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Biggles · 19th Jun 2017, 5:55 pm

I have been given a faulty R707 to look at by a friend but unfortunately someone has been at it and removed the battery connectors, directly wiring a PSU in their place. I was just wondering what the original battery arrangements were and what the supply voltage should be. The owner says it worked for a short while before going off, after the PSU was fitted by a technical person in a shop. It has Mullard modules inside so I suspect it will have the usual faults associated with those. Any advice welcome. Roberts radios aren't really my strong point.
Alan.

19th Jun 2017, 5:55 pm	#1
Biggles Rest in Peace Join Date: Feb 2004 Location: Hexham, Northumberland, UK. Posts: 2,234	Roberts R707 batteries I have been given a faulty R707 to look at by a friend but unfortunately someone has been at it and removed the battery connectors, directly wiring a PSU in their place. I was just wondering what the original battery arrangements were and what the supply voltage should be. The owner says it worked for a short while before going off, after the PSU was fitted by a technical person in a shop. It has Mullard modules inside so I suspect it will have the usual faults associated with those. Any advice welcome. Roberts radios aren't really my strong point. Alan.