[NCC] Amplifier venting
Scott Detloff K8DX
k8dx@raex.com
Wed, 26 Sep 2001 17:22:05 -0400
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I'm in the process of designing a venting system for both of my=20
amplifiers, each using a pair of 3CX-800's in a SO2R environment.
The reason for doing this is twofold. Calling CQ continuously for 48
hours tends to increase the temperature of the amplifier itself, and=20
running additional cooling should help prolong the life of the tubes
as well as other components. The second is to regulate the shack
temperature. It seems I'm constantly making runs to open and close
the basement door that leads to the garage in cold weather, and causing
the AC to run excessively in the warm weather.
At Dayton this year, I bought three new identical squirrel cage fans. =20
They move LOTS of air, but are VERY noisy. My plan is to have an=20
HVAC company make hoods that would attach directly to the amplifier
case with double faced tape, right above the exhaust holes for the =
tubes.
>From the exhaust I'm planning on using the 4" flexible "tin-foil" type
ducting run above my drop ceiling, then out to the garage where the fan
can be mounted. Hopefully this would dramatically cut down on the=20
shack noise, having the fan so far away. =20
Any experiences you've had, or ideas that you have would be greatly
appreciated so I don't end up re-inventing the wheel! :-)
73...Scott
Scott Detloff K8DX
Paris, Ohio
Visit The North Coast Contesters @ www.qsl.net/ncc
Tour K8DX @ www.qsl.net/k8dx
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<DIV><FONT face=3DArial size=3D2>I'm in the process of designing a =
venting system=20
for both of my </FONT></DIV>
<DIV><FONT face=3DArial size=3D2>amplifiers, each using a pair of =
3CX-800's in=20
a SO2R environment.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>The reason for doing this is =
twofold. Calling=20
CQ continuously for 48</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>hours tends to increase the temperature =
of the=20
amplifier itself, and </FONT></DIV>
<DIV><FONT face=3DArial size=3D2>running additional cooling should help =
prolong the=20
life of the tubes</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>as well as other components. The =
second is to=20
regulate the shack</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>temperature. It seems I'm =
constantly making=20
runs to open and close</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>the </FONT><FONT face=3DArial =
size=3D2>basement door=20
that leads to the garage in cold weather, and causing</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>the AC to run excessively in the warm=20
weather.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>At Dayton this year, I bought three=20
new identical squirrel cage fans. </FONT></DIV>
<DIV><FONT face=3DArial size=3D2>They move LOTS of air, but are VERY =
noisy. My=20
plan is to have an </FONT></DIV>
<DIV><FONT face=3DArial size=3D2>HVAC company make hoods that would =
attach directly=20
to the amplifier</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>case with double faced tape, right =
above=20
the exhaust holes for the tubes.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>From the exhaust I'm planning on using =
the 4"=20
flexible "tin-foil" type</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>ducting run above my drop ceiling, then =
out to the=20
garage where the fan</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>can be mounted. Hopefully this =
would=20
dramatically cut down on the </FONT></DIV>
<DIV><FONT face=3DArial size=3D2>shack noise, having the fan so far=20
away. </FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Any experiences you've had, or ideas =
that you have=20
would be greatly</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>appreciated so I don't end up =
re-inventing the=20
wheel! :-)</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>73...Scott</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Scott Detloff K8DX<BR>Paris, =
Ohio<BR>Visit The=20
North Coast Contesters @ <A=20
href=3D"http://www.qsl.net/ncc">www.qsl.net/ncc</A><BR>Tour K8DX @ =
<A=20
href=3D"http://www.qsl.net/k8dx">www.qsl.net/k8dx</A></FONT></DIV></BODY>=
</HTML>
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