[Collins] 32S-3 driver and PA tube screen resistors

[Dr. Gerald N. Johnson]

2nde ed Rockwell 32S-3A dated 1 Dec 1975 has 12K 1 watt carbon comp for 
R41. Shows R113 as 1.75K 3 watt wire wound.

7th ed 32S-3 manual dated 1 May, 1969, shows R113 as 1.75K 3 watt, R41 
as 22k 2 watt carbon comp.

My 32S-1 manual 7th ed June 1960 shows R113 as 2.5K 7 W, wire wound. 
Shows R41 as 22K 2 watt carbon comp.

32S-1 10th ed dated 15, Nov 1961 (but with Rockwell ID), shows R41 as 
22K 2 watt carbon comp and R113 as 1200 ohm 2 watt carbon comp.

Sure wish we had access to the MCN for these rigs, then we could trace 
the history of circuit mods easily.

73, Jerry, K0CQ, Technical Adviser to the Collins Radio Association.

On 5/22/2012 7:50 PM, Bob and Sue Jefferis wrote:
> Greetings,
>
> I am just trying to fill a couple more squares in my notes on
> component evolution. All of the 32S-3 manuals call for  R41 at V7
> pins 8 and 3 to be 22k Ohms, 2 Watt. I am wondering if the 1973 or
> 1975 32S-3A manuals show that it was changed to 12k Ohm, one or two
> Watt?
>
> Similarly, all of the 32S-3 manuals call for R113 feeding the PA
> screens to be 1750 Ohm, 3 Watt. Do the later 32S-3 manuals show that
> it might have been changed back to 1200 Ohms as it was in the 32S-1?
>
> Thanks for any information on this question.
>
> 73, Bob, KF6BC
>