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Re: [CQ-Contest] Switching Power Supplies

To: cq-contest@contesting.com
Subject: Re: [CQ-Contest] Switching Power Supplies
From: K9MA <k9ma@sdellington.us>
Date: Wed, 13 Nov 2024 11:47:11 -0600
List-post: <mailto:cq-contest@contesting.com>
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@sdellington.us
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