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Old 8th January 2012, 06:20 AM   #11
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just about to - thanks P10 and Mach1 for the math... Have all the bits and the family is away, weather is crap so onward...
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Old 8th January 2012, 09:44 AM   #12
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My first amplifier used E/PCL86. With proper OPTs it performs really well. Schematic was pretty standard but modified along the way numerous times. I think it is fixed bias now and has cathode + direct anode feedback or so. The correct value for the OPT is 7k for the 250V-36mA operating Point, not 5k !! I used Reinhöfer (Röhrentechnik.de) 53:00 type for this.
I hardly use the amp now because 4W is a not much Power. It's standing near my workbench in the cellar now and plays a little music/radio when I solder. EMM801 is switched off. It turns you crazy when you see this flickering from the corner of the eye
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Old 15th October 2012, 08:49 AM   #13
romicap is offline romicap  Romania
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yes, i`am built one!
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