UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Decca Bradford 2230

Mick Mearman · 16th Sep 2006, 9:07 pm

If it's green with flyback lines could be the green output transistor o/c; pull the green output lead off, does the green go?
Can you see any other colours now? If so swap the green and red over: has it gone peak red now?
If so check the output transistor these can also go dry. Also if it's not that pull the aerial out and compare A1 and cathode voltages on all 3 guns; these should be similar. If not that's where the problem lies, also check the spark gaps for S/C

Hope this helps

16th Sep 2006, 9:07 pm	#8
Mick Mearman Retired Dormant Member Join Date: Feb 2005 Location: Kingswinford, West Midlands Posts: 0	Re: decca bradford If it's green with flyback lines could be the green output transistor o/c; pull the green output lead off, does the green go? Can you see any other colours now? If so swap the green and red over: has it gone peak red now? If so check the output transistor these can also go dry. Also if it's not that pull the aerial out and compare A1 and cathode voltages on all 3 guns; these should be similar. If not that's where the problem lies, also check the spark gaps for S/C Hope this helps