(Shishido Amplifier Skematic Amplificadores de Shishido Skematico)
He(Mr Nobukazu Shishido) Shishido) used to use some technic of inter stage transfomer .
his many amplifier are almost same technic of inter stage transfomer. he invented
call it's inverse phase connection under interstage transfomer amplifier.there are
almost use for Transmitter valves Amplifier as Audio Hi End Amplifier.some one call
it's Positive Grid Amplifier.just I will introducing you some circuit diagram of
shishido's amplifiers here.
not only these indicated above . he tried built up so many Power Hi End Amplifiers until Jan 1998.
he is not here now.
Note:Almost Shishido's Amplifier use Interstage secondary reverse
connection between sepalated wind for canselation of distortion.
Note: VT62 and 801 are same valuves ,only name is different.
and VT62(801) can use higher plate voltage until 600V but
VT25 is 425V.VT25 has 2 type filament.
VT25 and 10 are same kind of tubes.you can use until 425V plate voltage.
VT 25 has 2 type of filament .one of triado tangstain and oxiside tangstain.
one is brighting like 10W lamp the other is not.
VT62 and VT 25 if use for Class A amplifier power reach 3.8 W.
but if choose to use positive grid Class A Amplifier like Shishido's
,will be get around 8 W rms depend on Audio Transformer.DF is very
low so need to use same kind of NFB.Class A SET is not useful for General
Audio.sound caractor is diferent. sound like mosquit,
strike a" metal can sound" etc.but positve grid amplifier will be get
High Grade sound with NFB.High u(mew) triode tubes Amplifier DF is
slightly low general.
last up date 20th Sep 2023( if I have time I will going update
these shishido's files)
(since 11st Aug 2004 from Japan 2004-2014
