Unusual early Dynaco PAS advertisement

Flyquail56 wrote:I have been reading the October 1959 issue of Audio magazine that someone has kindly made available online at http://www.americanradiohistory.com/Archive-Audio/50s/Audio-1959-Oct.pdf  and noticed a preamp in the Dynaco advertisement on page 83 that I have never seen before. It is described in the copy as New Stereo Preamplifier rather than PAS or PAS-2.  

The unusual features are the white knobs, the same as the mono preamp, and the location of the Dynakit script logo in the brown strip along the bottom of the faceplate, just to the right of center, as opposed to being in the brass area below the selector and volume controls. Everything else about the preamp appears to be typical PAS.  

The history buff in me is fascinated by this, as I have never seen one in the nearly 40 years I have been fooling with Dynaco amps. Does anyone know more about this unit? I am wondering if any of these made it into production as pictured in this ad or if perhaps the knobs and logo were changed before the first ones shipped, as 1959 would be the year that the PAS was introduced.  Trivia maybe, but hopefully I am not the only one to find it interesting.   

MontanaWay wrote:

Flyquail56 wrote:I have been reading the October 1959 issue of Audio magazine that someone has kindly made available online at http://www.americanradiohistory.com/Archive-Audio/50s/Audio-1959-Oct.pdf  and noticed a preamp in the Dynaco advertisement on page 83 that I have never seen before. It is described in the copy as New Stereo Preamplifier rather than PAS or PAS-2.  

The unusual features are the white knobs, the same as the mono preamp, and the location of the Dynakit script logo in the brown strip along the bottom of the faceplate, just to the right of center, as opposed to being in the brass area below the selector and volume controls. Everything else about the preamp appears to be typical PAS.  

The history buff in me is fascinated by this, as I have never seen one in the nearly 40 years I have been fooling with Dynaco amps. Does anyone know more about this unit? I am wondering if any of these made it into production as pictured in this ad or if perhaps the knobs and logo were changed before the first ones shipped, as 1959 would be the year that the PAS was introduced.  Trivia maybe, but hopefully I am not the only one to find it interesting.   

I get a blank page.......

daveshel wrote:A prototype several months before the PAS 2 was introduced?

GP49 wrote:Not mentioned in that Dynaco ad: the "stereo preamp" constructed from two PAM-1 and the DSC-1 Stereo Adapter, all mounted together, if desired, on a common faceplate.  Ungainly, awkward to use (you had to select the source on both PAM-1 chassis) and more expensive overall though if one had a PAM-1 already, it preserved that investment.  The PAS-2 was much more elegant and practical though it gave up the selectable phono EQ of the PAM-1.

TN Allen wrote:

GP49 wrote:Not mentioned in that Dynaco ad: the "stereo preamp" constructed from two PAM-1 and the DSC-1 Stereo Adapter, all mounted together, if desired, on a common faceplate.  Ungainly, awkward to use (you had to select the source on both PAM-1 chassis) and more expensive overall though if one had a PAM-1 already, it preserved that investment.  The PAS-2 was much more elegant and practical though it gave up the selectable phono EQ of the PAM-1.

I've wondered if there are advantages to taking power off the power amp for the preamp as I assume was done for the early Dynaco premaps.

TN Allen wrote:"... less hum as there is no 220 / 110V AC in the preamp box."

I had wondered when struggling with a little hum in a PAS3X upgrade if that might be a reasonable solution, provided one didn't mind tethering the preamp and amp together. It might be a worthwhile option if offered.