EF86 as a volume pot, line pre 2008

[oldeurope]

EF86 as a volume pot, line pre 2008

read me

Hello,
you can find schematics and additional information in the blogs.
Use a web site translator to translate the text to your preferred language.
Signal schematic
Power supply schematic

Kind regards,
Darius

[Depanatoru]

What's the range ( dB) of your volume pot ? I can't find it in your blog . Thank you !

[oldeurope]

Originally posted by Depanatoru
What's the range ( dB) of your volume pot ? I can't find it in your blog . Thank you !

>60dB

[MRupp]

Very interesting concept, thank you for sharing. If I may ask a few questions:

How does it sound, did you compare it to other preamps that you built and how do you rate it compared to those topologies.

How good is channel balance with your design (assuming you had exactly the same control voltages for both channels)? Btw. I presume you could use a single mono pot to create the control voltage?

Thanks in advance.

[Wavebourn]

Try 6BA6

[oldeurope]

Originally posted by Wavebourn
Try 6BA6

Hi, this is not possible because link

website translator

[oldeurope]

Hello MRupp

I am happy with the sound after "tube rolling".
You have to find quiet ECC82 Gyrator triodes
and well matched EF86 to get a good channel balance.

A volume pot is definitely the easier way,
but I wanted a tube solution.

I am going to add a simple cable remote control (poti in a box)*
This makes sense to me.

Kind regards,
Darius

*500KA switch able in series to R11c