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Thread: ST70
series I vs series II

Started 4 years
ago by ferninando

what's the difference
and how can you tell one from the other. Are they
marked?

Top contributing authors:

Name

Posts

ferninando

2

user's latest post:

ST70 series I vs series II

Published (2011-03-19 10:57:00)

thanks for the info. I had read of there being 2 series and
wondered what was different about them. I have a orig series I in
excellent cond and a new can cap, 1N4007 diode and Cs for the bias
ckt and new resistors to do a simple refurb. I know, the resistors
may not all need replacing but if I have to get 1 new resistor I
mite as well get them all as the shipping is the same and I get some
other items at the same time. I use tubedepot
for...

Bill H

1

user's latest post:

ST70 series I vs series II

Published (2011-03-19 20:15:00)

Series II was manufactured by Panor (I believe) and did not
have the PAM (octal) preamp sockets in the front. Instead, there
were 4 bias LED's and 2 pots for bias adjustment.

2010 AR D79A

1

user's latest post:

ST70 series I vs series II

Published (2011-03-24 06:45:00)

From the standpoint of being a "Dynaco collector" the Series II
is far less common. Bob Latino[/QUOTE] Thanks Bob,due my address is
19 hours flight from US,of course I am The Proud owner of The both
series I&II,Praise The Lord, they were bought from locall which
220Volt AC inchluding SoundValves VTP100 pre Amp too, My Pas 3X pre
Amp(110Volt AC) was imported from US and so my Magnepan magneplanar
speakers, imagine the shipping...

Destructor

1

user's latest post:

ST70 series I vs series II

Published (2011-03-25 07:46:00)

The series II has a somewhat more modern cleaner look but still
goes well with vintage gear. Mine has been very dependable and looks
very nice next to my MX110.

Bob01605

1

user's latest post:

ST70 series I vs series II

Published (2011-03-19 10:18:00)

A few other differences between the original Dynaco ST-70 and
the ST-70 Series II .. All Series II's had a driver board cover. On
the original ST-70 only the factory wired ST-70's had driver board
covers. The Series II used a 6GH8A driver tube while the original
used a 7199. The 6GH8A is basically the same tube as the 7199 but
with a different pin out. On the Series II the negative feedback
line is taken off the 8 ohm tap. On
the...

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Forum:

Tube Audio

Total
authors:

5 authors

Total thread
posts:

6 posts

Thread
activity:

no new posts during last
week

Domain info for:

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Other posts in this thread:

Reply
1: ST70 series I vs series II

Bob01605 replied 4
years ago

A few other differences between the original
Dynaco ST-70 and the ST-70 Series II .. All Series II's had a driver
board cover. On the original ST-70 only the factory wired ST-70's
had driver board covers. The Series II used a 6GH8A driver tube
while the original used a 7199. The 6GH8A is basically the same tube
as the 7199 but with a different pin out. On the Series II the negative
feedback line ...

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Reply
2: ST70 series I vs series II

ferninando replied
4 years ago

thanks for the info. I had read of there being
2 series and wondered what was different about them. I have a orig
series I in excellent cond and a new can cap, 1N4007 diode and Cs
for the bias ckt and new resistors to do
a simple refurb. I know, the resistors may not all need replacing
but if I have to get 1 new resistor I mite as well get them all as
the shipping is the same and I get some other ...

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Reply
3: ST70 series I vs series II

Bill H replied 4
years ago

Series II was manufactured by Panor (I
believe) and did not have the PAM (octal) preamp sockets in
the front. Instead, there were 4 bias LED's and 2 pots for bias
adjustment.

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Reply
4: ST70 series I vs series II

2010 AR D79A
replied 4 years ago

From the standpoint of being a "Dynaco collector"
the Series II is far less common. Bob Latino[/QUOTE] Thanks Bob,due
my address is 19 hours flight from US,of course I am The Proud owner
of The both series I&II,Praise The Lord, they were bought from
locall which 220Volt AC inchluding SoundValves VTP100 pre Amp too,
My Pas 3X pre Amp(110Volt AC) was imported from US and so my
Magnepan magneplanar ...

Show more post info

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Reply
5: ST70 series I vs series II

Destructor replied
4 years ago

The series II has a somewhat more modern
cleaner look but still goes well with vintage gear. Mine has been
very dependable and looks very nice next to my MX110.

Show more post info

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