1178 FET substitute

ijr

Well-known member
Joined
Jun 6, 2004
Messages
204
Location
Israel
Hello to all!
1178 have different vca and bias circuit than 1176.
But it can be made with DOA instead of soundpath opamps
and run +/-24 PS....

Some questions to guru's:

Can BF245A be FET substitute here?
Have anyone schematic version of 1178 with "distortion trim" pot?
So-called "british mode": how can it be implemented here?
Thank You.
 

ijr

Well-known member
Joined
Jun 6, 2004
Messages
204
Location
Israel
Thank You Fader! :)))
Are these /dual fet NPD5566 / were used in 1178?
Schematic shows dual fet q7 and anything more;
one 1178 I repaired year or more ago
had strange numbering on fet (I did not find it on NET)...
 

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