Bob Cordell's VinylTrak

[jeanbaptiste]

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Will require an external +/-15V DC power supply.
All parts available from Mouser
except the TKD main potentiometer.

There are switches that allow to choose between standard mode and Vinyltrak mode. And between "with diamond buffer" and without (I don't know the reason for that extra circuitry - I bypassed it myself).

 

[noviygera]

Jb,
Thanks for your offer and pictures! Great!
Why not use in vinyltrak mode?

 

[hirscwi]

I would love to get the gerbers and maybe also the BoM. Can you post here or should I send PM?

Cheers.

 

[Bob Cordell]

Hey!
I built it into a nice box.
I'd be happy to share gerbers and bom with you.
You can send the gerbers to JLCPCB that will be very cheap.
I'm not using it in 'Vinyltrak' mode, just regular RIAA but using the pseudo, open loop, JFET input.
Runs every day on my system.
Let me know.
jb
Will post some pictures.

Hi JB, Very nice job; the pictures look really good.

Cheers
Bob

 

[jeanbaptiste]

Jb,
Thanks for your offer and pictures! Great!
Why not use in vinyltrak mode?

no time to do it right yet!

 

[jeanbaptiste]

Hi JB, Very nice job; the pictures look really good.

Cheers
Bob

Hi Bob,
thank you!
May I ask you the reason for the diamond buffer when it is going straight to an opamp input?
Many thanks,
jb

 

[jeanbaptiste]

Hi all,
here are the design files
(schematics (untouched apart from the configuration switches), assembly drawing, gerbers)
Let me know if you build it!
jb

 

[noviygera]

Thanks jb,
does your design skip the vinyltrak mode circuitry? Also, any matching of transistors or other components required?

 

[jeanbaptiste]

Hi,
It is all optionnal : you can bypass it or not.
Same for the diamond buffer: you can have it in the pass or not.
Using configuration switches. You may want to hard wire the configuration you want (these are switches I had in the lab : I don't have a part number fo it).
The assembly drawing (PDF) should make clear how to configure the switches.
Matching transistors is not required: the LSK489 does the important job there itself.
Don't hesitate if you have mre questions,
jb