UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Roberts RT7

Darren-UK · 19th Apr 2009, 9:44 am

This is probably a wild goose chase, but the RT7 was designed to use the now-obsolete PP10 battery. Derek's example will, presumably, have been modified to use a PP9 or whatever. If the modification included replacing battery leads as well as the connector, it may be worth checking the soldered joints both ends thereof (as Steve suggests above) and also for any heat damage at the chassis end of the leads.

Long shot, but check polarity is correct too - it's not unknown for people to modify radios to accept a different battery, only to incorrectly polarise it.

Very obviously, check the battery isn't duff too. The Forums have had repair threads in the past where the 'fault' has eventually turned out to be a knackered battery. Don't rely on an off load reading, test it on load too.

19th Apr 2009, 9:44 am	#3
Darren-UK Retired Dormant Member Join Date: Apr 2003 Location: Blackpool, Lancashire, UK. Posts: 4,061	Re: Roberts RT7 - problem This is probably a wild goose chase, but the RT7 was designed to use the now-obsolete PP10 battery. Derek's example will, presumably, have been modified to use a PP9 or whatever. If the modification included replacing battery leads as well as the connector, it may be worth checking the soldered joints both ends thereof (as Steve suggests above) and also for any heat damage at the chassis end of the leads. Long shot, but check polarity is correct too - it's not unknown for people to modify radios to accept a different battery, only to incorrectly polarise it. Very obviously, check the battery isn't duff too. The Forums have had repair threads in the past where the 'fault' has eventually turned out to be a knackered battery. Don't rely on an off load reading, test it on load too.