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

Dave Moll · 17th Oct 2018, 7:58 am

If I undersand your description correctly, the problem is confined to the "Speak to extension" setting. If so, then it has to be that something (e.g. oxidation in a set of contacts) specific to the contacts in use in that position is attenuating the signal. Could you try working your way through that signal path (with the setup NOT powered up - either by line or local battery) measuring the resistance across various points, to localise the problem?

17th Oct 2018, 7:58 am	#2
Dave Moll Dekatron Join Date: Feb 2005 Location: West Cumbria (CA13), UK Posts: 6,130	Re: Plan 7 If I undersand your description correctly, the problem is confined to the "Speak to extension" setting. If so, then it has to be that something (e.g. oxidation in a set of contacts) specific to the contacts in use in that position is attenuating the signal. Could you try working your way through that signal path (with the setup NOT powered up - either by line or local battery) measuring the resistance across various points, to localise the problem? __________________ Mending is better than Ending (cf Brave New World by Aldous Huxley)