[BC] 4X150D

[Dana Puopolo]

Their interelectrode capacitence is a bit different. I discovered this working
on a Harris 2.5 kW FM transmitter, the driver's tuning was really touchy and
unstable-until I discovered they had put a 4CX250B into the unit instead of a
4X150. Putting the proper tube in eliminated all instability.

-D

------ Original Message ------
Received: Fri, 23 Mar 2007 02:04:41 PM EDT
From: "Moore, Randy" <RandyMoore at clearchannel.com>
To: "Broadcasters' Mailing List" <broadcast at radiolists.net>
Subject: RE: [BC] 4X150D

Paul,

I think you can use the 4CX250 in the same socket as a replacement if
you cannot find any 150's.  There should be lots of those laying around
at site that have Gates 20H3 transmitters, and Harris FM20K's.

Randy Moore
AI4CO
 

-----Original Message-----
From: broadcast-bounces at radiolists.net
[mailto:broadcast-bounces at radiolists.net] On Behalf Of N0JAA at aol.com
Sent: Friday, March 23, 2007 1:49 PM
To: broadcast at radiolists.net
Subject: [BC] 4X150D

Does anyone know where I can find a couple of 4X150D tubes?  I just
received a military-surplus transmitter that I plan to modify for ham
radio use,  and it has all tubes except the 150's.
 
Thanks.
 
 
Paul Gray.
 
 
 



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