120/220/230/240 VAC 50/60 Hz. AC30 Vintage -
290MX 120/240 VAC 50/60 Hz. AC30 Reissue -

Yorkville/ Traynor (Power Transformers)

Click part number for details (e.g., CAD files, assembly instructions)

 
Part No. Primary Yorkville / Traynor Model Names Equivalent to Yorkville / Traynor Part No.
99145 115VAC / 60Hz. Mono Block2 Bass Amp A1305
98965 120/240VAC 50/60 Hz. 100 Watt A1380

AMPEG (Power Transformers)

Click part number for details (e.g., CAD files, assembly instructions)

 
Part No. Primary AMPEG Model Names Equivalent To AMPEG Part No.
290CAZ 117 VAC 60 Hz. GEMINI VI 25W PT 113