[Swan] Cooling of thy Swan

Thu, 19 Feb 2004 19:05:53 -0800

I do exactly the same thing as "Ken, WA2LBI" with my Swan 350. Muffin fan
sitting over finals "pulling" hot air out. I even use switchable dropping
resistors for reduced speed/noise. 12v outside power source.
My 350 stays at room temp no matter how much heat the finals emit on xmit.
Stable temp=stable freq. on my rig. I put stick-on rubber feet on my fan to
protect cabinet. Cool tune-ups too. I have had same finals for
over 10 years.

ac6ts
----- Original Message -----
From: "Ken, WA2LBI" <[email protected]>
To: "Peter Veach" <[email protected]>
Cc: <[email protected]>
Sent: Thursday, February 19, 2004 5:21 PM
Subject: Re: [Swan] Cooling of thy Swan

> Peter,
>
> I have a Swan 500cx and use an outboard fan sitting on top of the rig
directly
> above the finals. Since hot air rises I have the fan oriented to draw the
hot
> air out of, not blow air into, the chassis. The fan has a thin foam strip
on
> the surfaces that contact the cabinet so the finish is protected. My
WM-1500
> watt meter sits on top of the rig directly in front of the fan so it (the
fan)
> is barely visible from the operating position.
>
> The fan is a 12VDC computer type, approximately 5" square, and is run at
reduced
> speed via a dropping resistor. That keeps down the racket (jet turbine
sound!)
> but moves enough air to keep the rig cool. The power is obtained from a
12VDC
> supply that runs ancillary items around the shack such as meter lights,
etc.
> You could also obtain the power from the filament line. Another common
solution
> is to use two 120VAC fans in series. In that case you could put one on a
second
> rig.
>
> I haven't checked the size but there are some rather small 12VDC fans may
fit on
> the rear screen of the 500cx final cage. I would try to mount two of them
side
> by side oriented to pull the air out and run them in series at 12VDC. If
that
> worked it would be invisible from the front of the rig.
>
> Good luck and keep us posted on the solution you select.
>
> Ken, WA2LBI
> [email protected]
>
>
>
> Quoting Peter Veach <[email protected]>:
>
> > I have been giving some thought to mounting cooling fans to all of my
> > Swans. I feel the benefit would be a far more stable radio, not to
> > mention longer life. Before I start this, I was wondering if you folks
> > have some input as to how you have done this, what kind of fans have
> > you tried, and how are you powering the fan.
> >
> > Thanks for any input. I think this is a worth while topic. Proper
> > cooling should improve the performance of these beauty's.
> >
> > _______________________________________________
> > Swan mailing list
> > [email protected]
> > http://mailman.qth.net/mailman/listinfo/swan
> >
>
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