[Amps] 4CX1600B vs. GU84B

[W2fca at cs.com]

In a message dated 3/8/03 12:16:06 Greenwich Standard Time, 
jmaass at columbus.rr.com writes:

<< Are they pin compatible? Can the GU84B be used in a 4CX1600B 
 amp without (or with) modifications?
  >>
It sems to me the military analog is the gu91b, which I've seen listed as a 
4CX1600A. The anode is smaller, though. The 1600B is the size of an 8877, the 
1600A is the size of a 4CX800

Frank
W2FCA