[Elecraft] KPA500 - Advantage of min fan speed?

Don Wilhelm donwilh at embarqmail.com
Wed Oct 2 10:46:11 EDT 2019


Bob,

The problem with that is the fan must continue to run for some time 
after the return to RX so the residual heat from the TX cycle can be 
reduced.

73,
Don W3FPR

On 10/2/2019 10:12 AM, Bob wrote:
> Personally, I wish Elecraft offered a slightly different approach, rather
> than a minimum fan speed setting, how about a RX minimum and TX minimum?
> This would allow quiet operation on RX, but would anticipate a higher
> demand for cooling on TX.
> 
> There is quite a bit of thermal mass and overshoot that happens in TX on
> digital modes.  By the time the fan turns on, it tends to be running behind
> the curve trying to catch up.  Starting the fan running as soon as the rig
> goes into TX would help considerably and allow things to go back to quiet
> in RX.
> 


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