[Premium-Rx] Reaction Instruments 490_2 Multicoupler

[Terry O']

Where did you download this manual?  The links on the Premium RX website 
are dead.

Terry O'
http://watkins-johnson.terryo.org
 


GandalfG8 at aol.com wrote:
> 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