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Ed_Dinning · 15th Jan 2010, 10:22 pm

Hi Gents, I now have some lams for this transformer that I will try and get wound and sent off to Mike next week.
It looks as if it will fit on a 78 lam (95mm high, 80mm wide and a 40mm stack; about 70mm over the "belly").
It will have a 0-10-210-230-250 primary (110V can also be provided but as a different transformer).
0-250V at 120mA
0-30v at 20mA
0-6v at 50mA (times 3)
0-4-5-6.3 (@3A)-12.6v at 1A

I have yet to finalise the costing but this spec appears to be the minimum that is required. Inputs please.

For those who need a wider range of heater voltages I will look at an aux transformer, possibly about 2/3rds the size of the main one, which would have the heater voltages not supplied by the main unit. This would run from the 230V tap on the main transformer so that adjustment of the main input also sets the heater tranny.

Best regards, Ed

15th Jan 2010, 10:22 pm	#78
Ed_Dinning Dekatron Join Date: Jan 2004 Location: Newcastle upon Tyne, Tyne & Wear, UK. Posts: 8,195	Re: The "Sussex" Homebrew Valve Tester. Hi Gents, I now have some lams for this transformer that I will try and get wound and sent off to Mike next week. It looks as if it will fit on a 78 lam (95mm high, 80mm wide and a 40mm stack; about 70mm over the "belly"). It will have a 0-10-210-230-250 primary (110V can also be provided but as a different transformer). 0-250V at 120mA 0-30v at 20mA 0-6v at 50mA (times 3) 0-4-5-6.3 (@3A)-12.6v at 1A I have yet to finalise the costing but this spec appears to be the minimum that is required. Inputs please. For those who need a wider range of heater voltages I will look at an aux transformer, possibly about 2/3rds the size of the main one, which would have the heater voltages not supplied by the main unit. This would run from the 230V tap on the main transformer so that adjustment of the main input also sets the heater tranny. Best regards, Ed