[Elecraft] KPA1500 Questions + RFE

[Andy Durbin]

"Is there a downside to using a very long FAN DWELL TIME, other than noise?  I am trying to get my amp to run cooler."

Your question seems to imply that you believe increased dwell will make the KPA1500 run cooler.  I wonder if you have any test data that supports that assumption.  My testing of my KPA500 showed no significant advantage to pre-cool or increased dwell but I don't claim to have explored all possible operating conditions.  I suspect that the most effective way to reduce temperature will be to lower the fan speed temperature set points.  There is a trade-off between temperature and noise.  The recent increase in the KPA1500 fan setpoints seems to suggest that Elecraft has chosen to reduce noise.

Yes, there is a downside to very long fan dwell time.  The fans will run longer and therefore wear out quicker.  Why do it unless you have data that shows some advantage?   "FANticipator" may help:  - https://tinyurl.com/y4tw92zz.

Andy, k3wyc