|
Vintage Telephony and Telecomms Vintage Telephones, Telephony and Telecomms Equipment |
|
Thread Tools |
20th Jul 2018, 12:18 pm | #1 |
Retired Dormant Member
Join Date: Jul 2018
Location: Gloucestershire, UK.
Posts: 5
|
Reliance telephone Co. Wall phone
Hi,
Just acquired a Reliance Telephone Company/GEC wall mounted phone. I am keen to convert it for use. It looks like the GPO 741 wall phone. Inside it looks more sophisticated. Would conversion be straightforward or is there more to it? Any advice, hints etc. gratefully received Thanks |
20th Jul 2018, 12:29 pm | #2 |
Dekatron
Join Date: Jun 2015
Location: Biggin Hill, London, UK.
Posts: 5,215
|
Re: Reliance telephone Co. Wall phone
It looks more like a GPO Telephone 711 to me (essentially a wall mounting 706, the 741 being the wall mounting 746). Try looking diagram N811 and seeing if it matches your telephone.
The only oddity that I've spotted is the component at the left end of the terminal block area. What is it connected to? |
20th Jul 2018, 12:57 pm | #3 |
Retired Dormant Member
Join Date: Jul 2018
Location: Gloucestershire, UK.
Posts: 5
|
Re: Reliance telephone Co. Wall phone
Thanks I will look into that, The component on the left of the terminals connects T1 and T10
|
20th Jul 2018, 1:14 pm | #4 |
Heptode
Join Date: Apr 2011
Location: Edinburgh, UK.
Posts: 805
|
Re: Reliance telephone Co. Wall phone
http://www.britishtelephones.com/gec/tel2k.htm
"The 150R resistor may be connected between T1 and T10 to reduce sidetone on short lines" |
20th Jul 2018, 6:36 pm | #5 |
Retired Dormant Member
Join Date: Jul 2018
Location: Gloucestershire, UK.
Posts: 5
|
Re: Reliance telephone Co. Wall phone
I have changed all the connections for conversion and added the 3.3 resistor. Not the 205 rectifier which I don't yet have. The phone dials in and out OK , but the sound and dial tone are so quiet as to be almost inaudible. What might cause this?
|
20th Jul 2018, 7:22 pm | #6 |
Heptode
Join Date: Jul 2007
Location: Flintshire, UK.
Posts: 707
|
Re: Reliance telephone Co. Wall phone
Have you removed the 150 ohm resistor between T1 and T10 (as mentioned in previous message) - there to reduce incoming speech levels when necessary?
|
21st Jul 2018, 6:07 pm | #7 |
Retired Dormant Member
Join Date: Jul 2018
Location: Gloucestershire, UK.
Posts: 5
|
Re: Reliance telephone Co. Wall phone
I removed the 150 resistor between T1 and T10. Made a phone call successfully, but the dial tone and sound reception were still as quiet. Although the person I called reported an increase in volume although sounding more crackly than before. So I still have the low volume issue. I might try another handset with the phone to eliminate that possibility
|
21st Jul 2018, 8:41 pm | #8 |
Octode
Join Date: Mar 2011
Location: Sheffield, South Yorkshire, UK.
Posts: 1,453
|
Re: Reliance telephone Co. Wall phone
Low volume and crackles could well be a failing transmitter or dirty dial contacts.
|
23rd Jul 2018, 6:05 pm | #9 |
Retired Dormant Member
Join Date: Jul 2018
Location: Gloucestershire, UK.
Posts: 5
|
Re: Reliance telephone Co. Wall phone
Changing the handset, now the phone works fine, except when dialling I can hear my breath in the earpiece, although once connected, it doesn't seem noticeable
|