[Elecraft] K2: KPA100 fan issue + current question

[Don Wilhelm]

Jim,

I would expect that the current at 100 watts would be closer to 17 or 18 
amps.
Has the bias been set correctly for a 400mA rise in PA current with no 
RF input?  That bias setting will alter the operating class of the 
amplifier and it must be correct to be linear.

73,
Don W3FPR

On 11/9/2018 11:46 AM, Jim KO5V wrote:
> Well, after checking that all of the components in the fan circuit were correct, I decided to follow Don's usual advice about checking my soldering, so I re-flowed all of their joints. None looked bad, but now the fan works as it should, so...
> 
> I'm still curious about my 11A @ 100W measurement. I think I'll borrow a friend's DMM and see if I get the same voltage measurement across R1
> (unless 11A is in the ballpark).