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IanG3XYV · 18th Jun 2018, 4:13 pm

Good work Andy. I've been thinking of doing something similar to test some high power RF valves I've got and you have provided me with some inspiration.

Looked at your video and I'm sure I spotted a TEK 500 series scope and the big transformer you are using must originate in such a scope. I've got one too and it would be ideal for supplying a high power amp. They are superb and solid transformers with lots of secondary windings, HT and LT. Heavy of course but that's what is needed. Interesting that the TEK 500 power supplies build up to the needed voltages by adding up lower HTs in series to achieve around 600 volts in the 585 so I'm sure TEK will have built in sufficient isolation between windings and core. I should add that I do have a working 544 that I restored and it will remain so!

Ian

18th Jun 2018, 4:13 pm	#9
IanG3XYV Pentode Join Date: Sep 2014 Location: Bedford, Bedfordshire, UK. Posts: 174	Re: Testing 813's. Good work Andy. I've been thinking of doing something similar to test some high power RF valves I've got and you have provided me with some inspiration. Looked at your video and I'm sure I spotted a TEK 500 series scope and the big transformer you are using must originate in such a scope. I've got one too and it would be ideal for supplying a high power amp. They are superb and solid transformers with lots of secondary windings, HT and LT. Heavy of course but that's what is needed. Interesting that the TEK 500 power supplies build up to the needed voltages by adding up lower HTs in series to achieve around 600 volts in the 585 so I'm sure TEK will have built in sufficient isolation between windings and core. I should add that I do have a working 544 that I restored and it will remain so! Ian