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

dagskarlsen · 30th Nov 2020, 12:49 pm

When it comes to the dial, if you short the 2 normally closed contacts the possible error caused by the dial should be eliminated. All the other contacts should remain open in rest position. (Of course this is just for testing since you will not be able to dial)
The next may be the handset-cord may it be bad, and change resistance when it is moved?
My third idea is the plug in regulator, not sure but I believe this would be turned around and and plugged in to just bypass that function.

Regarding cleaning of contacts, I have been a bad boy and cleaned some when everything else failed by using a strip of sandpaper, that I got from a dentist.

30th Nov 2020, 12:49 pm	#20
dagskarlsen Heptode Join Date: Jan 2008 Location: Hakadal, Norway Posts: 643	Re: TMA 7214 Faint outgoing speech When it comes to the dial, if you short the 2 normally closed contacts the possible error caused by the dial should be eliminated. All the other contacts should remain open in rest position. (Of course this is just for testing since you will not be able to dial) The next may be the handset-cord may it be bad, and change resistance when it is moved? My third idea is the plug in regulator, not sure but I believe this would be turned around and and plugged in to just bypass that function. Regarding cleaning of contacts, I have been a bad boy and cleaned some when everything else failed by using a strip of sandpaper, that I got from a dentist.