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I finally get that tube for F.M. In fact I made a small modification. That tube was EC 92 and I put an PC 92. Some one inserted a small resistence, because the heater voltage at EC 92 is 6,3 V @ 150 mA and at PC 92 3,6 V @ 300 mA.
But still dosen't works propley. Still have distorsion (both when I use the it as an amplfier or when I use it on F.M.; on F.M. some recived station are having more distortion then others).
@Tom Bavis: thank you for the schematics.
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OLD, but ORIGINAL, not Made in CHINA.
Sailor Moon
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