AM RF amp
Moderators: Sir Nigel, Nina, pcs, 5r, phpBB2 - Administrators
AM requires linear amplifier operation.
Linear amplifiers are highly inefficient.
It is much better to modulate the final stage of a AM transmitter
and keep final stage in a highly efficient (but non-linear) C
or D/E stage.
This is why what you want to do will generate a lot of heat.
By the way, if you want a 10W carrier, you need 40W peak amp.
The best would be to run your exciter in full power mode (CW)
and take the modulating voltage and use it to modulate a new
stronger extra final stage.
Something like that can be done with AM MAX II DSP with PWM
modulator. PWM output stage can be reinforced with extra mosfets,
a new 100-1000W final stage added and you've got a really strong
transmitter that's also efficient. I believe someone in scandinavia
has done that with am max II.
Linear amplifiers are highly inefficient.
It is much better to modulate the final stage of a AM transmitter
and keep final stage in a highly efficient (but non-linear) C
or D/E stage.
This is why what you want to do will generate a lot of heat.
By the way, if you want a 10W carrier, you need 40W peak amp.
The best would be to run your exciter in full power mode (CW)
and take the modulating voltage and use it to modulate a new
stronger extra final stage.
Something like that can be done with AM MAX II DSP with PWM
modulator. PWM output stage can be reinforced with extra mosfets,
a new 100-1000W final stage added and you've got a really strong
transmitter that's also efficient. I believe someone in scandinavia
has done that with am max II.
Best regards,
Marko - PCS Electronics
--------------------------------------------------------
Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128
Marko - PCS Electronics
--------------------------------------------------------
Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128
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- Location: Mayo, Ireland
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You can roll your own. Its a fun project.
Best regards,
Marko - PCS Electronics
--------------------------------------------------------
Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128
Marko - PCS Electronics
--------------------------------------------------------
Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128