November 1st 08, 02:17 PM
posted to rec.radio.shortwave
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First recorded activity by RadioBanter: Jun 2008
Posts: 1,183
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KFI transmitter off the air
Billy Burpelson wrote:
Telamon wrote:
So what is the voltage out the finals on a solid state transmitter?
Do you mean the DC voltage on the collectors of the output transistors
or the RF voltage into the feed line?
Telamon wrote:
Ok, Don't call the modules "finals" then but what is the output
voltage to the antenna? I would like to know what the RF current is as
the output is supposed to be 50KW.
I'm surprised a smart person like you isn't familiar with Ohm's law...
To find the RF voltage for a 50 kW transmitter, assuming a 50 ohm
transmission line:
Simple Ohm's Law:
V= the square root of (RxW) (V=volts, W=watts, R=feed line impedance in
ohms...assume 50 ohms)
To find the current:
I= the square root of (W/R)
Sometimes you're just to, too, two clueless. :-)
This is even simpler:
http://www.sengpielaudio.com/calculator-ohm.htm
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