UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Are there any Ex GPO engineers here? Dorman Lamps

Refugee · 21st Feb 2019, 4:38 pm

Those NPN/PNP flashers had one timing capacitor and relied on the flash of light from the bulb on the LDR or photo diode for the other part of the timing.
I have got a tatty one of the later yellow paraffin lamps.

21st Feb 2019, 4:38 pm	#11
Refugee Dekatron Join Date: Apr 2012 Location: Worksop, Nottinghamshire, UK. Posts: 5,553	Re: Are there any Ex GPO engineers here? Dorman Lamps Those NPN/PNP flashers had one timing capacitor and relied on the flash of light from the bulb on the LDR or photo diode for the other part of the timing. I have got a tatty one of the later yellow paraffin lamps.