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    Unusual early Dynaco PAS advertisement

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    Flyquail56

    Posts : 24
    Join date : 2009-05-04

    Unusual early Dynaco PAS advertisement

    Post by Flyquail56 on Sun Jun 08, 2014 10:50 pm

    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.  Very Happy 

    MontanaWay

    Posts : 767
    Join date : 2014-02-06
    Age : 58
    Location : Cameron, Montana

    Re: Unusual early Dynaco PAS advertisement

    Post by MontanaWay on Sun Jun 08, 2014 11:50 pm

    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.  Very Happy 

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

    MontanaWay

    Posts : 767
    Join date : 2014-02-06
    Age : 58
    Location : Cameron, Montana

    Re: Unusual early Dynaco PAS advertisement

    Post by MontanaWay on Sun Jun 08, 2014 11:51 pm

    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.  Very Happy 

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

    oops no...take it back :-)

    MontanaWay

    Posts : 767
    Join date : 2014-02-06
    Age : 58
    Location : Cameron, Montana

    Re: Unusual early Dynaco PAS advertisement

    Post by MontanaWay on Sun Jun 08, 2014 11:53 pm

    gotta love those old cabinets!!!....wish I could get hold of some!

    TN Allen

    Posts : 124
    Join date : 2013-01-01

    Re: Unusual early Dynaco PAS advertisement

    Post by TN Allen on Mon Jun 09, 2014 8:41 am

    I've been enjoying looking through this old magazine enjoying the ads. and images. Although I wasn't an adult when this was published, I did look at this sort of magazine and remember the advertising, much of that didn't change a few years later when I did start looking at audio mags. and much of the used equipment I bought was from around 1959. I have a more recent eBay Garrard shown in the Garrard ad.

    The Sherwood ad. on the contents page strikes me as an interesting mix of stilted text and visual encouragement. I noticed the Dynaco Stereo 70 $99.95 price was the same as what I paid in about 1968 or 69. The HH Scott ad on page 95 shows the output transformers on an amp aligned rather than rotated 90 degrees to each other, I've wondered about that occasionally.

    DynakitParts
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    PAS Ad

    Post by DynakitParts on Mon Jun 09, 2014 9:38 am

    I have never come across a PAS that looked like the one shown in this ad. I have been tooling around with Dynaco gear for nearly 40 years also....Getting old I guess?

    I suspect the sales promotion people got ahead of the actual production department...that may be a photo of the original prototype and never intended to be the final design.

    It would be nice to have this as part of the Dynaco legacy.

    Kevin


    Bob Latino
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    Re: Unusual early Dynaco PAS advertisement

    Post by Bob Latino on Mon Jun 09, 2014 11:46 am

    I agree with Kevin .. That photo of the Dynaco stereo preamp was probably a preproduction photo. It looks like a PAS-2 but has the knobs of a PAM-1. At some point Dynaco must have decided to not give their stereo preamp the same knobs as the PAM-1 mono preamp. All the PAS-2's that I have seen have the plastic knobs with the brass inserts. Later on the PAS-3 and PAS-3X, they went with the all brass knobs. Stereo records came out in 1958 and Dynaco quickly decided that for 1959 they had to come out with a stereo preamp and a stereo amp (the ST-70).

    Bob

    daveshel

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    Location : Tucson AZ USA

    Re: Unusual early Dynaco PAS advertisement

    Post by daveshel on Mon Jun 09, 2014 11:47 am

    A prototype several months before the PAS 2 was introduced?

    Bob Latino
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    Re: Unusual early Dynaco PAS advertisement

    Post by Bob Latino on Mon Jun 09, 2014 11:51 am

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

    Yes - because the ST-70 came out in 1959 but the PAS-2 came out the next year - 1960 ..

    Bob

    Flyquail56

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    Join date : 2009-05-04

    Re: Unusual early Dynaco PAS advertisement

    Post by Flyquail56 on Tue Jun 10, 2014 12:05 am

    The pre-production/prototype theory makes a lot of sense. I think I might see another difference as well. It's hard to be sure from a small photo, but looking at it again, it looks like the selector switch and volume pot are a bit low: on a horizontal line midway between the other six knobs/pots. On the production model of course they are a bit higher than that.

    TN, yes there are lots of great ads and articles in these old magazines. Imagine picking up a copy of Stereophile today and finding an article about the cathodyne phase inverter vs. the LTP. Or my favorite advertisement, the Static Master record brush, made with Jaguar hair and Polonium 210 as a static neutralizer  affraid Makes one wonder whatever happened to Nuclear Products Co. of El Monte, CA.

    Thanks everyone for your comments!

    TN Allen

    Posts : 124
    Join date : 2013-01-01

    Re: Unusual early Dynaco PAS advertisement

    Post by TN Allen on Tue Jun 10, 2014 7:59 am

    Flyquail,

    I missed the brush add, I'll look for it, wonder if one is available via Ebay?

    Later, I found this:

    Perhaps you saw this via Ebay:  http://www.adorama.com/CPSMB3.html?gclid=CMnQvpmm774CFbRxMgodWGgAfQ

    it's now Camel hair, but retains the Polonium neutralizing strip.


    Last edited by TN Allen on Tue Jun 10, 2014 8:28 am; edited 2 times in total

    GP49

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    Re: Unusual early Dynaco PAS advertisement

    Post by GP49 on Tue Jun 10, 2014 8:23 am

    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

    Posts : 124
    Join date : 2013-01-01

    Re: Unusual early Dynaco PAS advertisement

    Post by TN Allen on Tue Jun 10, 2014 8:30 am

    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.

    peterh

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    Re: Unusual early Dynaco PAS advertisement

    Post by peterh on Tue Jun 10, 2014 10:14 am

    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.
    Yes, 2 advantages :
    1/ less cost , one could usually tap the power amp for the small amount needed
    2/ less hum as there is no 220 / 110V AC in the preamp box.

    TN Allen

    Posts : 124
    Join date : 2013-01-01

    Re: Unusual early Dynaco PAS advertisement

    Post by TN Allen on Tue Jun 10, 2014 11:20 am

    "... 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.

    peterh

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    Re: Unusual early Dynaco PAS advertisement

    Post by peterh on Tue Jun 10, 2014 2:30 pm

    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.
    Or the power supply could be at a distance in it's own screened box.

    DynakitParts
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    Re: Unusual early Dynaco PAS advertisement

    Post by DynakitParts on Tue Jun 10, 2014 5:22 pm

    Not exactly the same as what Dynaco did with the power supply for the PAM.....but you can mount the PA-211 power transformer on the rear panel of the PAS like Frank Van Alstine does with his Super PAS preamp upgrade. Although his reasoning for this was to acheive the added space within the chassis for his upgraded power supply board...I suspect there would be some added benefit of doing this. Our reproduction Dynakit PAS chassis has provisions for this type of mounting.

    Kevin

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