Point To Point, 100 Percent, No Kit

knowledge base for the classic Dynaco ST70

Point To Point, 100 Percent, No Kit

Postby eddiegnz1 » Tue Oct 29, 2013 6:39 am

How (where) can I get either instructions, diagrams, or teachings to assemble from scratch an ST70 ? What I mean is to not use a kit. Therefore, I myself would acquire the individual parts from any number of sources...Including, resistors, caps, chockes, transformers, chasis, sockets, and etcetera. I would like to do this without circuit boards (no PCB, neither for driver board nor for power supply cap board) and simply do it all one hundred percent point to point with wires.

I would still like to find a way to build it as above even though I have received the following advice;

1) begginers should start with a kit not P2P
2) this is more dangerous
3) this is far more difficult
4) it won't look as nice (e.g. your chasis will be ugly, etc)
5) there's no advantage to doing it like that
6) this will take you so much longer
7) kits are proven and there's more support
8) ....and much much more

yes, I'm a little determined (or stubborn) and I appologize for that...but nevertheless, if you know of any resources or have thoughts that might help me achieve my goal, that would be hugely appreciated.

Kind thanks,
Eddie
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Re: Point To Point, 100 Percent, No Kit

Postby hilldweller » Tue Oct 29, 2013 8:06 am

Bricks too tall will fall!
It takes mud to keep it all together.
GOD Bless tube amps.
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Re: Point To Point, 100 Percent, No Kit

Postby Shannon Parks » Tue Oct 29, 2013 12:27 pm

Here's the original manual:
http://www.the-planet.org/dynaco/Amplifier/ST70.pdf

You can use the power supply and bias supply straight from the manual. You can probably do the original driver circuit using a turret board.

Shannon
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Re: Point To Point, 100 Percent, No Kit

Postby SDS-PAGE » Thu Oct 31, 2013 2:12 pm

It's doable but it take some work. Here is one that I built a while ago using Shannon's ST-70 circuit:

http://www.tubeaudiolab.com/id94.html
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Re: Point To Point, 100 Percent, No Kit

Postby TerrySmith » Sun Dec 08, 2013 5:32 pm

There were actually P to P stereo 70's made, they were used in organs and was painted instead of nickel plated.

Building a P to P '70 ain't too bad, draw it out to scale on paper first. If you use a '70 chassis cut a piece of metal to fill the PCB hole or design and order one from Front Panel Express
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