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Vintage Telephony and Telecomms Vintage Telephones, Telephony and Telecomms Equipment

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Old 2nd Jul 2020, 6:56 pm   #1
OscarFoxtrot
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Default Convertor ringing 2A

The square grey plastic box, item 375507, used to provide external bells on Norstar and some other systems.

I used to have, or could find online, information about the terminals, but I've lost it. Can anyone help?

Inputs PL1
AC IN
DC AUX
DC +
DC -
AC COM

(there are 4 connections for 5 designations - are DC- and AC COM the same?)

Output PL2
HIGH
N/C
LOW

Link to photo of the outside:
http://www.telephonesuk.co.uk/images...gen_2a_out.jpg
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Old 2nd Jul 2020, 7:58 pm   #2
AC/HL
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Default Re: Convertor ringing 2A

From an earlier thread: https://www.vintage-radio.net/forum/...14&postcount=7
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Old 2nd Jul 2020, 8:44 pm   #3
OscarFoxtrot
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Default Re: Convertor ringing 2A

"Ringing Generator" - that's why I couldn't find it. I did search, honestly! Slightly embarrassed

Thank you.
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Old 2nd Jul 2020, 9:10 pm   #4
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Old 3rd Jul 2020, 7:44 pm   #5
Oldcodger
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Default Re: Convertor ringing 2A

I've got one sitting on the bench- all the info is on the rear on a label. Ringing generator 2A
Item code 375507 , With a another number "GRS/90340004685" .
I used to remove them from old BT systems I replaced with Panasonics and kept them as often I'd be asked to fit an extension bell to something like a Norstar. Can't help on the battey supply as I had an old mate who used to help me out with wiring & programing. In return I could help him out with problems on Panasonic programming.
I also used to take out (smaller BT systems) a NTE sized socket with an invertor on the rear which runs on a 47v supply. It is polarity sensitive.
( Mentioned this one on here before , but nobody seemed to have seen one ,or knew the number/ N DIAGRAM ).
For info was in April this year .
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