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Vintage Telephony and Telecomms Vintage Telephones, Telephony and Telecomms Equipment |
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21st Jul 2020, 10:47 am | #1 |
Diode
Join Date: Jul 2020
Location: Woodford Green, London, UK.
Posts: 3
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Odd 706
Hi, I have a 706 telephone that seems to be non-standard.
I had two of these phones that I got from the same person. I tried converting them, one worked, the other didn't. The incoming line went off for a short time, so I assumed there was a short and I started to look for faults and tracing the internal wiring. It seems to be an early version of the 706 without a PCB. I noticed two odd things. 1) The Automatic Sensitivity Regulator is missing and only the terminals A, C & E are fitted. The 706 phone should work with the regulators reversed, which would connect terminals B, C and D, but since B and D are missing, this won’t do anything. 2) The Induction coil No. 31 is missing and doesn't seem to have ever been installed. Maybe someone has removed it. There is a wiring schematic N112419/4 pasted inside the cover of the phone which doesn't show the induction coil or the regulator, so I don't think it has been altered. It differs from the wiring shown on standard N806 diagram. Can anyone tell me what this phone might be and if could be converted? I suspect it may have been a special for an extension, which won't work on its own. Thanks for any help. |
21st Jul 2020, 11:03 am | #2 |
Dekatron
Join Date: Feb 2005
Location: West Cumbria (CA13), UK
Posts: 6,130
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Re: Odd 706
See https://www.britishtelephones.com/ericsson/n1900.htm for more information about this model of telephone.
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Mending is better than Ending (cf Brave New World by Aldous Huxley) |
21st Jul 2020, 11:05 am | #3 |
Dekatron
Join Date: Jan 2005
Location: Oxford, UK.
Posts: 17,864
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Re: Odd 706
Yes, it's basically a cost-reduced Ericsson phone designed for use as an extension on a private exchange like you might find in a big office or factory etc.
It will work on a normal BT line. Nick. |
21st Jul 2020, 11:12 am | #4 | |
Diode
Join Date: Jul 2020
Location: Woodford Green, London, UK.
Posts: 3
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Re: Odd 706
Quote:
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21st Jul 2020, 11:13 am | #5 |
Dekatron
Join Date: Feb 2005
Location: West Cumbria (CA13), UK
Posts: 6,130
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Re: Odd 706
Perhaps an image of how yours is wired might give a clue regarding why it isn't working.
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Mending is better than Ending (cf Brave New World by Aldous Huxley) |
21st Jul 2020, 1:18 pm | #6 |
Diode
Join Date: Jul 2020
Location: Woodford Green, London, UK.
Posts: 3
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Re: Odd 706
Thanks, I'll have another look at it this evening and will take some pictures tomorrow.
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