Technical Information

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Simple 400 Watt
RF Amp for
80 meters

VFO for 160 & 80 meters

Pulse Width Modulator and power supply

24 MOSFET RF Amplifier - Step by Step

Analog Modulator (Class H) and power supply

Class E Kits
and Parts


Radio Engineering Associates

Technical Support

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Where to get parts

I have a list of parts sources for class E transmitters. The parts for these transmitters are generally available from common, reliable sources such as Mouser, Digikey, Future Electronics and Newark Electronics. There are also numerous surplus outlets which have parts from time to time. Also check the List of sources of parts for more information.

Parts that I currently have:

MOSFETs
Driver ICs
Transistors
Damper Diodes
Power Transformers
PC boards / parts kits

Class E Boards and Part Kits:

These kits consist of PC boards, and optionally, all parts for the boards. Both PWM and class H modulator kits are available. Both the PWM and class H modulators interface to the Overload Shutdown / Efficiency Meter board, and, except in very special applications, the Overload / Efficiency Meter board must be used to protect the modulator and transmitter from damage in the event of an overload.


Note:Ordering and Payment information is located at the bottom of this page.

The following boards and parts for the boards are available:

  • PWM Boards and Parts
    • Boards Only
      • PWM Generator Board Only: $20.00
      • PWM Output Section Board: $20.00
      • Overload Shutdown / Efficiency Meter Board: $20.00
    • Boards and Board Parts
      • PWM Generator Board with all board parts. Includes a 6 pole, flat to 5.7kHz (3dB corner at about 7kHz) anti-aliasing filter as shown on main PWM generator schematic: $50.00
      • PWM Output Section Board with all board parts - minus the output MOSFETs and Damper Diodes: $50.00.
        Populate this board with output MOSFETS / Damper Diodes for the desired power level. Up to 250 watts per modulator MOSFET / Damper Diode pair.
      • Overload Shutdown / Efficiency Meter Board with all board parts: $60.00
    • Combined PWM Board Sets
      • Combined PWM Board Set (3 boards listed above) with all board Parts: $150.00

  • Class H Boards and Parts
    • Boards Only
      • Class H Board Only: $20.00
      • Overload Shutdown / Efficiency Meter Board: $20.00
    • Boards and Board Parts
      • Class H Board with all board parts: $60.00
      • Overload Shutdown / Efficiency Meter Board with all board parts: $60.00
    • Combined PWM Board Sets
      • Combined Class H Board Set (2 boards listed above) with all board Parts: $120.00

  • Other Boards:
    • Microphone Preamp / Equalizer / Compressor Board Only: $15.00 (I no longer have parts for this board)

Shipping / Packing for Boards and Kits of Parts

  • Individual Boards (boards without parts): $4.00 for 1 board, $2.00 for each additional board.
  • Individual Boards and Parts together: $6.00 for 1 kit, $3.00 for each additional kit.
  • Combined Board and Parts sets: $8.00 for each combined kit.

MOSFETs, Transistors and Drivers

  • FQA11N90 MOSFETs for RF Amplifiers: $4.00 each
  • IRFP250n MOSFETs for PWM and class H modulators: $2.50 each
  • BUF420AW Bipolar Transistors (for Class H Modulators): $6.00 each
  • DSEI30-06a Ultrafast Diodes (600 volts / 30 amperes): $3.00 each
  • IXDD414 14A driver IC - TO220-5 Package: $4.00 each

Shipping / Packing for MOSFETs, Transistors and Diodes

  • $4.00 up to 15 devices, $5.00 up to 20 devices, $6.00 up to 30 devices.


Power Transformer

88VAC @ 5.5 Amperes, Weight 12 lbs - $24.00 plus shipping/packing (varies, contact me).

Payment and Ordering Information

I can accept money orders, checks or Pay Pal. My Pay Pal account is: My mailing address is:

Steve Cloutier
79 Tyler Road
Townsend, MA 01469

Check the List of sources of parts for more information.