[Elecraft] K2: KPA100 fan issue + current question

[Jim KO5V]

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).

73, Jim KO5V

-----Forwarded Message-----
>From: Jim KO5V <ko5v at earthlink.net>
>Sent: Nov 8, 2018 2:11 PM
>To: Elecraft List <elecraft at mailman.qth.net>
>Subject: K2: KPA100 fan issue + current question
>
>I just finished building and testing the KPA100 that goes with K2 #7225. This kit was a rev C, and I have brought it up to the latest specs. U1 says PA 1.1.
>
>#1: It has passed all of the tests, except it apparently has no low fan speed. I have set the temperature of the heat sink using CAL tPA, after measuring it with an IR thermometer, and I have set and re-set the fan parameters in the secondary menu. On "nor" and on "LoHi" the fan is off. On "Hi" it runs. I have tested the amp's output into my power meter at 100w, but I haven't transmitted long enough to really heat anything up.
>
>When I first applied power to the KPA100 for the initial tests, I believe the fan ran at low speed, so I have probably broken something...
>
>#2: When I key the amp at 100w, through the power meter, and into a dummy load, I measure about .055v across R7, so that's ~11A. I expected higher current. Does that seem about right?
>
>Any insight would be appreciated.
>
>Thanks in advance, & 73,
>
>Jim KO5V