[Elecraft] Power out vs current

[k6se@juno.com]

Ron, ZL1TW wrote:

"I just repaired linear power supply for a fellow ham here and seeng as
it has an Ammeter on the front panel I decided to see if I had any one
band more "power" efficient than any other.

Here is what I got on the sampled bands.( using the K2/100)
 80m   110w   15 amps
 40m   110w   14 amps
 20m   110w   14 amps
 15m   110w   17 amps
 10m    99w    15 amps

Voltage on the power supply was 13.55v"
==========
When I built my KPA100, on the test that has you measure the voltage drop
across the .005 ohm current sensing resistor, the current drawn by the PA
transistors ranged from about 10 amps to 14 amps, depending on the band,
when transmitting full power (100 watts + on all bands) into a 50-ohm
dummy load.  Add the current required by the rest of the radio for the
total current drawn from the power supply (13.85 VDC in my case).  I do
recall that the band where the greatest current drain occurred was 80
meters.

73, de Earl, K6SE