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SD2942 350W FM Pallet Amplifier

SD2942 350W FM Pallet Amplifier
(2 reviews)  

1.00 lbs
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Designed for FM radio transmitters, this amplifier incorporates microstrip technology and an SD2942 MOSFET transistor to enhance ruggedness and reliability.

  • 86-110MHz
  • 48 Volts
  • SD2942 MOSFET
  • Input/Output 50 ohms
  • Pout 350W min. w/4 watt input.
  • 20% higher power saturation than SD2932, MRF151G and BLF278
  • 18 dB gain minimum.
  • Low distortion Class B push-pull.
  • Temperature compensated bias
  • Compact size; LxWxH 4.0 x 2.0 x 1.5 inches
  • Standard 1/4 inch copper heat spreader.
  • The SD2942 mosfet is new technology that was recently introduced by ST. This is the first VHF 48V push-pull mosfet with a 350W factory power rating.
  • Our PA's use teflon low impedance high temperature coax to form high power matching transformers.
  • We use automatic coax and wire processing tools to guarantee consistent performance from unit to unit. All of the surface mount components are reflowed. There is no hand soldering of chip components.
  • Please download the amplifier data sheet in PDF format (312kb). The data sheet contains detailed performance information and more pictures.
  • Quick facts about current draw: For 350 watts current draw is 10.1 - 10.5 amps @ 48V.
  • Each pallet amplifier we sell is tested on HP 8753 vector network analyzers. Phase, gain, return loss and saturated power parameters are measured on each PA module before it is allowed to leave our factory.
  • We sell a high quality 500 watt low pass filter for FM broadcast applications.


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Average customer rating:
(2 reviews)  

2 Most useful customer reviews (see all reviews):
Richard Rhodes
Oct 11, 2019
Worked as advertised. Replaced final in a Broadcast Technologies BT-300. Tapping the heat sink on the BT-300 was the the only real work.

Advantages: Revived an otherwise obsolete RF amp.
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Robert Williams
Feb 22, 2017
I used this pallet amp to replace the driver stage in a Harris HT-5 FM transmitter. It has been in service for over 4 years with no problems.

Advantages: Small enough to mount on existing heat sink after the original circuit board was removed. Worked fine on the 24 to 28 volt driver supply that was in the transmitter.
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