All images Credit: eBay Seller "Starsky10"

 Dynaco / Dyna-Kit PAS 3X Tube Preamplifier

Designed by Ed Laurent and introduced by Dynaco in 1966, the PAS series of stereo amplifiers are renowned by audio enthusiasts the world over.

As with many Dyanco produts, the preamplifier was sold under the Dyna-Kit name for $69.95 as a build it yourself kit.  There was also an option to buy it fully assembled for $89.95.

Check the back panel of your PAS preamplifier - if the speaker binding posts and RCA jacks are attached with screws, then it was originally built as a kit.  If there are rivets, you have a factory wired unit.

More specs and pictures after the break.

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Dynaco PAS Series Tube Preamplifier (PAS / PAS2 / PAS3 / PAS3x

The Dyanco PAS-3X stereo preamplifier is a two channel control center which permits either monophonic or stereophonic reproduction from any program source, with any modern amplifier.

This preamplifier design is most renowned for it's low noise and distortion, and it provides striking simplicity of operation while retaining full flexibility for the enthusiasts subtle adjustments.

Specifications

Inputs: 3 stereo low level, RIAA phono, NAB tape head, special, 4 stereo high level

Distortion: less than 0.05%

Frequency response: 10Hz to 40kHz

Gain: 60dB (phono, tape), 20dB (line)

Tubes: 12AX7 (ECC-83), 12X4

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