Hi Dick:
Got a batch from Tigerdirect.com They are very fast to ship..excellent
website, and good prices over the long haul. I pretty much use them for
all PC related stuff over the course of several years now.
Also bought a couple on eBay but the cost ended up being nearly same
and shipping weas actually slower. I think Tiger comes from Chicago
area if I recall..they get stuff to me the second day after order even
with just ground standard delivery.
I see the price for the ones I got is now 10.99. IXP 5414 14dBA
32CFM. THese are the ones I used most of...the Thermister controlled
speed version is IXP 5414T and a dollar more.
I believe that the IXP5211 18CFM version would be plenty for the AC4 But
same price.
I got mine on a sale about a year ago or more but I have also seen them
on line for that 7-8 dollar figure. Shipping makes the prices all about
the same.
I didn't shop for the absolute lowest price on these..I do alot of
business with Tiger so just got about a dozen of these from them.
Curt
Dick KF4NS wrote:
Thanks Curt, I appreciate the thoroughness of your reply. Where do
you buy the silenx fans? I will most likely get 2 of the 80/80 and
maybe 2 of the 60. On the company website they give retailers but all
are selling them for around $12 or more. What model numbers do you have?
73, Dick KF4NS
St Petersburg, FL 33714 USA
Keep The Glow!
----- Original Message ----- From: "Curt Nixon" <cptc...@flash.net>
To: "Dick KF4NS" <kf4nsra...@verizon.net>
Cc: "DrakeRadio list" <drakera...@yahoogroups.com>; "Drake list at
zerobeat" <drakelist@zerobeat.net>; <dr...@mailman.qth.net>
Sent: Monday, December 13, 2010 7:02 PM
Subject: Re: [Drakelist] AC4 heat
Generally, transformers can and do run hot enough that you can't
leave your hand on them for very long. They will be fine like
this..but...heat does deteriorate plastics and varnishes like that
used inside. Electrolytic caps also have reduced lifetimes depending
on heat. So I have elected to add a silenx super quiet fan to my
AC4. I drilled a series of holes in a pattern to match the 80mm
fan. The fan is mounted on one end of the long side of the aluminum
cover. It has holes along the sides to allow air IN so the fan draws
air OUT. If you want to see pictures of this, I can take a few.
I agonized over doing this to the cover but have no regrets at this
point...The PS runs cool enough that it is hard to tell it is on. It
still fits inside the MS4 if required, and is dead quiet. These
silenx fans are about 7.00 bucks.
I added similar fan to the PS for my TR7 as well. Many commercial
power supplies use fans for continuous operation even though the
transformers are rated to run at elevated temperatures.
FWIW
Curt
KU8L
Dick KF4NS wrote:
A while back I recall a discussion about the heat in the AC4/AC4R.
Now that my rig is back in the shelf along with the PS in the MS-4,
I notice that the back of the AC4R is too hot to touch for more than
a couple seconds. I worry about cooking the xfmr too much.
I could put a fan on the rear apron, and if so, is there a
preference on the location? Also, would it make any difference which
direction the air flow goes?
73, Dick KF4NS
St Petersburg, FL 33714 USA
Keep The Glow!
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