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December 28th 07, 08:15 PM
posted to rec.radio.amateur.homebrew
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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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