Date: Fri, 17 Oct 2014 11:02:25 -0500
From: donroden@hiwaay.net
To: amps@contesting.com
Subject: [Amps] 3CX3000s
> Why one 3CX3000A7 amp?
>
> why not? If the 3CX-3000F7 is used, then NO socket is required.
What do you use for a quiet fan for a 3CX3 Amp ?
Don W4DNR
## I use a pair of Dayton 4C006B blowers on my 3x3 amp.
For full bore use, the tube requires 67 cfm at 1.2 inchs of pressure
and 104 deg F intake air. The 4C006B is good for 42 cfm at
1.2 inchs pressure. Hence 2 of em used. They are noisy though.
So the rf deck sits in the workshop.
## The rotron CX-33.. will also work good. A small variac works great
on these blowers. Temp in shop at night is like 64 deg F. You can turn the
variac way down for ssb + cw use. Between a more normal 60-70 F intake
air and ssb + cw use, you don’t require anywhere near 67 cfm.
Jim VE7RF
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