[Elecraft] KPA1500 - temp reading drops 10C when under power

[Jeff Blaine]

Odds are not good there.  The antennas have a balun at the feedpoint, 
are on a tower 500 feet from the shack and the hardline runs under 
ground.  If there is common mode involved, it's some sort of new 
hyper-super-ultra-infina-deluxe type never before discovered on earth.

73/jeff/ac0c
alpha-charlie-zero-charlie
www.ac0c.com

On 18-Aug-18 7:12 AM, Bob McGraw K4TAX wrote:
> I'd say a bit of common mode current on the feed line.    I see that 
> from time to time with my KPA500 on certain bands/antennas.
>
> 73
>
> Bob, K4TAX
>
>
> On 8/17/2018 11:45 PM, Jeff Blaine wrote:
>> While running the KPA1500 in the SARTG tonight, I noticed that the 
>> temp reading drops about 10C when transmitting.  min fan speed 1.
>>
>> Seems to be related to power - at 1500W it's pretty close to 10C. At 
>> lower powers, it's less of a difference.  I don't recall seeing that 
>> before.
>>
>> Normal?
>>
>> 73/jeff/ac0c
>> alpha-charlie-zero-charlie
>> www.ac0c.com
>>
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