Amps
[Top] [All Lists]

Re: [Amps] Fan sounds like F-15

To: amps <amps@contesting.com>
Subject: Re: [Amps] Fan sounds like F-15
From: KA4INM <ka4inm@gmail.com>
Reply-to: ka4inm@gmail.com
Date: Sun, 24 Nov 2013 15:53:07 -0500
List-post: <amps@contesting.com">mailto:amps@contesting.com>
On 11/21/13 11:32, Vic K2VCO wrote:

    I've been using my new 4CX1000A amplifier for a few days. It works great.
    But  there is one problem that I need to solve: the fan -- it's a flat
    centrifugal type -- here's a construction photo from my website:
    [1]<http://www.qsl.net/k2vco/4CX1000A/Underside.jpg>
    which provides somewhat more air than is needed. But it also provides more
    noise  than  is  needed,  somewhat  like  an F-15 pilot kicking on his
    afterburner. OK, a little exaggeration. But not much.
    I would like to implement a thermostatic control system. I envision a sensor
    stuck in the chimney above the tube that would operate a relay to switch the
    fan from low to high speed.
    Has  anyone  done  this?  What  kind of sensor should I look for? What
    temperature should it switch at? The fan is an AC motor with a capacitor
    across half of the field -- is it safe to reduce speed by putting a resistor
    in series with the motor?
    I know a simple solution would be to remote the fan, but it would mean
    building a new amplifier! And good noise-cancelling phones cost $300.

Block off half or three quarters of the blowers air intake to unload the motor.
--
  Ron  KA4INM - Youvan's corollary:
                Every action results in unwanted side effects.
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps

<Prev in Thread] Current Thread [Next in Thread>