312L telephone without Bells - but something else in its place - UK Vintage Radio Repair and Restoration Discussion Forum

Joe Shmoe · 21st Jan 2017, 6:53 pm

I acquired my granddads old 312L and the dial wasn't turning. I decided to fix it just out of interest using an online guide. Glad to say that's done, but while I had the phone open, I noted it didn't have the two bells that other photos on the Internet have.... And instead there is a something else. Can anyone point me in the right direction as im quite interested in it now.

Thanks.

AC/HL · 21st Jan 2017, 8:57 pm

That looks like the remnants of an old doorbell. I wouldn't think that it will work as a telephone bell. Was the phone used as an intercom perhaps?

AndiiT · 21st Jan 2017, 10:39 pm

Hi,
Your 312 may possibly have been the 'B' end of a Plan 7 installation where a buzzer may have been fitted in place of the trembler bell shown in the facility diagram.

Regards

Andrew

els1967 · 23rd Jan 2017, 12:06 pm

If it was part of a planset then the trembler bell would have been operated via a button switch on the remote phone via a small DC supply from batteries. Unfortunately this means you won't be able to get this phone ringing on a regular phone line unless you put in a magneto bell set. Also, it looks like the actual bell has gone missing from yours.

Pellseinydd · 23rd Jan 2017, 12:47 pm

Quote:

Originally Posted by AndiiT

Your 312 may possibly have been the 'B' end of a Plan 7 installation where a buzzer may have been fitted in place of the trembler bell shown in the facility diagram.

Definitely not a 'GPO' mod. With the Plan 7, the trembler bell was an externally fitted 'Bell 56D' - the internal magneto bell was required for incoming exchange line calls when switched through. See page 5 of http://www.samhallas.co.uk/repositor...3000/N3928.pdf

Wo betide you if you did anything that wasn't to the 'N' diagram in GPO days. Plus the buzzer is not a GPO one and no GPO engineer would leave anything in that state anyway. To my mind a 'bodge' after it got into other hands.

Ian

21st Jan 2017, 6:53 pm	#1
Joe Shmoe Retired Dormant Member Join Date: Jan 2017 Location: Chelmsford, Essex, UK. Posts: 3	312L telephone without Bells - but something else in its place I acquired my granddads old 312L and the dial wasn't turning. I decided to fix it just out of interest using an online guide. Glad to say that's done, but while I had the phone open, I noted it didn't have the two bells that other photos on the Internet have.... And instead there is a something else. Can anyone point me in the right direction as im quite interested in it now. Thanks. Attached Thumbnails

21st Jan 2017, 8:57 pm	#2
AC/HL Dekatron Join Date: Nov 2003 Location: Heckmondwike, West Yorkshire, UK. Posts: 9,642	Re: 312L telephone without Bells - but something else in its place That looks like the remnants of an old doorbell. I wouldn't think that it will work as a telephone bell. Was the phone used as an intercom perhaps?

21st Jan 2017, 10:39 pm	#3
AndiiT Octode Join Date: Aug 2005 Location: Saltburn-East, Cleveland, UK. Posts: 1,786	Re: 312L telephone without Bells - but something else in its place Hi, Your 312 may possibly have been the 'B' end of a Plan 7 installation where a buzzer may have been fitted in place of the trembler bell shown in the facility diagram. Regards Andrew

23rd Jan 2017, 12:06 pm	#4
els1967 Pentode Join Date: Aug 2016 Location: Dunstable, Bedfordshire, UK. Posts: 140	Re: 312L telephone without Bells - but something else in its place If it was part of a planset then the trembler bell would have been operated via a button switch on the remote phone via a small DC supply from batteries. Unfortunately this means you won't be able to get this phone ringing on a regular phone line unless you put in a magneto bell set. Also, it looks like the actual bell has gone missing from yours.