UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Problem with dial 24c dial making clicking noises on 232 telephone

TonyDuell · 28th Aug 2020, 5:46 pm

I am not sure what the Dial 24C is, but I am assuming it's the same electrically as the dial normally used in the Telephone 232.

In which case try cleaning the off-normal contacts (the ones that close when the dial turned from the rest position). One pair of contacts short-circuits the receive to prevent said clicks.

DO NOT use abrasive, you will ruin the contacts. I normally cut a thin strip of paper, soak it in isopropyl alcohol (propan-2-ol), put it in the gap between the contacts, turn the dial so the contacts close, and pull the paper out. There's then a dark streak on the paper...

Repeat a few times and see if things improve.

28th Aug 2020, 5:46 pm	#4
TonyDuell Dekatron Join Date: Jun 2015 Location: Biggin Hill, London, UK. Posts: 5,209	Re: Problem with dial 24c dial making clicking noises on 232 telephone I am not sure what the Dial 24C is, but I am assuming it's the same electrically as the dial normally used in the Telephone 232. In which case try cleaning the off-normal contacts (the ones that close when the dial turned from the rest position). One pair of contacts short-circuits the receive to prevent said clicks. DO NOT use abrasive, you will ruin the contacts. I normally cut a thin strip of paper, soak it in isopropyl alcohol (propan-2-ol), put it in the gap between the contacts, turn the dial so the contacts close, and pull the paper out. There's then a dark streak on the paper... Repeat a few times and see if things improve.