Dynaco Stereo 80, 160, & PAS-4.pdf

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10/7/2019
Dynaco Stereo 80, 160, & PAS-4
Dynaco PAS-4 Vacuum Tube Preamplifier
Dynaco Stereo 80 Vacuum Tube Power Amplifier
Dynaco Stereo 160 Vacuum Tube Power Amplifier
Dynaco Owner's
Manuals - with
Schematics -
in Acrobat format.
Stereo 80
Power Amplifier
Stereo 160
Power Amplifier
PAS-4
Preamplifier
With production starting in 1959, by the late 1960s hundreds of thousands
of
Dynaco Stereo 70
power amplifiers were in use world-wide, more than
any other stereo power amplifier. And in the 1990s, about 25 years after
their heyday, there were still many thousands in use internationally.
In the early 1990s there was a resurgence of interest in "vacuum tube
audio" as evidenced by the growing number of newly designed vacuum
tube based audio products appearing in trade magazines and showing up
at trade shows around the world.
In 1991 the Dynaco company had been purchased by the Panor
Corporation of Hauppauge New York, and in 1993 the Stereo 70 design
was updated, becoming the new Stereo 80 (vacuum tube version).
The Dynaco Stereo 70
Vacuum Tube Amplifier
The original Stereo 70 amplifier used EL34 output tubes and put out about
35 watts per channel. The updated vacuum tube version Stereo 80 also
used EL34 output tubes, supplying about 40 watts per channel.
Additionally, shortly after the release of the updated vacuum tube Stereo
80, there became available the Stereo 160 power amplifier, which used
6550 type output tubes, supplying about 75 watts per channel. It was,
however, built on the exact same size chassis as the vacuum tube Stereo
80, and so looked very similar to it.
The magazine ad from 1994 (below) introduces the modernized vacuum
tube Dynaco Stereo 80 - and the upgrade to the PAS-3 preamplifier, the
modernized PAS-4 vacuum tube preamplifier.
Note: There also existed the Dynaco
Stereo 80 Solid State Power Amplifier
The task of updating the circuitry for the vacuum tube Stereo 80, Stereo 160, and PAS-4 was accomplished by John Nunes
in San Jose, California. The PC board designs were done by Arn Roatcap in Sunnyvale, California. The factory assembly
of these three products was done for Dynaco by TIBI Electronics in Los Angeles.
https://goldpt.com/dynaco_80_120_pas4.html
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Dynaco Stereo 80, 160, & PAS-4
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https://goldpt.com/dynaco_80_120_pas4.html
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Dynaco Stereo 80, 160, & PAS-4
Dynaco Stereo 160 showing 6550 output tubes.
The Stereo 80 and Stereo 160 were available with either black or chrome front panels.
goldpointsales@gmail.com
https://goldpt.com/dynaco_80_120_pas4.html
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