[Premium-Rx] Reaction Instruments 490_2 Multicoupler

[GandalfG8 at aol.com]

Some time ago I downloaded the manual for the Reaction Instruments 490-2  
multicoupler from the list reference section and given the very good  
specified LF response am considering building something for my own use  based on 
this design.
 
However, I've not been able to find any reference in the  manual to the 
part number of the NPN transistors used in the emitter  follower output stages.
It does comment that they have very high gain-bandwidth products but  
doesn't indicate whether this was due to special selection or just  because that 
was normal for the device used.
 
>From the drawings they look to be in a TO5 or TO39 package so  there's a 
few usual suspects I could try but if anyone could tell me what  actual 
devices were used that would be appreciated.
 
BTW
I've noticed that the links for the 490-2 manual, plus some of  the others, 
don't seem to be working at the moment.
 
regards
 
Nigel
GM8PZR