-----Original Message-----
From: DARYL L NOEL <w4ec@juno.com>
To: tentec@contesting.com <tentec@contesting.com>
To: <tentec@contesting.com>
Date: Sunday, January 04, 1998 3:11 PM
Subject: [TenTec] Titan in a rack
>Hello Steve,
>
>After reading your memo about using the rack mount for the Omni VI+,
>Titan 425, and Automatic antenna coupler, I was wondering if you had any
>problem with heat from the Titan amp Eimac tubes?? The following is what
>I did to remedy any heat build up problem.
>
>I had a similar configuration with the Hercules II amp. The Omni VI on
>bottom, blank spacer, Herc II in the middle and the Auto antenna tuner on
>top. Heat dissipation was not a problem. I then purchased a Titan 425.
>The folks at TenTec said that you should have at least 5-7 inches of air
>space above the Titan because of the Eimac tubes, if this was to be used
>in a rack mount environment.
>
>Putting the Titan on top with the blank spacer still only gives you 2-3
>inches of air space for the Eimac tubes. To be on the safe side, I
>wanted more space with more air circulation. I found a set of 19" rack
>mount fans with a stainless steel front grille. There were three fans
>built on the unit, it was the same height (5 1/4") as the Auto antenna
>tuner. This was perfect for what I was wanting to do.
>
>The configuration I now have is the Omni VI on the bottom, a 1 3/4" blank
>spacer, Titan amp, and rack mount fans. All that you see at the top is a
>stainless steel grille with a washable air filter. I debated trying to
>put the fans on the rear of the rack mount in different configurations,
>but decided against it. The air is pulled in from the front and blows
>out over the rear of the Titan, moving the hot air that is there. The
>Auto antenna tuner is now setting in a different place.
>
>The fans are ac and I bought a dimmer switch/fan speed control switch and
>mounted it in an electric box with an attached outlet. Now instead of
>having the fans run at full speed all the time, I can adjust the RPM's on
>them so they will not be as noisy.
>
>73's
>Daryl W4EC
Hi Daryl, Well that was a pretty niffty Idea... I guess common sense would
tell a guy those Eimac tubes would need some better circulation :-) Heck I
felt blessed to get the rack (2 months + then delievered to the house that
was being demolished :-) let alone get any tech advice. Thank you for
writing with that story, Ive been talked into putting some fans in
there....Oh I like the idea of the dimmer switch/fan (nice touch) altho I
couldnt imagine being able to here the fans over the Titan and the auto
antenna coupler...Well I will be looking for some fans at the next
swapmeet....Take Care!
Steve N6TT
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