Line Out / D.I. output

[Bainzy]

does anyone have a schematic/diagram for adding one of these to an amp, with speaker emulation?

[Eoin]

I don't know about the speaker emulation, but if you have a look through some of the more modern Marshall amp schematics on www.schematicheaven.com you might be able to reverse engineer a Line Out or DI that suits your amp.

[Billy Batz]

The 1987x schem has a line out on the 4ohm tap that has a 2k2 resistor on the 4ohm signal, in series with a 100R to ground with a 560R going from the junction of the two to the line out tip.

The Dual Channel JCM800 schem has the line out again on the 4ohm tap with a 1k resistor going to the CCW lug of a 4k7 pot with the wiper on the Line Out jack tip and what looks like a 100R on the tip tor ground.

Those are Line outs. To go DI you need a cab sim.

[Eoin]

I saw an interesting amp which had a DI output as a tap on the secondary of the opt. Haven't really seen it anywhere else in guitar opts. Must figure out how it works. It's the kind of gimmicky thing that I love.

Practically speaking I think a DI is just a balanced Line, so it shouldn't really be too hard to get there from a line out. But it would require a transistor. Or a transformer.

[rjgtr]

The Marshall Stufio 15 used a secondary tap on the OT.

However, if I were you I'd just buy a Red Box or the Compensated Behringer DI. Plug it in and you're ready to go.

[Bainzy]

I've seen the Torres kits for this, and was just thinking I'd like to have my own way of making them as opposed to buying a kit for them - it would make things a lot easier if I started making my own amps as a business, or offering them as optional mods.

[Eoin]

Well, you could buy the kit and reverse engineer that.