Welcome and feel free to ask questions about class E, mosfet's, and AM.
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Postby Axholt » Wed Jan 18, 2006 2:38 am

Last edited by Axholt on Sat Jan 26, 2008 10:35 am, edited 1 time in total.
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Postby frank carcia » Wed Jan 18, 2006 2:57 pm

Hi welcome,
There is no modulation in a class E amplifier. AM is applied with a series modulator. FM will work very well in a class e amplifer but wide band modulation may cause slight carrier level shifts. frank WA1GFZ
frank carcia
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Question for Dummies

Postby WA2WVL » Wed Jan 18, 2006 4:29 pm


Class E is atractive to "Ham" operators for several reasons.

1. It allows 10-100 watts to be developed from a single power supply Fet not intended for RF service but very cheap ($1-5 us).
2. It allows efficiencys > 90% minimumizing size,weight,cost,heat, etc.
3. It allows these cheap Fets to be used at frequencies much higher than they were designed for. ( and higher than Class D )
4. It is interesting to work with something new. (new to some of us)

I would not recommend using Class E for 100 mw unless it were battery powered where battery life was critical.

As Frank has said Narrow Band FM will work fine but one very importain factor in picking a device is carrier frequency.

Floyd WA2WVL
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