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[Amps] 3CX3000s

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Subject: [Amps] 3CX3000s
From: "Jim Thomson" <>
Date: Sat, 18 Oct 2014 04:48:15 -0700
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Date: Fri, 17 Oct 2014 11:02:25 -0500
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 ?


##  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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