[GreenKeys] Need advice - 28 selector almost works OK

[Don Robert House K9TTY]

Jacks advice is gospel.

Our foreman gave us a time limit on getting problems with reperforators fixed.  After that time was used up we sent the units back to Western Electric for repair.
When we ordered replacements we seldom received the units we sent in… many of them were new from TTY Corp.
In one case, I will never forget, one of our guys put a linen tag (remember them) on a part that read "Follow this string to the trouble!"
Three days later we got the same unit back with the tag still attached.  The unit became a large paper weight in the shop that was always ripe for discussion.
The worst reperf ever was the TYPING reperforator  for the Model 37.  Eventually we gave up on them and replaced them with NON-TYPING reperforators.
They were difficult to repair as well but without the typing mechanism the trouble reports dropped significantly. 

The other day I drove by 78 E. Dundee Road, in Wheeling, IL where our shop and garage was.  Nothing there now except grass and a fence.
My initials are still in the power pole however when I was walking the picket line during the 1968 strike.

Don K9TTY


On 27 Feb 2015, at 2:16 PM, Jack wrote:

> Nick,
>  
> From another “retired” TTY repairman…
>  
> Watch the selector slides that are operated by the selector/cam.
> Are they following the correct data or are they also showing the
> errors that you see on the punched tape?
>  
> If you’re not getting good range, are you sure the machine is
> 7.42 versus 7.0?
>  
> LPR’s were a nightmare to work on. We usually just replaced them
> and sent them back to Western Electric for repair. They had dozens
> of little old ladies that worked on them.
>  
> Jack K0TTY
>  
> NNNN
>  
>  
> From: GreenKeys [mailto:greenkeys-bounces at mailman.qth.net] On Behalf Of Don Robert House K9TTY
> Sent: Friday, February 27, 2015 1:53 PM
> To: Nick England
> Cc: Greenkeys
> Subject: Re: [GreenKeys] Need advice - 28 selector almost works OK
>  
> Hi Nick,
>  
> The manual shows how to check the spring tension for the selector armature. Also the down-stop adjustment.
> As I have written many times.. the faster the data rate the more critical are the adjustments and lubrication.
> All of us that repaired these machines for the Bell System carried a small envelope with strips of high-grade bond paper.
> The strips were about 3/8" wide and about 3" long.  The paper was about 22-24 Pound stock.
> These strips are inserted between the selector magnet and the armature.  Hold the armature up and pull out the paper strip.
> Keep doing this until the strips come out clean "as a whistle" (whatever that means.)
> You need to make sure there is no oil or grease, or anything else in that important gap.
> If I find my package of strips I will post an image.
>  
> Memories,
>  
> Don
> K9TTY
>  
> P.S.  Let me know if you need a spring gauge.
>  
>  
> On 27 Feb 2015, at 9:32 AM, Nick England wrote:
> 
> 
> For my multiple reperf project I've been checking out several typing reperf units that I got from an estate.
> After cleaning, lubricating, replacing lost springs, etc. all except one seem to work fine at 100wpm
> One seems to have a selector problem but I'm inexperienced enough to wonder what to do next - I appreciate some advice from you guys who have serviced 100's of these things.
> 
> Symptoms - bit errors every now and then. When I test with reversals there is a very narrow range on the rangefinder where the tape looks OK almost all the time. Otherwise I get some holes always marking or always spacing.
>  
> I can't *see* anything like missing springs or bent levers or congealed crud in the innards - Adjusting the magnet armature spring doesn't seem to have much effect in increasing the rangefinder range. What else can I actually do in the selector? Is this the symptom of a worn cams or selector levers?
> 
> Sorry to be such a pest - I just need a retired TTY repairman to move in next door and then I'll be all set to learn something. Until then Greenkeys is my resource - many thanks for all the help and friendly advice.
> 
> Nick England K4NYW
> www.navy-radio.com
> ______________________________________________________________
> GreenKeys mailing list
> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:GreenKeys at mailman.qth.net
> 
> 2002-to-present greenkeys archive: http://mailman.qth.net/pipermail/greenkeys/
> 1998-to-2001 greenkeys archive: http://mailman.qth.net/archive/greenkeys/greenkeys.html
> Randy Guttery's 2001-to-2009 GreenKeys Search Tool: http://comcents.com/tty/greenkeyssearch.html
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>