UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

TonyDuell · 3rd Jun 2019, 4:46 pm

My first thought (without really working through the circuits) is the 'earth' connections. Each extension needs to be earthed, so does the planset _and it depends on the 'a' wire of the telephone line being earthed at the exchange_.

You can simply link the earths together, and back to the A wire (using 3 core cable to the extensions) rather than using true earth (which may cause problems if your telephone line is wired the other way round).

3rd Jun 2019, 4:46 pm	#2
TonyDuell Dekatron Join Date: Jun 2015 Location: Biggin Hill, London, UK. Posts: 5,215	Re: Gpo planset with external extensions My first thought (without really working through the circuits) is the 'earth' connections. Each extension needs to be earthed, so does the planset _and it depends on the 'a' wire of the telephone line being earthed at the exchange_. You can simply link the earths together, and back to the A wire (using 3 core cable to the extensions) rather than using true earth (which may cause problems if your telephone line is wired the other way round).