UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Two DSL filters, two 706 phones, bell tinkle

AndiiT · 13th Jul 2019, 6:42 pm

Hi, from your post I guess that you are trying to eliminate Bell tinkle on your 706 phones when dialling on them.

In the past Bell tinkle was eliminated by the introduction of a third wire which with the advent of ADSL could cause problems with your broadband service additionally the need for an ADSL filter could complicate matters in the event of you wanting to use older style telephones which required a third wire for ringing; Most, if not all ADSL filters should contain a ringing capacitor to allow "three - wire" phones to be used although these may also cause bell tinkle when using older phones such as 706 types.

If you can obtain a couple of auxiliary gravity Switches 19B - 1, which occasionally crop up on eBay you could re - wire your 706's to "two - wire" working and connect the switches to mute the bell motor when the handset is lifted which should eliminate bell tinkle, this was done officially on some of the GPO's extension plan installations.

Regards

Andrew

13th Jul 2019, 6:42 pm	#2
AndiiT Octode Join Date: Aug 2005 Location: Saltburn-East, Cleveland, UK. Posts: 1,786	Re: Two DSL filters, two 706 phones, bell tinkle Hi, from your post I guess that you are trying to eliminate Bell tinkle on your 706 phones when dialling on them. In the past Bell tinkle was eliminated by the introduction of a third wire which with the advent of ADSL could cause problems with your broadband service additionally the need for an ADSL filter could complicate matters in the event of you wanting to use older style telephones which required a third wire for ringing; Most, if not all ADSL filters should contain a ringing capacitor to allow "three - wire" phones to be used although these may also cause bell tinkle when using older phones such as 706 types. If you can obtain a couple of auxiliary gravity Switches 19B - 1, which occasionally crop up on eBay you could re - wire your 706's to "two - wire" working and connect the switches to mute the bell motor when the handset is lifted which should eliminate bell tinkle, this was done officially on some of the GPO's extension plan installations. Regards Andrew