I put two 120 volt fans in series in one cabinet.
Nice and quiet with a gentle air flow.
John J. Riddell wrote:
Kevin, another method of slowing down an AC fan is to put a capacitor
in series with the AC leads as a voltage dropping element.
* A local Ham played with this idea many
: Sunday, December 21, 2008 9:38 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Re: fan timer circuit
Maybe it's just me, but I've never understood the need for a special circuit
to run cooling fans.
I run my fans from the PTT line using a relay. I have also used a simple
, December 21, 2008 9:38 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Re: fan timer circuit
Maybe it's just me, but I've never understood the need for a special circuit
to run cooling fans.
I run my fans from the PTT line using a relay. I have also used a simple
chassis
Perfect Joe, just what I have been looking for.
tom
[Original Message]
From: Joe k1ike_m...@snet.net
To: Repeater-Builder@yahoogroups.com
Date: 12/21/2008 10:05:17 PM
Subject: Re: [Repeater-Builder] Re: fan timer circuit
This is a simple timer that I used on my 222 repeater. When
Re: fan timer circuit
I've seen a number of fan delay, time on, time off circuits
posted on web. The neat'o web page url I just posted here
on the group has one and it might be the one you're looking
for.
http://www.w1ghz.org/small_proj/small_proj.htm
and the fan controller
- Original Message -
From: skipp025 skipp...@yahoo.com
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, December 21, 2008 12:24 PM
Subject: [Repeater-Builder] Re: fan timer circuit
Re: fan timer circuit
I've seen a number of fan delay, time on, time off circuits
posted on web
At 12/21/2008 09:24, you wrote:
Some of our local start-up radio clubs throwing repeater
packages in place often start out using and stay with an
external RF amplifier designed for mobile operation. Sometimes
the amp runs so hot you can't keep your hand on the heat sink
but I've yet to see one
-
From: skipp025 skipp...@...
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, December 21, 2008 12:24 PM
Subject: [Repeater-Builder] Re: fan timer circuit
Re: fan timer circuit
I've seen a number of fan delay, time on, time off circuits
posted on web. The neat'o web page url I just
: wb6fly wb6...@verizon.net
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, December 21, 2008 4:27 PM
Subject: [Repeater-Builder] Re: fan timer circuit
I mostly agree. My thinking is that a fan that runs continuously
wastes power and draws dust and dirt into the equipment. I also
believe
One Summer's day in Los Angeles I had a service
call on a microwave repeater (vacuum tube).
It was located in a warehouse, near the roof.
In the heat I lugged my stuff up the stairs.
As I set down the service monitor I leaned
my other arm against the cabinet. I jerked
it away because it was
Sounds like the best thing to do is a combination of both the PTT and
Thermodisk versions together.
That way the fan starts blowing when users start using the repeater.
Then the thermodisk takes over after it heats up until all traffic quits and
the tx'er cools down.
Just my 2c worth.
Merry
At 12/21/2008 14:01, you wrote:
I moved over to utilizing the PTT instead of the thermostat disks after I'd
had a few thermostats fail. But I agree with your thinking.
My thoughts as well: the thermostat is an elegant solution, but if it
fails, your repeater fails in a rather expensive way. One
n...@no6b.com wrote:
One reason why I've dismissed using any switching on my 110 V cooling fans
let them spin 24/7.
I have used 220 V muffin fans on 110 V and they last for years. I put
one in service in 1997, and it's still turning.
Kevin
to the fan.
73 John VE3AMZ
- Original Message -
From: Kevin Custer
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, December 21, 2008 8:58 PM
Subject: Re: [Repeater-Builder] Re: fan timer circuit
n...@no6b.com wrote:
One reason why I've dismissed using any switching
One more thing to be careful of when using fans on remote equipment.
Make sure there are guards on both sides of the fan. We had a muffin
fan on a 100wt 220 amp that failed when a mouse tried to get closer to
the warm heatsink. His carcass jammed the fan blades and got dessicated
with the
m...
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Burt Lang
Sent: Sunday, December 21, 2008 10:39 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Re: fan timer circuit
One more thing to be careful of when
a mouse tried to get closer to
the warm heatsink. His carcass jammed the fan blades and got dessicated
with the heat.
Burt Lang VE2BMQ
Yes I guess that could Happen , I live in a City and My 6 Month old
Fridge quit working , Well of Course bring a Ham Some of us including
Me thing We can
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