[Elecraft] KPA1500 power aupply fan

[dick at elecraft.com]

If the amp is on, you should be able to press the RF deck "ON" button at the
bottom right of the RF deck front panel, the LEDs and LCD should go dark,
all relays should be released, and power supply fans should stop. The only
visible LED is the green light on the power supply.

Press ON when the amp is off, and it turns on.

When "off", only a small power supply (without fan) provides enough for the
microcontroller to wake up on power button press or a number of other ways
to turn the amp on.

There are a few ways to turn the unit on besides the front panel button.
Supplying 12V to a rear connector, pulling down a pin on the ACC connector,
data from a PC to the USB host port, etc.

If you're supplying 12V to the rear connector, it should turn the amp on
until the 12V drops.  Some people use the 12V RCA output on the K3 (also
used to power the P3) to turn their amp on with the K3.

73 de Dick, K6KR

-----Original Message-----
From: elecraft-bounces at mailman.qth.net <elecraft-bounces at mailman.qth.net> On
Behalf Of Rick Stealey
Sent: Monday, October 1, 2018 14:44
To: Elecraft at mailman.qth.net
Subject: [Elecraft] KPA1500 power aupply fan

K2XT here.  Greetings,
We are installing K8DM's brand new KPA1500 here at my qth today replacing a
KPA500.
He runs the station remotely from VA; my QTH is in NJ.
(I host the station for him).

So, it is powered up and running.  When not in use it appears as if
(according to the manual) it needs to generate a small voltage/current to
the rf deck to allow it to function.  No problem, that makes sense.
The problem is, there is a fan running in the power supply, and it is
annoying!  The remote station is in a spare bedroom and visiting guests will
have to endure this noise.  Plus, I'd like the equipment to go off when it
is turned off.  I don't want a fan running 24/365.  Does the PS really
generate that much heat that it needs a fan?

This is not acceptable.  Wayne, surely you didn't design it this way.
Surely there is an option we set somewhere to disable the fan.

What say, anyone?

Rick  K2XT
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