All transformers are in stock. Choose from our biggest variety of transformers. We can modify them for you to fit your needs. Good news for the hundreds who call about the "Hammond Manufacturing" line of products. Yes, we carry the flagship transformers by Hammond Manufacturing TM Electronics Group.


In-house added value services:

  • 24 hour turn around PCB. 

  • Custom regulators boards. Just send us your schematics and let our team of engineers build it.

  • Custom CNC cuts available for enclosures bought from us.

  • Pad printing up to 3" * 2" in size, variety of colors.

  • Assembly capabilities.

Minimum order:


$300. New, free shipping! for any transformer order above $600 


How to  order transformers:


E-mail us at with EID's transformer part number (P#), and we'll promptly provide you with quote. Or contact our sales or customer service department 704-366-4357. Please state P# and quantities on the e-mail subject line.


To "Classic" Products

"Classic" - Transformers

  • Filament, Plate & B+ Filters

  • Tube Output (Single Ended & Push-Pull)

  • Chokes & Reactors

  • Line Isolation

  • Our "Classic"




Chokes & Reactors

  • D.C. Filter Chokes

  • D.C. Reactors

  • R.F. Chokes

To Power Transformer Index

Power Transformers

  • P.C. Board Mount

  • Chassis Mount

  • Toroidal

  • Low & High Voltage


To Audio Index

Audio Transformers

  • P.C. Board Mount

  • Chassis Mount

  • Broadcast Quality

  • "Classic" Tube driver & output

  • Matching

  • Sound distribution

To Line Xfmr Index

Line Transformers

  • Isolating

  • Autotransformers

  • Constant Voltage - AC Regulators

  • Hard Wired & Plug In


Class 2 - Energy Limiting

  • Chassis/Box Mount

  • Plug In

To CV Products

Constant Voltage - AC Regulators

  • Isolates

  • Constant Voltage - AC Regulator

  • Plug In


To Pulse Xfmr Index

Pulse Transformers

  • P.C. Board Mount

  • Chassis Mount

To Instrument Xfmr Index

Instrument Transformers

  • Current Transformers

  • Potential (Voltage) Transformers