[R-1051] R-1051 variant summary

[bonddaleena at aol.com]

Quick comment about the chains.
Back in the 70's, I was a Customer Engineer for IBM. One of the 
products I serviced, was the IBM Series 3 Copier. The Collator (an 
option) had the same pitch plastic chain. I can only describe those 
chains as a HUGE POS!!! They broke constantly! To make matters worse, 
the chain was about 5 feet long and wound around a mess of gears. In a 
(losing) effort to reduce chain breakage, IBM Boulder, Co. where the 
machine was designed, recommended we (field grunts) smear this chain 
 from end to end with a Moly grease that IBM supplied us. Well, anyone 
who messes with Moly knows only TOO well, what it does to everything 
around it, including the serviceman!
Finally, a fellow Customer Engineer put in a suggestion to go to the 
metal chain. He got $100,000 for his 'idea'. I had the same idea about 
6 months before him. I never turned it in, because I "ASSUMED" the 
Engineers knew what they were doing! Groannnnnn. I made myself a 
bracelet out of that metal chain material and wore it for MANY years as 
a 'reminder'.
Why did the Engineers use plastic to start with? Noise. The metal chain 
was louder, and they were certain customers would complain.
Hell, they did complain when the plastic chain poked it ugly, nasty, 
head out the back of the machine every week!!!!

73
ron
N4UE


-----Original Message-----
From: Dennis Gibbs <r390a at verizon.net>
To: r-1051 at mailman.qth.net
Sent:20Wed, 4 Feb 2009 6:30 pm
Subject: Re: [R-1051] R-1051 variant summary




Nick,

 

Many thanks for these photos and all the information!

 

Over a year ago, I purchased an R-1051G from Ebay.  When I received it, 
I thought that perhaps some of the modules had been swapped out with 
those from an earlier version.

 

For some reason, I thought the later variants, the ‘G’ and ‘H’ models, 
had eliminated the two tubes in the front end.  According to your list, 
this appears NOT to be the case, as my ‘G’ model does have the two 
tubes.  I did check the six-pack module – After removing the lid, it 
contained the circuit boards mounted, similar to the ones in the 
pictures on your website.  The date codes on a couple of the ICs was 
the year 1979, which matches the contract date on the tag on the front 
panel.

 

My R-1051G has a mended metal chain – obviously repaired, but it 
appears to be a pretty good repair.  This is probably a desirable 
upgrade.  I wonder if the only change in this area was the move to a 
plastic chain – if they cheapened any of the pulleys/sprokets the chain 
rides on, perhaps the metal replacement may not be such a good idea.

 

Anyway, mine works well, and thanks to your information, it appears I 
have a mostly original R-1051G.
0A
 

Dennis




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