[QuadList] TO-4s in TR-70s

[WVGO]

Hi Chris....
I've never seen, in person,  a TR-70 with a TO-4 installed.  I worked 
with plenty of them in TR-4s, 22s and 50s though, and I concur.....not 
that great.  
I might have seen some early RCA photos that showed one in a 70.  Maybe 
some very early production 70s received them.  I have two TR-70As and 
they both have 529s in them.  Perhaps RCA offered a retrofit kit to 
incorporate the 529, as the bridge front panel is entirely different 
over what would be required for a TO-4.   The ones in the picture appear 
to be A's to me, as they do not have the "notched" end panels, and 
appear to have the silver metal front panels on the bridges, compared to 
the painted RCA blue panels on Bs and Cs....a little hard to tell from 
that photo though.
Guy

>
> Subject:
> Re: [QuadList] History - what is the REAL story
> From:
> chill315 at aol.com
> Date:
> Sun, 17 May 2009 13:39:06 -0400
> To:
> quadlist at quadvideotapegroup.com
>
> To:
> quadlist at quadvideotapegroup.com
>
>
> The TR-70s in the photos are the B versions.  The way to tell is that 
> they have the Tektronix 529 as the scope.  The A version had the RCA 
> TO-4.  A scope that in my opinion was not that great.
>
> Chris Hill
>