[R-1051] R-1051 variant summary

[Tony Snider]

what ever you guys do, DO NOT grease the rubber chains in the R-1051 F/G/H 
and the later T-827 series exciters they will turn to goop and leave you 
with 2 nice stainless steel cables






----- Original Message ----- 
From: <bonddaleena at aol.com>
To: <r390a at verizon.net>; <r-1051 at mailman.qth.net>
Sent: Wednesday, February 04, 2009 10:02 PM
Subject: Re: [R-1051] R-1051 variant summary


> 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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