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Contact Us By Phone: 01535 636856
Please Note our NEW e-mail addresses: sales@kgaenclosures.co.uk or gary@kgaenclosures.co.uk

290 Series | Tube Guitar Amplifier - Power Transformers
Replacements and Upgrades.
Purchase Product Product Data Sheet Customisation Options

Product Features
  • Designed for drop in replacement of original units.
  • Physically, parts were designed to look similar to original factory units (where possible).
  • Material used and design specifications were kept as close as possible to the original part to preserve the stock "tone".
Hammond Manufacturing Transformers:
KGA Enclosures Ltd is a fully authorised distributor of the 290 Series from Hammond Manufacturing Transformers. We also stock the entire Hammond Manufacturing Transformers range at great competitive pricing and with full customisation options on all applicable products.

Please remember to always use approved distributors like KGA Enclosures Ltd as some companies sell knock-offs and copies, so using approved suppliers assures you receive a genuine product.

To purchase a product, request a quote/lead time and for all other general enquires, please use our contact form to contact us. We aim to respond promptly to all enquires. Payment options include Bank Transfer, PayPal and Credit/Debit cards. Unfortunately, we do not accept cash and cheques.
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290 Series | Hammond Manufacturing Transformers | KGA Enclosures Ltd
Product Options
For all ordering, price confirmation and lead times, please email us or call us on (+44) 01535 636856
Part No Amp / Model Names Primary Volts Secondary No. 1 Secondary No. 2 Secondary No. 3 1+ 5+
AMPEG (Power Transformers)
290CAZ Gemini VI 25W 117 VAC 60 Hz. - - - £75.22 £72.21
290ETX Super Echo Twin 120 VAC 60 Hz. - - - £104.08 £99.92
Fender (Power Transformers)
290AAX Musicmaster Base 120 V, 60 Hz 490 V at 90 mA. - 6.3 V at 1.25 A £66.68 £64.01
290ABX Vibro Champ XD 120/240 V, 50/60 Hz 293.5 V at 100 mA. 34 V CT at 95 mA. 9 V at 1.25 A £89.22 £85.65
290ACX Super Champ X2 120 V at 60 Hz 300 V at 100 mA. 34 V CT at 100 mA. 9 V at 1.5 A £80.08 £76.88
290AX Bronco, Champ, Princeton, Princeton Reverb, Vibro Champ 120 V, 60 Hz 650/550 V CT at 100 mA. - 6.3 V CT at 2.25 A £80.44 £77.22
290AXER 65 Princeton Reverb Reissue 240 V, 50/60 Hz 680 V CT at 100 mA. - 6.3 V CT at 2.25 A £103.99 £99.83
290AXR 65 Princeton Reverb Reissue 120 V, 60 Hz 680 V CT at 100 mA. - 6.3 V CT at 2.25 A £97.78 £93.86
290BAX Chorus, Power Chorus, Ultimate Chorus, Ultra Chorus 120 V at 60 Hz 60 V CT at 2.85 A - - £70.42 £67.60
290BBEX Deluex 120/220/230/240 at 50/60 Hz 710 V CT at 115 mA. - 6.3 V CT at 1.65 A £131.05 £125.81
290BBX Deluex 120 V at 50/60 Hz 710 V CT at 115 mA. - 6.3 V CT at 1.65 A £77.87 £74.75
290BEX Deluxe, Deluxe Reverb, Tremolux Tweed 240 V at 50/60 Hz 660 V CT at 138 mA. 50 V Bias 6.3 V at 3 A £92.71 £89.00
290BX Deluxe, Deluxe Reverb, Tremolux Tweed 120 V at 60 Hz 660 V CT at 138 mA. 50 V Bias 6.3 V at 3 A £77.26 £74.17
290BXX - 120 V at 60 Hz 660 V CT at 138 mA. 50 V Bias 6.3 V at 3 A £85.82 £82.39
290CAX Generic 120/240 V at 50/60 Hz 630/550 V CT at 115 mA. - 6.3 V at 2 A £67.60 £64.89
290CBZ Generic 120 V at 60 Hz 650 V CT at 120 mA. - 6.3 V at 2 A £102.63 £98.52
290CEX Deluxe 65 Reverb (Reissue), Deluxe 68 Custom Reverb, Fender 30, Model 30, Tremolux, Vibrolux, Vibrolux Reverb 240 V at 50/60 Hz 650 V CT at 207 mA. 50 V Bias 6.3 V at 4.5 A £102.40 £98.30
290CX Deluxe 68 Custom Reverb, Deluxe 65 Reverb (Reissue), Fender 30, Model 30, Tremolux, Virbolux, Vibrloux Reveb 120 V at 60 Hz 650 V CT at 207 mA. 50 V Bias 6.3 V at 4.5 A £92.32 £88.63
290D2EX Bandmaster, Bassman, Pro, Pro Reverb, Super, Super Reverb 120/210/220/230/240 V at 50/60 Hz 710 V CT/610 V CT at 300 mA. 50 V Bias 6.3 V CT at 5 A £161.07 £154.63
290D2X Bandmaster, Bassman, Pro, Pro Reverb, Super, Super Reverb 120 V at 60 Hz 710 V CT/610 V CT at 300 mA. 50 V Bias 6.3 V CT at 5 A £158.83 £152.47
290DAX Generic 120/240 V at 50/60 Hz 710/610 V CT at 230 mA. - 6.3 V CT at 5 A £134.43 £129.06
290DEX 59 Bassman, Bassman, Super (Lower Plate Voltage) 240 V at 50/60 Hz 650 V CT at 230 mA. 50 V Bias 6.3 V CT at 4 A £123.33 £118.40
290DHX Bandmaster 120 V at 60 Hz 315 V at 250 mA. - 26 V at 100 mA. £116.87 £112.20
290DX 59 Bassman, Bassman, Super (Lower Plate Voltage) 120 V at 60 Hz 650 V CT at 230 mA. 50 V Bias 6.3 V CT at 4 A £103.28 £99.15
290EAZ 94 Twin Reissue 120 V at 60 Hz 365 V CT at 850 mA. - 27.5 V at 100 mA. £134.07 £128.71
290EBZ 65 Twin Reverb Reissue 120 V at 60 Hz 340 V at 500 mA. 50 V at 100 mA. 6.3 V at 6 A £112.37 £107.88
290EEAZ 94 Twin Reissue 120/210/220/230/240 V at 50/60 Hz 365 V CT at 850 mA. - 27.5 V at 100 mA. £201.23 £193.19
290EEBZ 65 Twin Reverb Reissue 120/210/220/230/240 V at 50/60 Hz 340 V at 500 mA. 50 V at 100 mA. 6.3 V at 6 A £112.37 £107.88
290EEX Bandmaster, Bassman, Concert 120/210/230/240 V at 50/60 Hz 660 V CT at 275 mA. 53 V Bias 6.3 V CT at 4 A £127.45 £122.35
290EEZ 57 Twin Reissue 240 V at 50/60 Hz 660 V CT at250 mA. 50 V Bias 6.3 V at 4 A £143.09 £137.37
290EX Bandmaster, Bassman, Concert 120 V at 60 Hz 660 V CT at 275 mA. 53 V Bias 6.4 V CT at 4 A £110.32 £105.91
290EZ 57 Twin Reissue 120 V at 60 Hz 640 V CT at250 mA. 50 V Bias 6.3 V at 4 A £118.70 £113.95
290FEX Bassman, Quad with Reverb, Showman, Showman Dual, Showman Dual Reverb, Showman Reverb, Super Six Reverb 100, Twin Reverb, Vibrosonic 240 V at 50/60 Hz 640 V CT at 518 mA. 60 V Bias 6.5 V at 5.5 A £133.18 £127.86
290FEXA Generic 120/220/230/240 at50/60 Hz 690/640 V CT at 450 mA. 60 V Bias 6.3 V CT at 5.5 A P.O.A. P.O.A.
290FX Bassman, Quad with Reverb, Showman, Showman Dual, Showman Dual Reverb, Showman Reverb, Super Six Reverb 100, Twin Reverb, Vibrosonic 120 V at 60 Hz 640 V CT at 518 mA. 60 V Bias 6.5 V at 5.5 A £120.00 £115.20
290HAEX Harvard 120 V/210/230 V/240 V at 50/60 Hz 550 V CT at 100 mA. 50 V Bias 6.3 V CT at 2.5 A £105.64 £101.42
290HAX Harvard 120 V at 60 Hz 550 V CT at 100 mA. 50 V Bias 6.3 V CT at 2.5 A £100.38 £96.37
290HBZ Generic 120 V at 60 Hz 620 V at 150 mA. 50 V Bias 6.3 V CT at 2.25 A £145.71 £139.88
290LEX Generic 100/120/220/230/240 V at 50/60 Hz 690 V CT at 200 mA. - 6.3 V CT at 5 A £120.13 £115.32
290REX Twin Red Knob 100/120/220/240 V at 50/60 Hz 337 V CT at 1.1 A - 54 V at 250 mA. £176.81 £169.73
290RX Twin Red Knob 120 V at 60 Hz 337 V CT at 1.1 A - 54 V at 250 mA. £151.30 £145.24
290S2Z Sunn 2000 117 V at 60 Hz 780 V CT at 400 mA. 55 V Bias 6.3 V CT at 8 A £212.78 £204.26
290SX Tonemaster, Vibro King 120/230/240 V at 50/60 Hz 337 V CT at 1.1 A - 54 V at 250 mA. £171.71 £164.84
290TX Bassman 120 V at 60 Hz 696 V CT at 500 n A 52 V Bias 6.5 V at 2 A £121.67 £116.81
290TZ Generic 120/240 V at 50/60 Hz 380 V CT at 750 mA. 60 V Bias 6.3 V at 500 mA. P.O.A. P.O.A.
290UEX 63 Vibroverb Reissue, Blues Deluxe, Blues Deluxe (Reissue), Hot Rod Deluxe 240 V at 50/60 Hz 308.5 V at 250 mA. - 39 V at 250 mA. £91.45 £87.79
290UX 63 Vibroverb Reissue, Blues Deluxe, Blues Deluxe (Reissue), Hot Rod Deluxe 117 V at 60 Hz 308.5 V at 250 mA. - 39 V at 250 mA. £87.88 £84.37
290VEX 93 Super Concert, Hot Rod Deville, Super Sonic 60 Combo 240 V at 50/60 Hz 342 V at 500 mA. - 52 V CT at 250 mA. £143.37 £137.64
290VX 93 Super Concert, Hot Rod Deville, Super Sonic 60 Combo 117 V at 60 Hz 342 V at 500 mA. - 52 V CT at 250 mA. £118.98 £114.22
290WEX 63 Reverb 240 V at 50/60 Hz 237 V at 50 mA. - 6.6 V at 1.05 A £44.95 £43.15
290WX 63 Reverb 120 V at 60 Hz 237 V at 50 mA. - 6.6 V at 1.05 A £42.90 £41.18
290XEX Blues Jr. 240 V at 50/60 Hz 260 V at 170 mA. - 20 V at 100 mA. £77.40 £74.30
290XX Blues Jr. 117 V at 60 Hz 260 V at 170 mA. - 20 V at 100 mA. £77.57 £74.46
290XXA Pro Jr. 117 V at 60 Hz 260 V at 170 mA. - 6.3 V at 3 A £76.51 £73.45
290XXB Pro Jr. 117 V at 60 Hz 260 V at 170 mA. - 6.3 V CT at 3 A £124.37 £119.39
290YEX Bassman 240 V at 50/60 Hz 372 V CT at 400 mA. 56 V Bias 6.3 V CT at 4 A £123.83 £118.88
290YX Bassman 120 V at 60 Hz 372 V CT at 400 mA. 56 V Bias 6.3 V CT at 4 A £104.26 £100.09
291ACX Super Champ X2 120/240 V at 50/60 Hz 300 V at 100 mA. 34 V CT at 100 mA. 9 V at 1.5 A £84.09 £80.73
291AEX Bronco, Champ, Princeton, Princeton Reverb, Vibro Champ 120/220/230/240 V 50/60 Hz 650/550 V CT at 100 mA. - 6.3 V CT at 2.25 A £93.27 £89.54
291AX Generic 120 V at 60 Hz 650 V CT at 81 mA. - 6.3 V CT at 2 A £79.91 £76.71
291CEX Generic 240 V at 50/60 Hz 650 V CT at 207 mA. 50 V Bias 6.3 V CT at 4 A £118.44 £113.70
291CX Generic 120 V at 60 Hz 650 V CT at 207 mA. 50 V Bias 6.3 V CT at 4 A £98.98 £95.02
291DEX Generic 240 V at 50/60 Hz 650 V CT at 230 mA. 50 V Bias 6.3 V CT at 4 A P.O.A. P.O.A.
291DX Generic 120 V at 60 Hz 650 V CT at 230 mA. 50 V Bias 6.3 V CT at 4 A P.O.A. P.O.A.
291EEX Generic 240 V at 50/60 Hz 660 V CT at 276 mA. 53 V Bias 6.5 V at 3.15 A £125.52 £120.50
291FX Generic 120 V at 60 Hz 640 V CT at 518 mA. 60 V Bias 6.5 V at 5.5 A £141.88 £136.21
291MZ Vibrolux Tweed 100/120/220/230/240 Vat 50/60 Hz 700/650 V CT at 75 mA. 50 V Bias 6.3 V at 3 A £65.91 £63.27
291ZEZ Bassman 120/240 V at 50/60 Hz 364 V CT at 1 A 53 V Bias 6.3 V CT at 7 A £207.21 £198.92
291ZZ Super Six Reverb 135, Bassman 120 V at 60 Hz 364 V CT at 1 A 53 V at 1 A 6.3 V CT at 7 A £172.61 £165.71
Marshall (Power Transformers)
290CG TSL100 120/240 VAC 50/60 Hz. 338 V at 450 mA. 6.3 V CT at 7 A 43 V CT at 150 mA. £116.29 £111.64
290GX JCM 800, JMP50, Watt 120/220/240 VAC 50/60 Hz. 690 V CT at 200 mA. 6.3 V CT at 5 A - £115.84 £111.20
290GZ Same as 290GX except Z mount 120/220/240 VAC 50/60 Hz. 690 V CT at 200 mA. 6.3 V CT at 5 A - £132.62 £127.31
290HX JCM 800 and JMP-100 Watt 120/220/240 VAC 50/60 Hz. 350 V CT at 420 mA. 6.3 V CT at 7 A 50 mA. Bias £122.30 £117.41
290HZ Same as 290HX except Z mount 120/220/240 VAC 50/60 Hz. 350 V CT at 420 mA. 6.3 V CT at 7 A 50 mA. Bias £131.87 £126.60
290JDX DSL-401 117/234 VAC 50/60 Hz. 307 V at 215 mA. 6.7 V at 3.5 A 25 V at 75 mA. £88.41 £84.87
290JX JCM 900, JCM2000100 Watt 120/240 VAC 50/60 Hz. 360 V at 450 mA. 6.3 V CT at 7 A 43 V CT at 250 mA. £162.16 £155.68
290KX JCM 90050 Watt 120/240 VAC 50/60 Hz. 332 V at 300 mA. 6.6 V CT at 4 A 41 V CT at 100 mA. £144.93 £139.13
290LX Bluesbreaker Reissue 120/240 VAC 50/60 Hz. 600 V CT at 230 mA. 6.3 V CT at 4 A 5 V at 2 A £160.91 £154.48
290MAEX JTM 45-50 100/120/220/230/240 VAC 50/60 Hz. 690/625 V CT at 150 mA. 6.3 V CT at 5 A 5 V at 3 A £144.93 £139.13
290MAZ Studio 15 "Little Fatty" 117/234 VAC 50/60 Hz. 600 V CT at 100 mA. 6.3 V CT at 2 A - £115.34 £110.73
290PAZ 18 Watt Combo 120/240 VAC 50/60 Hz. 580 V CT at 140 mA. 6.3 V CT at 3 A 6.3/5 V at 2 A £96.40 £92.55
290QX JTM30 120/240 VAC 50/60 Hz. 325 V at 270 mA. 6.3 V at 3.1 A 25 V at 233 mA. £102.00 £97.92
VOX (Power Transformers)
290CEZ AC15C1 120 / 240 VAC 50 / 60 Hz. - - - £80.92 £77.68
290CZ AC15C1 120 VAC 60 Hz. - - - £78.76 £75.61
290MAX TB35C2 Tony Bruno 120 / 240 VAC 50 / 60 HZ. - - - £115.00 £110.40
290MX AC30 60's Vintage Flat 120 / 240 VAC 50 / 60 Hz. - - - £110.80 £106.37
290NX AC30 60's Vintage Vertical 100 / 120 / 220 / 230 / 240 VAC 50 / 60 Hz. - - - £166.11 £159.47
290PX AC15 120 / 240 VAC 50 / 60 Hz. - - - £97.78 £93.86
Yorkville / Traynor (Power Transformers)
290TRA 100 Watt Bass 120 VAC 60 Hz. 320 V at 600 mA. 60 V at 50 mA. 6.3 V ct at 9 A £176.81 £169.73
290TRB YBA2-B 120 VAC 60 Hz. 620 VCT at 115 mA. 6.3 V ct at 3 A - £76.43 £73.37
291JEX BaseMaster YBA-1 120/240 V 50/60 Hz 320 V at 500 mA. 60 V at 20 mA. 6.65 V ct at 2.5 A £153.15 £147.02
291JX BaseMaster YBA-1 120 V 60 Hz 320 V at 500 mA. 60 V at 20 mA. 6.65 V ct at 2.5 A £153.15 £147.02
291TC Mono Block 2 Bass Amp 115 VAC / 60Hz. 76.5 VCT at 4.3 A - - £157.97 £151.65
291YX YBA-3 120 V 60 Hz 800 VCT at 530 mA. 6.3 V ct at 6 A - £203.28 £195.15
79465 YBA2-B 120 VAC 60 Hz. 620 VCT at 115 mA. 6.3 V ct at 3 A - P.O.A. P.O.A.
79632 Mono Block 2 Bass Amp 115 VAC / 60Hz. 76.5 VCT at 4.3 A - - P.O.A. P.O.A.
79691 YBA-3 120 V 60 Hz 800 VCT at 530 mA. 6.3 V ct at 6 A - P.O.A. P.O.A.
81384 BaseMaster YBA-1 120 V 60 Hz 320 V at 500 mA. 60 V at 20 mA. 6.65 V ct at 2.5 A P.O.A. P.O.A.
98965 100 Watt Bass 120 VAC 60 Hz. 320 V at 600 mA. 60 V at 50 mA. 6.3 V ct at 9 A P.O.A. P.O.A.
For product compatibility and more information, please click part number or view our product data sheet.

290 Series | Power - Classic High Voltage Tube Plate | Hammond Manufacturing Transformers | KGA Enclosures Ltd

Hammond Manufacturing Customisation Services
Product Customisation Options:
What makes KGA Enclosures Ltd different from most other larger distributors is that we can offer full customisation services on all enclosures and accessories. All customisation work is undertaken by the relevant supplier, (some smaller production runs are done by utilizing an outside contractor) at their own manufacturing facilities. These services include milling or punching holes and slots into the enclosure or end plates for cables, connectors, switches, etc. Printing and silk-screening services all for the addition of text, logos, and graphics onto both the enclosure and end plates, to allow the end user to easily identify the product, and to allow the final product to look more elegant. Contact us today to see how we can assist you.
Modified Electronic Enclosures:
Almost every enclosure will need some kind of modification to be useful. In house, modifications can be tedious, over-complicated, and a distraction from your core business. A third party shop can add time and expense. Let us help you by delivering quality products made to your exact specifications.
Why Use Hammond Manufacturing?
  • Hammond offers a wide selection and massive inventory ready to be modified.
  • Typically, the minimum order is 25 units. This can vary depending on the product and services required.
  • Hammond has an experience enclosure modification team and two dedicated modification facilities located in North America and Europe. We are knowledgeable, available, and capable.
  • Hammond helps eliminate scrap and design errors with approval drawings to confirm correct interpretation of your design requirements. Many orders will also include fast delivery of sample enclosures for inspection. These steps ensure that your assembly fits perfectly before heading to the production stage.
Popular Modification Services Offered:
  • Holes.
  • Cutouts.
  • Tapping and Countersinking.
  • Pressed-in hardware (studs, standoffs).
  • Silk Screening.
  • UV Printing.
  • Special colours.
  • Special length extrusions.
  • Pre-Installed Accessories.
  • Available services vary by product.
Customisation Serices | Hammond Manufacturing | KGA Enclosures Ltd

290 Series | Hammond Manufacturing Transformers | Enclosures - Racks - Transformers - Components


Contact KGA Enclosures
Call Us: (+44) 01535 636856
E-Mail - Sales: sales@kgaenclosures.co.uk
E-Mail - Gary (MD): gary@kgaenclosures.co.uk
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KGA Enclosures Ltd (2026)
Business No. 09341700