746 Bell Wiring? - UK Vintage Radio Repair and Restoration Discussion Forum

Ryan_1993 · 14th Oct 2014, 5:16 pm

Hello,

a while back I disconnected the bell inside my 741 wall phone by removing a blue wire (going to the right hand side of the bell clapper) as I was just using my bell set number 26 for my phone collection. This has changed and now when I have tried connecting it onto T14 the bell won't ring. Any idea why?

Thanks

Ryan

Nickthedentist · 14th Oct 2014, 6:03 pm

Ryan,

Please post a good, close-up picture of your PCB and its wiring.

BTW, are you using a good quality microfilter, which will provide a ringing signal on the blue wire in the line cord?

N.

Ryan_1993 · 14th Oct 2014, 6:34 pm

I've never had an issue with it before. It was disconnected about two or three weeks back as I was using my bell set No 26 for the main bell. Now since I have my PBX I want to connect it back to it.

I don't have a micro filter since it is connected into my Panasonic branch exchange. I will post a photo later though

ThePillenwerfer · 14th Oct 2014, 6:38 pm

The bell coils should be between T4 and T16-19 (the four that are strapped together). You say you've connected it to T14 which is a spare.

- Joe

Ryan_1993 · 14th Oct 2014, 6:48 pm

I'm sure that's what It was connected to, since that is the only one on the PCB with a screw missing. I will have another look though.

Ryan

Nickthedentist · 14th Oct 2014, 6:57 pm

Joe's right of course!

T14 has nothing connected under the PCB - have a look if you don't believe us.

N.

Ryan_1993 · 15th Oct 2014, 3:35 pm

Joe was right ha ha, the screw must have dropped out. works fine mounted on T19.

14th Oct 2014, 5:16 pm	#1
Ryan_1993 Hexode Join Date: Sep 2012 Location: Yorkshire, UK. Posts: 329	746 Bell Wiring? Hello, a while back I disconnected the bell inside my 741 wall phone by removing a blue wire (going to the right hand side of the bell clapper) as I was just using my bell set number 26 for my phone collection. This has changed and now when I have tried connecting it onto T14 the bell won't ring. Any idea why? Thanks Ryan

14th Oct 2014, 6:03 pm	#2
Nickthedentist Dekatron Join Date: Jan 2005 Location: Oxford, UK. Posts: 17,865	Re: 746 Bell Wiring? Ryan, Please post a good, close-up picture of your PCB and its wiring. BTW, are you using a good quality microfilter, which will provide a ringing signal on the blue wire in the line cord? N.

14th Oct 2014, 6:34 pm	#3
Ryan_1993 Hexode Join Date: Sep 2012 Location: Yorkshire, UK. Posts: 329	Re: 746 Bell Wiring? I've never had an issue with it before. It was disconnected about two or three weeks back as I was using my bell set No 26 for the main bell. Now since I have my PBX I want to connect it back to it. I don't have a micro filter since it is connected into my Panasonic branch exchange. I will post a photo later though

14th Oct 2014, 6:38 pm	#4
ThePillenwerfer Octode Join Date: Mar 2011 Location: Sheffield, South Yorkshire, UK. Posts: 1,453	Re: 746 Bell Wiring? The bell coils should be between T4 and T16-19 (the four that are strapped together). You say you've connected it to T14 which is a spare. - Joe __________________ "Experts are only good at one thing: explaining why something will not work!"

14th Oct 2014, 6:48 pm	#5
Ryan_1993 Hexode Join Date: Sep 2012 Location: Yorkshire, UK. Posts: 329	Re: 746 Bell Wiring? I'm sure that's what It was connected to, since that is the only one on the PCB with a screw missing. I will have another look though. Ryan

14th Oct 2014, 6:57 pm	#6
Nickthedentist Dekatron Join Date: Jan 2005 Location: Oxford, UK. Posts: 17,865	Re: 746 Bell Wiring? Joe's right of course! T14 has nothing connected under the PCB - have a look if you don't believe us. N.

15th Oct 2014, 3:35 pm	#7
Ryan_1993 Hexode Join Date: Sep 2012 Location: Yorkshire, UK. Posts: 329	Re: 746 Bell Wiring? Joe was right ha ha, the screw must have dropped out. works fine mounted on T19.