[CQ-Contest] Switching Power Supplies

[K9MA]

I did a very simple mod to 1235M:  A resistor in parallel with the 
thermostat. This causes the fan to run continuously at low speed, rather 
than cycling when demand is low. The fan runs at full speed only during 
times when I'm transmitting a lot, when the fans in the radio and 
amplifier drown it out.

The 1235P-M may be different, but I doubt it has a variable speed fan, 
or this mod wouldn't be necessary.

73,

Scott K9MA



On 11/12/2024 8:00 PM, Steve Dyer W1SRD via CQ-Contest wrote:
> My only gripe with the 1235P-M is the fan noise. Good PS otherwise.
> 73,
> Steve 


-- 
Scott  K9MA

k9ma at sdellington.us