Dynaco Dyna PAS PC5 PC6 pcb

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Dynaco Dyna PAS PC5 PC6 pcb

Postby erez1012 » Fri Sep 30, 2016 6:28 am


want to build this phono stage for my new TT. what do you think about this amp, i look for good&warm sound.

the pcb on ebay and its very easy to build, i have PS 300 vdc and 12ax7 already.

can i only build PC6 (phono stage) and not PC5?

TT > PC6 > amplifier

thanks :)
DynacoPAS2_PAS3schematic_1280.jpg (202.79 KiB) Viewed 4596 times
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Re: Dynaco Dyna PAS PC5 PC6 pcb

Postby Geek » Fri Sep 30, 2016 1:59 pm


You can. The PAS is more of a full-bottomed-and-cut-top sound.

erez1012 wrote:...i look for good&warm sound.

Maybe check out a Marantz 7c clone?

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Re: Dynaco Dyna PAS PC5 PC6 pcb

Postby erez1012 » Sat Oct 01, 2016 12:11 pm

More precisely, I am looking phono tube pcb on eBay:
i found the marantz 7 and Dynaco Dyna.

i have 12ax7 and PS so this pcbs more match to me.

If you have any other suggestions would love to hear .
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Re: Dynaco Dyna PAS PC5 PC6 pcb

Postby paart » Sat Oct 01, 2016 7:30 pm

The Dynaco PAS circuit that you reference was designed in the 1950’s, and has well-known very significant problems with both the line and phono stages. An engineer, Norman Koren, worked out major circuit revisions some years ago, that make a great improvement in the sound quality of both sections of this preamp. If you would like to read about this circuitry, and what is involved, the information is here:

The above poster that replied to you, Geek, is the only source of which I’m aware for pre-made boards for the Koren circuit---and the bad news, is that he is getting out of the business of supplying these boards, as well as other PCB’s.

I’ve been using the Koren line stage in my PAS for a number of years, and continue to be extremely happy with it; so much so, that I just ordered two additional Koren boards, from him, while they are still available.
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Re: Dynaco Dyna PAS PC5 PC6 pcb

Postby Gingertube » Tue Oct 04, 2016 11:19 pm

Highly regarded modern design kits for line amps, phono preamps etc.

Scroll down to the phono preamps.

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