This is a low tech and improvised approach. Use a small, low CF/min muffin
Fan from a computer; put some rubber pads on it so that it will exhaust upward
and set the fan on top of the cabinet above the final tubes.
Kris KA2OIG Merschrod
123 Warren Road
Ithaca, NY 14850
(607) 257-1734
That is what I do. I use a 24VDC computer fan and run it at 12VDC. Effective
and quiet. Be sure to have it blow upward.
73,
Bob WW3QB
--- On Fri, 5/29/09, Kris Merschrod k...@merschrod.net wrote:
From: Kris Merschrod k...@merschrod.net
Subject: Re: [Drakelist] (no subject) cooling fan for
Yes, by all means draw the heat away. I was lucky enough to find a 115V AC
muffin fan and just put it into the power strip. I like Bob's 12 V into a
24 V for slower motion. It really does not take much movement to do the
job.
Although I have not tried it, you could probably put the fan on
In my past, I used Drake twins on RTTY and ran two 115v fans in series, one
over the final compartment and one over the PTO area to draw out the heat.
They turn slowly, but fast enough to aid the natural convection, and I never
had any trouble with excess heat. Of course, I was running the
A 220VAC run on 120V will do the same trick. Moves air and
is relatively quiet. Lots of 220V fans at the flea markets
for cheap.
Fans should generally be mounted in such a manner as to
take advantage of any natural convection. A perfect
location is above the cage for the finals pulling the
Yep, I've used a 220V muffin wired to 120 on my T4X-C for 30 years.
Just pull the cover off the case every year and use canned air to blow
the dust out and off of components. Dust WILL collect under the chassis
too... (Yank the power supply connector before doing this!)
Chuck, AC7Z
Don
I ran multiple A and B lines 24/7 back in the 60s for autostart RTTY nodes.
The transmitters ran full power, approximately 125W output on 14.075
MHz, often with relay transmissions of 30 minutes or more key down.
Each transmitter had a small fan mounted on the back of the final cage,
blowing
Sorry, my call is AC7GZ. Typo.
Charles Cassidy wrote:
Yep, I've used a 220V muffin wired to 120 on my T4X-C for 30 years.
Just pull the cover off the case every year and use canned air to
blow the dust out and off of components. Dust WILL collect under the
chassis too... (Yank the power
Please remove my name from the active list.
thanks
dale wt4t
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Mount a small 3 inch 12 volt fan on the back of the PA cage, the holes match up
without any modification to the cage. Take 12 ac from the filament supply
somewhere under the chassis and run it through a diode to a small electrolytic.
The size of the electrolytic will actually decide the fan
On Fri, 29 May 2009 17:26:18 -0400, Gary Poland wrote:
Mount a small 3 inch 12 volt fan on the back of the PA cage, the holes match
up without any modification to the cage. Take 12 ac from the filament supply
somewhere under the chassis and run it through a diode to a small
electrolytic. The
Drake Listers,
I am in need of the following for the Drake TR-270
accessories. I have the radio with the options installed,
but I have misplaced the SW and Manuals. So I need:
1) Manual for TNC-270
2) SW for the TNC-270
3) Manual for the DEMOD270
4) SW for the DEMOD270
I did
WTB: Transmit Exciter board for TR 7.
Please advise condition and price. Thanks.
Barry
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Is Sindre Torp still on the mail list ?
73
Gene K1NR
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Get hold of Charlie Talbot, K3ICH._pin...@erols.com_
(mailto:pin...@erols.com)He parts out TR-7s and may have what you need.
73 and have a great weekend,
John, W4AWM
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