[R-390] none genuine without these numbers...

[eldim@att.net]

I was wondering what the 66J number was stamped into the top of the tube shield!
Now we know the rest of the story.

73,
Glen KA7BOJ
Tacoma, WA
> 390folks -
> 
>   This reflector has been entirely too quiet lately.  Against Hank's
> advice, I will now try to separate the flys??t from the pepper.
> 
>   The 1960 Collins General Catalog states, on page 82, under the
> category "TUBE SHIELDS", "Collins 66J Heat Reducing Tube Shields can
> lower bulb hot spot temperature rise above ambient to as low as 55% of
> former values".
> 
>   The catalog further lists:
> 
> *******
> Collins Shield     Equivalent     Height     Tube
> Type Number           JAN           of       Size
> (includes          Shield No.     Shield
>  shield, corru-
>  gated liner &
>  base liner)
> 
>   66J-1            TS-102U01       1 3/8   7 pin short
>   66J-2            TS-102U02       1 3/4   7 pin medium
>   66J-3            TS-102U03       2 1/4   7 pin large
>   66J-4            TS-103U01       1 1/2   9 pin short
>   66J-5            TS-103U02      1 15/16  9 pin medium
>   66J-6            TS-103U03       2 3/8   9 pin large
> *******
> 
>   Anyone seen any tubeshields with this "66J-?" designation?  No doubt
> now worth millions on egad...
> 
> Dave Ross    N7EPI
> _______________________________________________
> R-390 mailing list
> R-390@mailman.qth.net
> http://mailman.qth.net/mailman/listinfo/r-390