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

TonyDuell · 21st Jun 2017, 9:03 pm

For the lamp limiter to glow at all it must be passing current. With S3 (I assume that's the on/off switch) open, the current can't be flowing back down the neutral wire. So check that S3 really is opening.

Otherwise, that current must be flowing through something else. If the lamp limiter is in series with the upper wire on the circuit posted a few message back, that is, not the wire going through S3 to chassis, then a leak to earth at some point could do it.

21st Jun 2017, 9:03 pm	#150
TonyDuell Dekatron Join Date: Jun 2015 Location: Biggin Hill, London, UK. Posts: 5,208	Re: Bush A.C.91 For the lamp limiter to glow at all it must be passing current. With S3 (I assume that's the on/off switch) open, the current can't be flowing back down the neutral wire. So check that S3 really is opening. Otherwise, that current must be flowing through something else. If the lamp limiter is in series with the upper wire on the circuit posted a few message back, that is, not the wire going through S3 to chassis, then a leak to earth at some point could do it.