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Vintage Telephony and Telecomms Vintage Telephones, Telephony and Telecomms Equipment |
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16th Apr 2020, 3:44 pm | #1 |
Heptode
Join Date: Oct 2006
Location: Leeds, West Yorkshire, UK.
Posts: 593
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Dial-blank 706 telephone conversion
Hello. I've just bought this old 706 and I plan to convert it with a new line cord, resistor and so on. Before the kit arrives, is there anything obvious to an expert (but not me) that might need attention? Obviously, I'll give the inside a sweep and a vacuum and give the handset and case a good wash too. Incidentally, it's one of those upside-down phones for wall mounting.
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16th Apr 2020, 4:02 pm | #2 |
Hexode
Join Date: Nov 2013
Location: Lancing, West Sussex, UK.
Posts: 284
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Re: Dial-blank 706 telephone conversion
High this could be a 706CB for a originally for a Central Battery Manual Exchange. N Diagram N806 refers to it on the notes on page four. If you check how the straps are connected this will confirm if it is or if it has been set up as an incoming calls only extension on an Automatic Exchange.
Trevor. |
16th Apr 2020, 4:49 pm | #3 |
Heptode
Join Date: Oct 2006
Location: Leeds, West Yorkshire, UK.
Posts: 593
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Re: Dial-blank 706 telephone conversion
Thanks, Trevor, I'll have a look. It's a Reliance model from no earlier than 1964 (going by the earphone element) with the designation 'TEL17K/ATS' on the base.
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16th Apr 2020, 6:35 pm | #4 |
Hexode
Join Date: Nov 2013
Location: Lancing, West Sussex, UK.
Posts: 284
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Re: Dial-blank 706 telephone conversion
I have just sent you a PM.
Trevor. |
18th Apr 2020, 8:40 am | #5 |
Heptode
Join Date: Oct 2006
Location: Leeds, West Yorkshire, UK.
Posts: 593
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Re: Dial-blank 706 telephone conversion
The diagrams suggest this is likely to be a CB telephone although I think one strap might have been in a different place. I'm just waiting for the conversion kit to arrive and then we'll see what happens.
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18th Apr 2020, 7:01 pm | #6 |
Heptode
Join Date: Apr 2011
Location: Edinburgh, UK.
Posts: 805
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Re: Dial-blank 706 telephone conversion
On a CB telephone with no dial you will need to put a strap or two to replace the missing dial contacts.
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18th Apr 2020, 7:10 pm | #7 |
Dekatron
Join Date: Jun 2015
Location: Biggin Hill, London, UK.
Posts: 5,191
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Re: Dial-blank 706 telephone conversion
I believe that's done in Photo 2 (in the first post). The 3 wires stuck into holes in the plastic base are the ones that go to the normally-open 'off normal' contacts so are left unconnected in the CB version. The 2 wires under the screw (and thus shorted together) are the pair that go to the normally-closed impulse contacts.
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18th Apr 2020, 7:35 pm | #8 |
Heptode
Join Date: Oct 2006
Location: Leeds, West Yorkshire, UK.
Posts: 593
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Re: Dial-blank 706 telephone conversion
Thanks Oscar and Tony.
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18th Apr 2020, 7:38 pm | #9 | |
Heptode
Join Date: Jul 2007
Location: Flintshire, UK.
Posts: 707
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Re: Dial-blank 706 telephone conversion
Quote:
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18th Apr 2020, 10:27 pm | #10 |
Heptode
Join Date: Oct 2006
Location: Leeds, West Yorkshire, UK.
Posts: 593
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Re: Dial-blank 706 telephone conversion
Thankyou Pellseinydd.
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22nd Apr 2020, 12:48 pm | #11 |
Heptode
Join Date: Oct 2006
Location: Leeds, West Yorkshire, UK.
Posts: 593
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Re: Dial-blank 706 telephone conversion
Newly-restored and functional. Just need to decide which wall to hang it on.
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3rd May 2020, 4:37 pm | #12 |
Heptode
Join Date: Oct 2006
Location: Leeds, West Yorkshire, UK.
Posts: 593
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Re: Dial-blank 706 telephone conversion
The bell is still connected in this telephone but I would like to disconnect it. In the absence of a bell on/off switch, is there a recommended way to disable the bell, be it just disconnecting its wires and parking them on spare terminals or shorting the two terminals ?
Many thanks. |
3rd May 2020, 4:47 pm | #13 |
Dekatron
Join Date: Jun 2015
Location: Biggin Hill, London, UK.
Posts: 5,191
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Re: Dial-blank 706 telephone conversion
If you've converted it to the BT plug wiring system, then disabling the bell is simply a matter of disconnecting it. Removing the added 3k3 resistor will do that. So will moving one of the bell wires to a spare terminal.
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3rd May 2020, 5:20 pm | #14 |
Heptode
Join Date: Oct 2006
Location: Leeds, West Yorkshire, UK.
Posts: 593
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Re: Dial-blank 706 telephone conversion
Thanks Tony. I'm glad it's that simple.
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