[Icom] PS-125 Mods - zener diode

Thu, 13 Feb 2003 09:46:06 -0700

Was this done leaving the original fan? Is it possible to get a picture of
where to place the diode.  there is not schematic in the small manual that
came with my PS-125.
73,
Ken W7TS

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Kenneth E.  Kinyon
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Longmont, CO 80503-2106
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ALPCA #8339
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-----Original Message-----
From: [email protected] [mailto:[email protected]]On
Behalf Of kevin schuchmann
Sent: Sunday, February 09, 2003 12:04
To: [email protected]
Subject: Re: [Icom] PS-125 Mods

Hi Dave,
    another mod  which I like better  is putting a 6.8 1w zener across Q14,
Q14 is the control transistor for the fan,
this way the fan runs all the time but at a low quiet level, then if things
really  get hot Q14 conducts and the fan can still go to
full speed...

btw this idea was wa2rpi's,   and has worked well here for about a year...

73's
Kevin
wa6fwf