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Old 12th Apr 2010, 10:11 pm   #9
Michael Maurice
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Join Date: Feb 2006
Location: Wembley, Middlesex
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Default Re: Philips Hi-Z record player

Quote:
Originally Posted by roxarama View Post
The valve diagram inside shows 4 of them - ECC83, EL84, UL84 and EZ80. A 5th is an 8073D-00 which may be the power light, which works fine.
That UL84 appears to be wrong, should be another EL84 unless the valve diagram actually shows UL84 which I doubt that it does.

Let me explain, the first letter denotes the valve heater,

E = 6.3V the current will vary depending on the valve. the heaters on these valves are wired in parallel

U = 100mA the current through the valve is 100mA but the voltage will differ according to the valve. The heaters on these valves are wired in series.

P = 300mA ditto the above.
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