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Old 12th Jan 2010, 9:47 pm   #69
Ed_Dinning
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Join Date: Jan 2004
Location: Newcastle upon Tyne, Tyne & Wear, UK.
Posts: 8,171
Default Re: Homebrew Valve Tester

Hi Gents, yes there is always the question of switch carrying and breaking ratings as well as MBB and BBM.
On a tester I built many years ago, I used a simple plug board. H&S may be a problem if you need 117 volts but 50 should just be "in".
If we believe that a few heater voltages are required for everyday work these could be 4.0, 5.0, 6.3 and 12.6. The latter at under 1 A but the others need to be up to 3 A for some big rectifiers. There could be external sockets, or a switch for an external heater supply for the many other voltages that are encountered.

Ed
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