think too much.
73, Dick KF4NS
St Petersburg, FL 33714 USA
Keep The Glow!
- Original Message -
From: "Tom Holmes"
To: "'Dick KF4NS'" ;
Sent: Thursday, October 28, 2010 9:26 AM
Subject: RE: [Drakelist] T-4X fan mod
HI Dick...
Well, having more voltag
0 4:15 PM
> To: Tom Holmes; drakelist@zerobeat.net
> Subject: Re: [Drakelist] T-4X fan mod
>
> OH BUGGERS !
>
> Tom, you are absolutely right. I know very little about fans and their
> design. Never gave it a thought. It is a brushless. Oh well, I will
> give the full wave m
the enlightening.
73, Dick KF4NS
St Petersburg, FL 33714 USA
Keep The Glow!
- Original Message -
From: "Tom Holmes"
To: "'Dick KF4NS'" ;
Sent: Wednesday, October 27, 2010 10:16 AM
Subject: RE: [Drakelist] T-4X fan mod
Hi Dick...
I am guessing that your
kelist-boun...@zerobeat.net
[mailto:drakelist-boun...@zerobeat.net]
> On Behalf Of Dick KF4NS
> Sent: Tuesday, October 26, 2010 7:08 PM
> To: drakelist@zerobeat.net
> Subject: Re: [Drakelist] T-4X fan mod
>
> Paul and all,
> I have had a 24vdc .06A fan on the back of my TR4C cage f
elist] T-4X fan mod
Message-ID: <46ac0.5f81cd0b.39f78...@aol.com>
Content-Type: text/plain; charset="us-ascii"
I found two articles on adding a fan to a T-4X. The first one uses
only a
diode & capacitor and uses the size of the capacitor to control the
amplitude of t
Fellow Drake enthusiasts,
I too have been using 220v fans for various cooling purposes of Drake
equipment, especially the power supplies for the L4, L4B, and L7 linears.
However, NOT all 220 v fans will start and run reliably on 110 vac. Through
experimentation and multiple purchases, I fou
Paul -
That pretty well says it!
Re receivers I've run R-4/A/B/C for years, 24/7, and never had a
transformer failure. I really believe the only failures are caused by
an oversize fuse, put in either because the correct one was not at hand
or just too cheap to buy some, and a filter ca
Remember, for the T4x series cages, that 80mm fan mounting holes match
up perfectly with the cage perforations..so no holes needed.
curt
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Drakelist@zerobeat.net
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Do not forget that 220VAC fans run very nicely at 120v and
are very quiet. They move just enought air and are
typically avaialbe cheap at ham fests because no one
usually wants 220V fans...
73
Gene K1NR
On Mon, 25 Oct 2010 22:53:34 EDT
ph...@aol.com wrote:
> OK, as I see it there are several
PULL THE AIR OUT>>
One my twins, I can lay my hand on top right over either the PA cage or
the audio output/transformer area, and I cannot tell they are on. I
also cannot hear the fans running...Nothing fancy just modern 80mm QUIET
fans.
The R4B fan is installed behind the gap between the B
On Mon, 25 Oct 2010 21:23:06 -0500, Don Cunningham wrote:
> I put foam all around the bottom, forming a good seal and making it pull all
> its air out of the cabinet. The foam also eliminates vibration noise from
> the fans.
Thin weather strip foam from the hardware store works well.
>If yo
OK, as I see it there are several choices:
FAN DIRECTION: Draw air out of the unit. (No real choice there)
FAN LOCATION: T-4X - Top *OR* back. Back may have a slight advantage of
a "cleaner" air flow (less turbulence). Also, fan can be attached directly
to rear cage and so is "always
Paul,
My personal preference is to put one fan over the T4X (T4XB, XC, etc) AND one
over the R4 (whichever variation). Both tend to run hot, and the transformer
on the R4 will get VERY hot without the assist. I put foam all around the
bottom, forming a good seal and making it pull all its air
Paul -
Out the back is fine. You're NOT 'cooling the PA tubes' so much as just
getting the heated air out of and away from the cage. UP is perhaps
better, although unless you take the transmitter out of the cabinet
you're dealing with TWO perforated pieces of metal that do NOT align, so
any
Absolutely.
Pulling the air out of the PA from the top is a good way
to use the natural convection of the rising hot air in
conjunction with the fan. It makes a world of difference.
73,
Gene K1NR
On Mon, 25 Oct 2010 22:11:33 -0400
Garey Barrell wrote:
> Absolutely!!
>
> 73, Garey - K4OAH
That was my thought, too, especially since a fan mounted on the back of
the PA cage and blowing in would cool the two PA tubes unequally; e.g., one
of the tubes "blocks" the direct air from the fan from reaching the other.
And, I think unequal cooling of a 2-tube PA is a rather bad idea (fr
Absolutely!!
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 2-C/2-NT, 4-B, C-Line&
TR-4/C Service Supplement CDs
Don Cunningham wrote:
Suck the hot air out, Paul, don't force it into the PTO and other
areas to make drift even worse. The rig was designed for convection
to take the hot air out.
Suck the hot air out, Paul, don't force it into the PTO and other areas to make
drift even worse. The rig was designed for convection to take the hot air out.
It will run MUCH cooler pulling the hot air out and as you said, not get so
dirty inside.
73,
Don, WB5HAK__
I found two articles on adding a fan to a T-4X. The first one uses only a
diode & capacitor and uses the size of the capacitor to control the
amplitude of the half-wave rectified DC voltage. The fan is configured to
draw
air OUT of the PA enclosure.
_http://www.wb4hfn.com/DRAKE/DrakeArti
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