[VoIP] Strowger 2000-type Final Selector

Tue Dec 18 14:35:40 CST 2007

To save any arguements!  I've emailled copies of 200 O/L Final Selector 
circuit diagrams, physical layout of 'U' points and several pages from 
Atkinson's Vol 2 showing the details that Mark wants direct to him.

Ian J.

----- Original Message ----- 
From: "windmill" <windmill at topletter.com>
To: "Voice Over IP Tandem for Analog Switches" <voip at ckts.info>
Sent: Tuesday, December 18, 2007 3:47 PM
Subject: Re: [VoIP] Strowger 2000-type Final Selector

> No!
>
> Back the right odds!
>
> Counting from the white line at the centre to the left it's 2, 4 ,6 etc
> to 32 and to the right 1,3,5 etc to 31.
>
> Brian
>
> Andy Greening wrote:
>> At the back of the switch you will find a connector (a set of what look 
>> like
>> teeth for want of a better description!) This is called the 'u' points.
>>
>> There is a white line between the middle ones. If you count from that 
>> line
>> outwards to the right (this is the even connectors (I Think!!!)) they go 
>> 2,
>> 4, 6, 8,10 etc.  contact 12 is Battery (ie -50 v dc) Note that each 'pin' 
>> is
>> two contacts, there is a small insulating piece between them, so contact 
>> 12
>> is the outer contact on the third pin.
>>
>> Counting the other way from the line you go 1, 3, 5, 7, etc and contact 
>> 11
>> is earth (ie 0 v dc).
>>
>> Incoming line is on 1 and 2, p wire is on 9. So looping 1 and 2 out to a
>> loop dialling jellybone will allow you to dial into it.
>>
>>
>> Hopefully this will help?
>>
>> Andy G
>>
>> -----Original Message-----
>> From: voip-bounces at ckts.info [mailto:voip-bounces at ckts.info] On Behalf Of
>> Mad Mark
>> Sent: 18 December 2007 13:34
>> To: VOIP
>> Subject: Re: [VoIP] Strowger 2000-type Final Selector
>>
>>
>>
>>
>> With many many thanks to Jon for pointing me in the right direction, I
>> have obtained the maintenance documentation for a switch *very* similar
>> to mine. There are only a few differences, making me think it's a
>> slightly different model, but there was more than enough information to
>> get the switch fixed and adjusted into a workable condition. It now
>> steps horizontally and vertically with no trouble at all, and returns
>> to the home position flawlessly.
>>
>>
>>
>> The only thing now is to make sure the electrical side of things work
>> properly. As I don't have a 48.6V supply at the moment, I can't do any
>> testing as yet... Not that I could without knowing where the power needs 
>> to
>> go. Tracing the wires is out of the question, as any color the wires may
>> have had has since faded into obscurity. Still looking for a schematic of
>> the switch, or at least a pinout so I know what connections on the back 
>> and
>> front are used for what.
>>
>> There are 2 wire jumpers on the front test panel, a red and green one. I
>> don't know what these are for - perhaps used to take the switch out of
>> service?
>>
>>
>>
>>
>>> Date: Mon, 17 Dec 2007 12:52:33 +0000
>>> From: g4vft at btinternet.com
>>> To: voip at ckts.info
>>> Subject: Re: [VoIP] Strowger 2000-type Final Selector
>>>
>>>
>>> Mark,
>>> For the mechanical adjustments, take a look at Andy Greening's site,
>>> www.uax.me.uk
>>> Go to Misc EI's and download B5156.
>>> As for the diagram, you need to tell us the "AT" number of the selector,
>>> usually on a paper label, somewhere around the casting.
>>>
>>>
>>> Jon
>>>
>>> Mad Mark wrote:
>>>
>>>> So, I picked up the selector today. The first piece of my collection.
>>>>
>> It's a beauty!
>>
>>>> However, there is a little fault on the switch. Theres a little 
>>>> armature
>>>>
>> that pushes the selector rod around to swing the contacts. This little 
>> arm
>> is stuck in a raised position as the hinge is a little stiff and won't 
>> let
>> it drop back down to push the next ratchet tooth. Has anyone repaired one 
>> of
>> these beautiful devices before? Can you give me some tips or pointers as 
>> to
>> how I might go about repairing this little part?
>>
>>>> Also, I'm wondering if anyone has a scan of the schematic diagram of
>>>>
>> this selector. From Mr. Buckley I've learned many things about this 
>> switch,
>> but sadly, my knowledge is still a little incomplete.
>>
>>>> Thanks heaps.
>>>>
>>>> _________________________________________________________________
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>>>>
>>>>
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