Soldano Sloo without the poweramp section?

[Oddvar]

Hi.  Is there a way to build this Slo without the power section?

[92Volts]

Sure, but a schematic is a better starting point than a layout to figure out/make changes like that.

Usually everything past the Master Volume control is considered part of the poweramp. Often this includes 1 additional "preamp tube" which is used as the phase inverter. Different poweramp designs would use different phase inverters, and single-ended poweramps don't even have one, which is why it's not considered part of the preamp.

What are you using it for? Driving a different vacuum-tube poweramp design? Easy. Take everything before the Master Volume of this amp and hook it to everything after the Master Volume of a different design.

Driving headphones? Not so easy, you still need a "poweramp"-- a smaller one-- to do this. You'll also want to reduce treble to simulate the changes a guitar speaker makes to the sound.

A recording interface or the input of another amp? Probably easier than headphones, but you'll still want a lower voltage signal and maybe the ability to supply more current.

[shooter]

here's how I would do it-ish.  read the footnote

[Oddvar]

Thanks for this.  I am thinking of using it for the Reload Torpedo Loadbox, direct to daw.

[guitardude57]

The diagram shown would work. 


You could even place a level pot before the FX/output jack...

[92Volts]

Thanks for this.  I am thinking of using it for the Reload Torpedo Loadbox, direct to daw.

I don't think the direct-in function of that loadbox simulates the effect a speaker would have on the sound. If it's not doing that, you might as well hook this preamp straight to the DAW.

Now, you probably do want a device that simulates the effect a speaker would have on the sound... that loadbox can do that but only using the 4, 8, or 16 ohm impedance settings which need to be driven by a poweramp!

You could build a significantly smaller, cheaper poweramp to go with the SLO preamp. Or if you don't have that loadbox already, make sure you get one that will do speaker/cab simulation starting with a line-level signal.

If you can (and want to) do speaker/cab simulation digitally, there should be no problem hooking this preamp straight to the DAW. I would lower the value of that resistor as described on the schematic to keep the signal low and not overdrive the DAW.

[shooter]

I 'm missing something, is the OD side 180 out from the normal at the mix R's? 
guessing it works, just seems odd

[DummyLoad]

I 'm missing something, is the OD side 180 out from the normal at the mix R's? 
guessing it works, just seems odd

yes, does it matter? with VR1 and VR2 seems like only one path is active at any given time.

--pete

[shooter]

  I was just looking at my cropped version, which don't have notes!!
resume normal programing, n Thx Sir.

[Tone Junkie]

Look at the soldano X88 its what your wanting with a better crunch channel.
Bill