How do you have negative AC?Hm how about having negative values? why stop at 0?
I get what you're saying, but a Variac set to 50% is putting put 50% voltage, not 50% power. Below a certain voltage, tube circuits just stop functioning altogether.variac reduction range that goes farther down than 50%, preferably down to 0%
Below a certain voltage, tube circuits just stop functioning altogether
I think this was intended to be a bit of sarcastic humor.How do you have negative AC?![]()
I run negative AC on my thermostat via the Heat setting.How do you have negative AC?![]()
The Axe-fx would start generating power and you could run your house on it!How do you have negative AC?![]()
Cliff: "Elon, hold my beer."The Axe-fx would start generating power and you could run your house on it!
I just use a real variac on my Axe-fx. It does the trick!I meant that, below a certain point on the Variac, a tube amp literally stops working. You can accurately simulate that by turning the volume all the way to zero.![]()
lolI just use a real variac on my Axe-fx. It does the trick!
That's the point, to bring the power low enough to introduce the pleasing intricacies. With variac parameter at ~65%, reducing the power tube grid bias parameter very far to the left brings everything down to crackles, at a certain point they just shut off. Variac parameter range lower than 50% you could leave grid bias parameter alone and still bring the whole amp down into that edge-of-bias break up range, preamp along with it.
Variac range down to 0% would also let you to starve the preamp sections down into that extra breakup range when using them without the power amp simulation, 50% variac doesn't seem to have a very drastic effect on preamp feel when using them with the power amp turned off. Maybe if you were able to starve the IIC+ preamp down to 10% variac nobody would be asking for a studio pre anymore, or if you were able to starve a high gain marshall preamp down to 15% variac, maybe it would scratch the ADA MP-1 itch. Rack preamp breakup always feels so soft compared to heads/combos