Tuesday, November 13, 2012

Re: [HamBrewers] Power-off delay circuit

 

Arvind,

In a 10A dual PS, the fan was always On and the sound drove me nuts. I salvaged a thermal cut off from an old Yaesu battery pack and wired a relay to invert the action. The cut off opens at about 46C. Now the PS fan comes on only when on high load.

Cheers and Happy Deepavali to all celebrating.

Raj, vu2zap

At 13-11-2012, you wrote:

I smell a QROO linear being brewed ;-). Please check the various amp [bias control, metering and protection] board which also include this feature you are requesting to control the blowers using microcontrollers. There are 3 amp mailing list from which you can digout stuff

amps@contesting.com

ham_amplifiers@yahoogroups.com

rfamplifiers@yahoogroups.com

73

Aravind

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