Thanks, guys. Am only concerned with transmit and wondering if the amperage drops proportionally as the output power is decreased, or is it skewed in some way?
Amperage depends on antenna SWR too. Mike
Well, thats a bass ackwards observation.
It really depends on actual transmitter output power (which may vary with VSWR).
I think this can be worked out with Ohm's law (& maybe another equation) to give you data you could then plot on a graph-chart, & instantly know the current demands for your desired output.If a transceiver requires 23 amps at full power (100 watts) to transmit, is it safe to say it will need about 11.5 amps at 50% power and 2.3 at 10%? Or is the progression different for some reason?
I think this can be worked out with Ohm's law (& maybe another equation) to give you data you could then plot on a graph-chart, & instantly know the current demands for your desired output.
But, change one variable (like input voltage) and the whole chart would have to be re-worked.
Someone smarter than me will have to bring the required intellect to explain this further.
A formula exists just for this question; that much I'm sure of.
-LeapFrog
I agree with CK, after thinking about it.Ohm's Law does not apply here at all. If one wanted to know current draw versus power output then simply insert an ammeter in the power cord and record the current at various power levels. If a power supply of sufficient amperage is used to allow full power operation, and that SHOULD be the case, everything else is moot.
Ohm's Law does not apply here at all. If one wanted to know current draw versus power output then simply insert an ammeter in the power cord and record the current at various power levels. The efficiency of the RF power amp changes with output levels and is most efficient at full output. I have to ask WHY is this even being asked at all? If a power supply of sufficient amperage is used to allow full power operation, and that SHOULD be the case, everything else is moot.
I don't get it, what is the problem to use 23A+ PS?
Mike