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zircontweezer
 Post subject: Screen Resistor query
PostPosted: Sat Dec 19, 2009 3:34 pm 
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Hi I'm looking at the schematic and it shows an individual 100 ohm resistor for each EL84 but the Layout has just one 100 ohm shared by both tubes. I've read that the original 18watt had no resistors there at all but doesn't this create a 50 ohm load for each screen? using the layout version. Does it matter?
Edit; I'm using the TMB sIII schem/layout.
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zaphod
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PostPosted: Mon Dec 21, 2009 8:25 pm 
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The original 18W had a single, shared 100 ohm resistor. I usually increase that to 1k to help improve tube life.

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