UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Bush TV22 Mk2

Lloyd 1985 · 16th Oct 2019, 11:11 am

There is one thing to look out for which I haven’t seen mention of yet, there are some wax caps decoupling the valve heaters on the RF deck, which if not at least disconnected before attempting a power up can short out and over run some of the valve heaters and the CRT heater. They don’t normally short out right away either, so you think you have got away with it until next time you power the set up and notice it only took 10 seconds for the line whistle to start, then look round the back of the chassis to see some valve heaters not lit at all, and the ones that are lit are glowing like light bulbs!

Regards
Lloyd

16th Oct 2019, 11:11 am	#15
Lloyd 1985 Nonode Join Date: Jun 2008 Location: Coningsby, Lincolnshire, UK. Posts: 2,820	Re: Bush TV22 Mk2 - first approach using a variac There is one thing to look out for which I haven’t seen mention of yet, there are some wax caps decoupling the valve heaters on the RF deck, which if not at least disconnected before attempting a power up can short out and over run some of the valve heaters and the CRT heater. They don’t normally short out right away either, so you think you have got away with it until next time you power the set up and notice it only took 10 seconds for the line whistle to start, then look round the back of the chassis to see some valve heaters not lit at all, and the ones that are lit are glowing like light bulbs! Regards Lloyd