[Elecraft] K3 PA temp acting up

[Buck k4ia]

Don - thanks

If I let it sit while turned on, the fan will bring the temp down, then 
I can turn the power back up and operate at 100w.  The fans keep the PA 
temp around 45C.  So I don't think the finals have gone - yet.

It is drawing about 2 amps with the power turned off but plugged in and 
a little under 4 amps in receive when turned on.

I was biased toward the bias but don't understand why it is drawing 2 
amps of current while turned off.

I have not installed the gold connector mod yet.  KPA3CONMDKT  Any 
chance the problem is there?

Buck
k4ia
K3 # 101  KX3 #715

On 4/27/2013 7:56 PM, Don Wilhelm wrote:
> Buck,
> If indeed the finals are heating while the K3 is truly in receive mode,
> then that would indicate either the PA finals have 'turned belly up' or
> that there is a failure in the bias circuits that is turning the PA
> transistors on.
> First unplug everything from the K3 except for a dummy load.  Then plug
> it in and see if it still draws PA current
> If you have the same problem with everything unplugged, an email to
> K3support is in order (or a phone call after they wake up and have their
> morning beverage Monday morning.
>
> 73,
> Don W3FPR
>
> On 4/27/2013 7:11 PM, Buck k4ia wrote:
>> Left the receiver on overnight and when I came down this morning I
>> could hear the fan running.  That's odd.  PA TEMP 45
>>
>> If I turn off the power, the finals still heat up and when I turn the
>> power back on the HI TEMP warning activates, power is reduced and the
>> PA TEMP reads 105.  Only way to cool it down is to unplug the power.
>>
>> Any ideas?
>>
>>
>