[QuadList] TR-600 Headwheel amp transistors-retrofit? (Need Service Bulletin)

[Ted Langdell]

On Sep 10, 2009, at 1:08 PM, Steve Greene wrote:
> Re the TR-600, be careful with the headwheel power amps (three  
> identical boards).  Each one used two big Motorola power transistors  
> that are almost impossible to find.  They would commonly blow on a  
> power surge.  I think RCA had a late technical bulletin on how to  
> retrofit those boards for commonly available transistors, but I  
> never found that particular bulletin again.
>
> Steve
> Steve Greene



Perhaps our long-time RCA Service man Gary Adams may have what's  
needed in his collection.  He's at IBC in the daVinci booth now, but  
might be able to chime in from Amsterdam.

Also, folks could compare TR-600 boards and see if there are  
differences using commonly available transistors.

Ted

Ted Langdell
Secretary
Skype: 	TedLangdell
e-mail:	ted at quadvideotapegroup.com

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