Updated schematic for Ruby Tuby

[slajeune]

Hi All,

I have updated the schematic of the Ruby Tuby.  This version now has the following additions:

- OPAMP (1/2 a TL072) in front of the tube
- A Volume control at the input of the LM386

I am getting very close to a good hybrid amp.  I will play around with various caps and other stuff like that to see how I can change the sound a bit.  I tried adding a very simple low pass filter (i.e. a pot + a cap) right before the volume control but, it basically lowered the output of the amp too much.  I will investigate other types of tone controls.

Here is the link:

http://www.geocities.com/slajeunesse/ruby_tuby.html

You need to cut and paste the URL in a new window.

Thanks,
Stephane.

[The Tone God]

I may have some updates for you soon. I'm right now busy zapping myself with other tube projects. I'll let you know soon.

Andrew

[slajeune]

Hi Andrew,

no sweat, I really appreciate your help!  If I can, I would like to remove the opamp that drives the tube.  Keep me posted!

Stephane.