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

[Chris Kepus]

Any chance you're going to post your notes on component evolution... final
results?  Sounds like that would be of wide benefit. :-)
73,
Chris
W7JPG

-----Original Message-----
From: collins-bounces at mailman.qth.net
[mailto:collins-bounces at mailman.qth.net] On Behalf Of Bob and Sue Jefferis
Sent: Wednesday, May 23, 2012 6:23 AM
To: geraldj at weather.net
Cc: collins at mailman.qth.net
Subject: Re: [Collins] 32S-3 driver and PA tube screen resistors

Thanks to everyone that responded. The squares are filled.

73, Bob, KF6BC
On May 22, 2012, at 9:04 PM, Dr. Gerald N. Johnson wrote:

> 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
>> 
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