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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