[Elecraft] K3 pwr out on digimodes

[hb9ari]

Benson,

I've done some measurements some time ago with my K3 #1212 and i had the 
following values:
K3 power set to 20W, f=7.040MHz   25W 50 Ohms dummy load 
MCE/Weinschel    LP-100A Wattmeter
mode USB   1 kHz sine audio at rear line-input, level adjusted to have 
the desired ALC bar configuration

ALC bar(s)           Mesured [W] (avg)
0                             8.16
1 blinking                  9.4
1steady+1blk         15.95
2steady+1blk         20.72
3steady+1blk         21.2

These values correspond to the above mentioned set-up (K3 #1212 uP rev 
2.78) and displayed on the LP-100A with RF head #1143

73 QRO fr Rudolf, HB9ARI


Benson wrote:
> I do not have the benefit of an external wattmeter at the moment and 
> frequently use digital modes, esp. JT65A. Assuming I want to transmit 
> 25 W or less, if I have PWR set at 25 and adjust the mic gain for ALC 
> just under 1 bar (basically just until one bar disappears), 
> approximately how much power would be  transmitted? The resolution of 
> the 100W rf scale doesn't really help at low levels.
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