Pulling hot air OUT!!!!!
Curt
KU8L
Ron wrote:
Jim,
The old standard question, which direction should the fan run? I have fans on my
TR-7/PS-7 pulling out. The "new" PS-7 is directed in.
I agree with you 100% on cooling the filter caps. They get a lot of stress. During the Drake Engineers reunion at the Dayton Hamvention I had the good fortune to speak with one of the guys who helped engineered the PS-7. He indicated people have misunderstanding about the PS-7 fan. Its purpose is to cool the filter caps, not the electronics.
TNX es 73,
Ron WD8SBB
--- On Tue, 9/20/11, Jim Shorney <[email protected]> wrote:
From: Jim Shorney <[email protected]>
Subject: Re: [Drakelist] FW: Drake PS-7 test ideas
To: "[email protected]" <[email protected]>
Date: Tuesday, September 20, 2011, 12:04 AM
On Mon, 19 Sep 2011 22:10:38 -0400,
Curt Nixon wrote:
what will probably be the first issue will be hum on
your transmit signal due to deteriorating main filter
caps. Exact
replacements are not to be reasonably found--minimum
order qty puts them
really out of reach and no one that I found stocks
them. There are a
couple of very similar replacements to be had and they
will fit in the
same frames and same top mounting hardware.
The best favor that can be done for those caps, whether new
or old, is to
install the accessory fan. It doesn't need to be an
authentic FA-7, it's a
common form factor.
73
-Jim
--
Ham Radio NU0C
Lincoln, Nebraska, U.S.S.A.
TR7/RV7/R7A/L7, TR6/RV6, T4XC/R4C/L4B, NCL2000, SB104A,
R390A, GT550A/RV550A, HyGain 3750, IBM PS/2 - all vintage,
all the time!
"Give a man a URL, and he will learn for an hour; teach him
to Google, and he will learn for a lifetime."
HyGain 3750 User's Group - http://groups.yahoo.com/group/HyGain_3750/
http://incolor.inetnebr.com/jshorney
http://www.nebraskaghosts.org
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