40 Watt Amplifier For FM Broadcast by MRF171A

This amplifier was built based on Marconi’s website, A Design for a 40W broadband VHF RF Power Amplifier for FM broadcast. A few minor tweaks were made to the schematic and a few parts were changed to what I had available (mostly surface mount components).

Click to View Circuit

The heatsink is from an old Motorola Mostar 800 MHz radio, and has the perfect heatsink island to match the MRF171A. Also used is a Progressive Concepts external LPF7002 low pass filter because it was also on hand. Since the MOSFET uses 28 VDC, I had to homebrew a 28 Volt / 5 Amp power supply using the schematic found in the ARRL handbook.

Read More Source:
http://www.geocities.com/Area51/Nebula/3736/40watt.html
Thank you.

This entry was posted on Friday, October 19th, 2007 at 11:27 am and is filed under Power Amplifier, RF-Radio Frequency. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.