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Old 24th September 2009, 06:54 PM   #1
skal is offline skal  United Kingdom
diyAudio Member
Join Date: Sep 2009
Question valve sub

Ok firstly i am new to the valve screen and i have limited knowledge about these device's .

i would like to make a tone control circuit that i found in the RDH4 book, it is base around a 6sf5 metal type tube i think it is a pentode i might be wrong it has 8 pins.

How would i go about subbing that valve for a 9 pin base one i was thinking i could use a ecc85 or 12at7.

Any help would be appreciated

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