Two tube guitar head in one output cabinet

[Feral Feline]

Take a look at this picture of the guts of a radial headbone VT:

LOTS going on in there. Big traces for the power amp signal routing. 250vac/10amp rated relay handles the switching of the power amp signals.

It simultaneously switches the guitar inputs as well. Likely how they get away with such a small resistor as a dummy load.

It's possible to build one, but similar considerations would be necessary. This is more like switching line voltage than typical guitar signals: if you're not used to dealing with potentially deadly electrical circuits...well, you might want to see about just picking one of these things up used.
View attachment 82503

As I used to say looking at any trail no matter its difficulty or steepness: "That looks totally rideable...", no matter how far from the truth.

That HEADBONE gutshot... lotsa space, through-hole components — "That looks totally traceable, buildable — stick it in the wish-list!"


Alvaro, build yourself a two-in-one cab, ie two completely independent speaker circuits in one big tall box (makes loading in/out easier when you have to move one thing, so long as it isn't too heavy).

I'd go vertical for better side-to-side stage coverage:



The slant takes care of small stages where you have to stand too close to your speaker, so your sound isn't totally blowing past your knees.



Advantages :
- totally DIYable
- both your amp-heads have their own speaker and are happy;
- you don't die trying to cobble together something that even experienced builders leave to the professionals.
- if you still need muting: far easier to wire up STANDBY-type footswitches than to deal with figuring out ohms, loads, switching, electrocution...

 

[alvaro]

As I used to say looking at any trail no matter its difficulty or steepness: "That looks totally rideable...", no matter how far from the truth.

That HEADBONE gutshot... lotsa space, through-hole components — "That looks totally traceable, buildable — stick it in the wish-list!"


Alvaro, build yourself a two-in-one cab, ie two completely independent speaker circuits in one big tall box (makes loading in/out easier when you have to move one thing, so long as it isn't too heavy).

I'd go vertical for better side-to-side stage coverage:

View attachment 82512

The slant takes care of small stages where you have to stand too close to your speaker, so your sound isn't totally blowing past your knees.



Advantages :
- totally DIYable
- both your amp-heads have their own speaker and are happy;
- you don't die trying to cobble together something that even experienced builders leave to the professionals.
- if you still need muting: far easier to wire up STANDBY-type footswitches than to deal with figuring out ohms, loads, switching, electrocution...

thanks, is clear for me, and i preffer a cabinet, tks for the idea to made independent speaker

 

[jwin615]

As I used to say looking at any trail no matter its difficulty or steepness: "That looks totally rideable...", no matter how far from the truth.

That HEADBONE gutshot... lotsa space, through-hole components — "That looks totally traceable, buildable — stick it in the wish-list!"


Alvaro, build yourself a two-in-one cab, ie two completely independent speaker circuits in one big tall box (makes loading in/out easier when you have to move one thing, so long as it isn't too heavy).

I'd go vertical for better side-to-side stage coverage:

View attachment 82512

The slant takes care of small stages where you have to stand too close to your speaker, so your sound isn't totally blowing past your knees.



Advantages :
- totally DIYable
- both your amp-heads have their own speaker and are happy;
- you don't die trying to cobble together something that even experienced builders leave to the professionals.
- if you still need muting: far easier to wire up STANDBY-type footswitches than to deal with figuring out ohms, loads, switching, electrocution...

But make sure your signals are in phase between the two amps if using a sealed cabinet.

 

[Feral Feline]

Good point jwin615.
I failed to mention that the speakers are of course sealed off from each other, but nonetheless the signals must still be in phase.