Need help with a 6SN7 preamp schematic

[Badge]

I have a old drawing for a 6SN7 preamp schematic. It is one channel of the design. Tube sections are tied together. Big question is will it work?? Thanks

Dropbox - pre20171112_11003076.pdf

 

[leadbelly]

Yes, it will work. However, why this? It is somewhat odd, and neither optimized for hifi nor musical instrument use.

 

[Badge]

Can you recommend a better option? Thanks

 

[kodabmx]

I use this and love it.

 

[Badge]

Any suggestions how to improve on the one I posted?

 

[leadbelly]

Match? Lighter?

There's countless tube preamp designs out there and you haven't said what it needs to do and so on.

However, assuming you landed on a single 6SN7/channel as a design criteria for a good reason, this would be a better way to go.

Frank's Ultimate Tube Preamp.

EDIT: and zeroing in on the design: http://www.diyaudio.com/forums/tubes-valves/274356-frank-6sn7-pre-regulated-supply.html#post4326897
I recommend the bottom dc-coupled version

 

[audiowize]

We can't really say whether it will work unless you're more specific about what you want it to do. Compared to just about all other tube preamp designs that you're going to run into that have been drawn up in the last ten years or so yours:

1. Has very high output impedance.
2. Has an unnecessary cap at the input.
3. Runs ridiculously low current. This has many negative consequences and alone is enough of a reason to not build what's drawn.
4. Has kind of a low value resistor at the output given all other considerations of the preamp.

Build what Koda posted, it will cost you a few extra 2 cent resistors but will work much better.

 

[Too much stuff]

I use this and love it.

Wondering if there is a uF value range for the 4uF output cap.

 

[Eli Duttman]

The value of the O/P coupler depends on the I/P impedance of the downstream stuff. 4 μF. will work into the IHF "standard" 10 Kohm load. It's a matter of lowest common denominator.