Thread: Selecting power Fets for 500 KC transmitter
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Old December 28th 07, 09:15 PM posted to rec.radio.amateur.homebrew
ken scharf ken scharf is offline
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First recorded activity by RadioBanter: Jul 2006
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Default Selecting power Fets for 500 KC transmitter
Scott wrote:
I can hardly imagine just about any device like this having an Ft so low
that it wouldn't work at 500 KHz. What ham band do we have at 500 KHz?

wrote:
Greetings!!!


I plan on building a 500 KC transmitter, 200 watts output. I have
never worked with power FETS before.

What is the selection method used in determining which FET to use??
I see some great FETS
cheap.

Example: IRFP254

250 volt Vdss

RDS on .14

Amps 32 amps

Rise time : 51 NS

Cost; 2.50 each

The data sheet does not spec any freq's ( Ft) like bipolar
transistors?? How do I select the right FET??? freq range

Thanks!!!

The 500 KC transmitter will run at 28 VDC

Well a friend of mine once wanted to build a mobile transmitter for
455khz AM and 10.7mhz FM so he could tell the bozo in the car ahead of
him where to go after he cut him off.....
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