Choose a link from the Hoffman Amplifiers parts catalog
Amp trim/Handles Bike Lighting Parts Board Building Parts Capacitors Chassis/Boxes Guitar Strings/Books
Foot Pedals Fuses/Cords/AC Jacks/Plugs/Connectors Pots/Knobs Lamps/Diodes/Channel Switching Misc. Hardware
Resistors Reverb Items Screws/Nuts/Washers Switches Tools/Batteries Transformers
Tubes/Valves Tube Sockets Wire/Cable Yard Sale Shop by Photo Non Stocked Items
Search the Parts Catalog View Your Shopping Cart Public Parts List Private Parts List Login Logout
image
Fuse Holders-Cords-AC Items Foot Pedals Jacks-Plugs-Connectors Jacks-Plugs-Connectors
Pots-Knobs Transformers Fuse Holders-Cords-AC Items Lamps-Diodes-Channel Switching
Tube Sockets Fuse Holders-Cords-AC Items Capacitors Tools and Batteries
Lamps-Diodes-Channel Switching Misc Hardware-Grommets-Feet-Ring terminals Switches Pots-Knobs
Tubes-Valves Guitar Strings Transformers Misc Hardware-Grommets-Feet-Ring terminals
Tools and Batteries Tools and Batteries Lamps-Diodes-Channel Switching Foot Pedals
Transformers Bike Light Parts Tube Sockets Wire-Cable-Heat shrink
Switches Pots-Knobs Tubes-Valves Screws-Nuts-Washers
Chassis-Boxes Handles-Amp Trim Parts Pots-Knobs Tubes-Valves
Lamps-Diodes-Channel Switching Handles-Amp Trim Parts Screws-Nuts-Washers Tube Sockets
Wire-Cable-Heat shrink Circuit Board Building parts Pots-Knobs Tools and Batteries
Pots-Knobs Screws-Nuts-Washers Tube Sockets Jacks-Plugs-Connectors
Switches Jacks-Plugs-Connectors Switches Switches
Fuse Holders-Cords-AC Items Capacitors Resistors Switches
Tube Sockets Jacks-Plugs-Connectors Jacks-Plugs-Connectors Transformers
Handles-Amp Trim Parts Lamps-Diodes-Channel Switching Misc Hardware-Grommets-Feet-Ring terminals Bike Light Parts
Pots-Knobs Pots-Knobs Tube Sockets Books
Pots-Knobs Capacitors Tubes-Valves Handles-Amp Trim Parts
Lamps-Diodes-Channel Switching Jacks-Plugs-Connectors Wire-Cable-Heat shrink Capacitors
Resistors Screws-Nuts-Washers Jacks-Plugs-Connectors Lamps-Diodes-Channel Switching
Wire-Cable-Heat shrink Jacks-Plugs-Connectors Reverb tanks and Bags Jacks-Plugs-Connectors
Lamps-Diodes-Channel Switching Jacks-Plugs-Connectors Chassis-Boxes Fuse Holders-Cords-AC Items
Pots-Knobs Tools and Batteries Circuit Board Building parts Handles-Amp Trim Parts
Tubes-Valves Jacks-Plugs-Connectors Pots-Knobs Foot Pedals
Transformers Circuit Board Building parts Circuit Board Building parts Tube Sockets
Resistors Tube Sockets Transformers Fuse Holders-Cords-AC Items
Tube Sockets Screws-Nuts-Washers Resistors Wire-Cable-Heat shrink
Misc Hardware-Grommets-Feet-Ring terminals Capacitors Pots-Knobs Tubes-Valves
Circuit Board Building parts
You can scroll through the images above using the Image scroll controls or you can use the Left and Right arrow keys on your keyboard.
ratings image Click these to rate parts

Tube amp Transformers


Information

Go to this page for
Transformer hookup diagrams, spec's, technical info and weights for the transformers on this page
Go to this page for Marshall power switch hookup diagrams.
Note: My distributor only carries 120Vac primaries on most Fender power transformers.

Chokes


Small Fender choke

Small Fender style choke
Used in BF/SF Deluxe's, Deluxe reverbs and Vibrolux reverbs
Part number 125C3A.
Price each = $18.00

Customer Ratings

Qty -

Large Fender choke

Large Fender style choke
Used in all the larger fenders, Super reverbs, Twin reverbs, Bandmasters, tweed Bassman's, Bassman heads
Part number 125C1A
Price each = $19.00

Customer Ratings

Qty -

Output Transformers


Reverb transformer Fender

Reverb output transformer for Fender combos.
Used on all reverb heads and combos.
Part number 022921.
Price each = $18.00

Customer Ratings

Qty -

Output trans Champ

.022905
Price each = $30.00

Customer Ratings

Qty -

Output trans Princeton

Output for Princeton's
12 watts, 8 ohm secondary.
Two 6V6 power tubes
Part number 022913
Price each = $44.00

Customer Ratings

Qty -

Output trans Deluxe

Output for Tweed Deluxe and Deluxe Reverb
25 watts, 8 ohm secondary.
Two 6V6 power tubes.
Part number 041318.
Price each = $50.00

Customer Ratings

Qty -

Output trans Pro-Vibrolux reverb

Output for Pro Reverb, Vibrolux Reverb, Tremolux
35 watts, 4 ohm.
Two 6L6 power tubes
Part number 022848
Price each = $45.00

Customer Ratings

Qty -

Output trans Super reverb

Output for Super Reverb, Tweed Bassman
50 watts, 2 Ohm.
Two 6L6 power tubes
Part number 022855
Price each = $85.00

Customer Ratings

Qty -

40 watt 2 6l6 2-4-8 ohm output

Output for Super Reverb, Tweed Bassman, Bassman heads
50 watts with 2, 4 and 8 ohm secondary taps. Great upgrade for Pro Reverb, Bandmasters, etc.
This is the transformer that is being used to make Vibroverb's out of Bandmaster reverb heads.
Note: This transformer is physically larger than a pro reverb or bandmaster output.
If you are upgrading, you will probably have to drill some new mounting holes.
Two 6L6 power tubes
Part number 018343
Price each = $80.00

Customer Ratings

Qty -

Output trans Twin reverb

Output for Twin Reverb, Dual Showman
100 watts, 4 ohm.
Four 6L6 power tubes
Part number 022899
Price each = $80.00

Customer Ratings

Qty -

18 watt Output transformer

Heyboer 18 Watt output tranny
Used to build Marshall 18 Watt Heads and Combo clones.
Open frame construction, no Endbell covers.
It has 4, 8 and 16 ohm Taps.
Price each = $60.00

Customer Ratings

Qty -

Marshall 50 watt Output trans

Output transformer for older style 50 watt Marshall's.
Does not fit the JCM900's but could be adapted as an upgrade.
Two El34, 6L6 or 6550 power tubes.
Price each = $90.00

Customer Ratings

Qty -

Marshall 100 watt Output trans

Output transformer for older style 100 watt Marshall's.
Does not fit the JCM900's but could be adapted as an upgrade.
Four El34, 6L6 or 6550 power tubes.
Price each = $90.00

Customer Ratings

Qty -

Power Transformers

Note: My distributor only carries 120Vac primaries on most of the Fender power transformers.

Filament transformer

5 Volt 3 amp filament transformer
Use this transformer to add a tube rectifier to a power transformer that has a center tapped high voltage secondary.
3 amp rating means you can use it for 5Y3, 5U4G or 5AR4/GZ34 rectifier tubes. 115Vac 50/60Hz primary.
NOTE: Do not use the Red wire with the yellow stripe.
This is a center tap for the 5 volt AC winding. You do not need a center tap.
Tape off the end so it does not touch anything and short out.
Price each = $22.00

Customer Ratings

Qty -

Toroidal Power transformer

Used to power tube pedals.
12 volts AC input produces a B+ of about 240 VDC when under load.
Use the AC Wall wart below to power this transformer.
Size is 40mm x 40mm x 19mm high.
Note: Use 12 volts AC, not DC to power this tranny.
This tranny has PC style mounting pins but you can also solder wires to the pins for non PC hookups.
See my chassis page for the tube pedal chassis.
Click here to see data details
See the tube pedal project on this page for usage tips and hookup diagrams
Price each = $24.00

Customer Ratings

Qty -

USA wall wart

12 volt AC wall warts
Used to power the toroidal power transformer above.
I have 3 versions of this power supply, USA-120VAC, Euro-230VAC and UK240VAC.
The wall plug pattern is different on all 3, see photo.
The plug on the end of the cord is strange.
I stock the female power jack for these wall warts on my Jacks and Plugs page.
Price each = $14.00

Customer Ratings

Qty -

Euro wall wart

12 volt AC wall warts
Used to power the toroidal power transformer above.
I have 3 versions of this power supply, USA-120VAC, Euro-230VAC and UK240VAC.
The wall plug pattern is different on all 3, see photo.
The plug on the end of the cord is strange.
I stock the female power jack for these wall warts on my Jacks and Plugs page.
Price each = $14.00

Customer Ratings

Qty -

UK wall wart

12 volt AC wall warts
Used to power the toroidal power transformer above.
I have 3 versions of this power supply, USA-120VAC, Euro-230VAC and UK240VAC.
The wall plug pattern is different on all 3, see photo.
The plug on the end of the cord is strange.
I stock the female power jack for these wall warts on my Jacks and Plugs page.
Price each = $16.00

Customer Ratings

Qty -

Reverb unit Power transformer

6G15 Reverb, Re-Vibe and Pre-amp power transformer
Used to build model 6G15 stand alone reverbs, Re-Vibe's and pre-amps.
Uses a bridge rectifier.
Go here to see how to hook up the rectifier.
This model is for stand up type surface mounting
It has 100, 120, 220 and 240 Volt export primaries.
Part number is MOJO 779
Price each = $57.00

Customer Ratings

Qty -

Power trans Champ Princeton

Power transformer for BF/SF Fender Champs, Princeton's, Bronco's and Harvard's.
One or two 6V6 power tubes
Part number 125P1B.
Price each = $75.00

Customer Ratings

Qty -

Power trans Deluxe

Power transformer for BF/SF Fender Deluxe and Deluxe Reverbs.
Two 6V6 power tubes
Part number 041316.
Price each = $75.00

Customer Ratings

Qty -

Power trans Bassman super rev

Power transformer for BF/SF Fender Super Reverb, Pro Reverb, Vibroverb, Bandmasters, Bassman heads
Fits most all of the 2 power tube Fender amplifiers in the 40 watt range.
Two 6L6 power tubes
Part number 022798
Price each = $90.00

Customer Ratings

Qty -

Power trans Twin reverb

Power transformer for BF/SF Fender Twin Reverb, Showman, Dual Showman.
Fits most all of the 4 power tube fender amplifiers.
Four 6L6 power tubes
Part number 022756
Price each = $110.00

Customer Ratings

Qty -

18 watt Power transformer

Heyboer 18 Watt power tranny
Used to build Marshall 18 Watt Heads and Combo clones.
Laydown style with one Endbell.
It has a 120v and 240v primary wires.
290-0-290 Secondary
6.3 volt CT heater winding.
It has a 5 volt and 6 volt tube rectifier taps.
You can run either a standard 8 pin/5Y3/5V4,etc type or an EZ81/6CA4 rectifier tube.
Price each = $80.00

Customer Ratings

Qty -

Marshall 50 watt Power trans

Power transformer for 50 watt Marshall's
Has 120, 220 and 240 Volt primary
These power transformers produce around 460 to 480 volts DC when operating under load.
Two El34, 6L6 or 6550 power tubes.
Price each = $110.00

Customer Ratings

Qty -

Marshall 100 watt Power trans

Power transformer for 100 watt Marshall's
Has 120, 220 and 240 Volt primary.
These power transformers produce around 460 to 480 volts DC when operating under load.
These are not the super high voltage transformers that you see in 1973 era 100 watt Marshall's.
Four El34, 6L6 or 6550 power tubes.
Price each = $120.00

Customer Ratings

Qty -

Note: All transformers are tested thoroughly at the factory. I have never had a bad transformer since I began in business in 1993. Please do not install a transformer unless you know what you are doing. I have had customers install transformers in amps that had power supply shorts and other problems. It is rare, but It is possible for you to destroy a perfectly good transformer.
 I do not accept returns on transformers because I cannot be 100% certain that the installer followed the correct procedures. Anyone working on an amp should be properly diagnosing the problems instead of just throwing parts at the problem and hoping it fixes the problem. If you do not agree with my No returns on transformers policy, then please do not buy a transformer. If you are qualified to install a transformer in an amp and know what you are doing, then by all means git-R-dun. If you need technical help, please go to my amp forum. The guys there are awesome and love to help.

 Common scenarios I see all the time: No sound output from the amp, it must be an output transformer, right? WRONG! Power transformer blows fuses and so it must be the power tranny, right? WRONG again Vern! Power transformer still blows fuses after you install a new one and so it must be a bad transformer, right? You are right this time...No, I'm joking... WRONG!!!! Sorry about all of the above, I just want to make sure you understand my policy on transformers before you buy one.  Make sure you know exactly what you are doing before you buy and install a transformer.


Home - Ordering Information - PayPal info - Returning parts - Search the Hoffman Amps parts catalog
Q and A - Links - Shipping Info/policy - E-mail Me - Amplifier Service Technicians - About Hoffman Amps
Create your own custom Turret lug board

Hoffman Amplifiers Face Book Page

The Tube amp Library of information
Click the link above for Tube amp info, Schematics, Board building information, Projects, Mods, Transformer diagrams, Photo's, Sound clips.
There are hundreds of pages of Tube amp information on my library page.
Check out our huge library of Tube Amp schematics here
Please visit my Tube Amplifier Forum
Here's the place you can go to ask tube amplifier questions.
You will find a large community of friendly amp builders at the link above.