Thanks to all who replied to my inquiry!
Bottom line is that the 4CX1600B and GU84B are *not* pin compatible.
Sockets are different, more cooling is required for the GU84B, different
filament requirements.
There are some sites turned up by Google that suggest that they are
the same (or at least are compatible): beware!
One source says that Svetlana is (or has) re-started production of the
4CX1600B. Don't know if/when the supply might increase or the
price drop.
And, finally, I was asked if we'd had a 4CX1600B fail, sending me on
my search. The answer is "no": we are just interested in acquiring
a spare to store on-site in Curacao. The Ten Tec Titan II keeps
chugging along well!
Thanks again for the replies!
73,
Jeff Maass jmaass@columbus.rr.com Located near Columbus Ohio
USPSA # L-1192 NROI/CRO Amateur Radio K8ND
Maass' IPSC Resources: http://home.columbus.rr.com/jmaass/index.html
Circleville USPSA/IPSC: http://home.columbus.rr.com/jmaass/pcsiipsc.htm
> -----Original Message-----
> From: Jeff Maass [mailto:jmaass@columbus.rr.com]
> Sent: Saturday, March 08, 2003 07:13
> To: Amps Mailing List
> Subject: 4CX1600B vs. GU84B
>
>
>
> My club has, courtesy of Ten Tec, a Ten Tec Titan II, which uses
> the Svetlana 4CX1600B. This tube has become expensive and
> scarce, and we are looking for an affordable spare 4CX1600B, or
> an affordable alternative.
>
> I've seen some references that identify the Svetlana GU84B as
> being the military analog, with a bit more dissipation rating, but
> needing more cooling air.
>
> Are they pin compatible? Can the GU84B be used in a 4CX1600B
> amp without (or with) modifications?
>
> Anyone have a 4CX1600B at a reasonable price, or know of one?
>
> Jeff Maass jmaass@columbus.rr.com Located near Columbus Ohio
> USPSA # L-1192 NROI/CRO Amateur Radio K8ND
> Maass' IPSC Resources: http://home.columbus.rr.com/jmaass/index.html
> Circleville USPSA/IPSC: http://home.columbus.rr.com/jmaass/pcsiipsc.htm
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