dual tone pot

[scole]

i noticed the tiny terror hand wired has dual pots, i understand the master vol and gain but the dual tone pot has me wondering how it works

[Jazz P Bass]

"Inventing Terror
The Tiny Terror utilizes class A valve technology with a 100% analog signal path that eliminates any and all digital clipping output characteristics. Driven by a pair of EL84 power valves and a front end that utilizes a duct of 12AX7 preamp valves. Switchable from 7 to 15 watts of output, Orange designers have designed the gain structure of the Tiny Terror to work in a very unique way; utilizing a dual gang gain pot, one side turns up the first gain stage to the point of very heavy compression, while the other side changes the impedance of the second gain stage so that it to compresses to the same degree.

It utilizes a five section fully filmed interleaved output transformer that is very closely balanced to primary. The EL84 output tubes are cathode biased to around 90% in the 15w position, and 96% in the 7w position. In short, the Tiny Terror is designed to produce as much gain as a four stage gain pot, but the output tubes are driven evenly all the way through. The tone control is also designed in a unique way, where the tone circuit is not on the preamp side, but actually part of the phase inverter (power amp) so the gain structure of the amp is unaffected by the tone control. "
Check out this MEF Tiny Terror link: 230 Posts!
http://music-electronics-forum.com/t1477/

[Chuck H]

That thread is a long read. I have followed it somewhat. But it's worth notinggthat since the TT does use the poer tubes effectively as part of thh gain structure (instead of just cascaded preamp stages) that the tone controls really do still affect the the gain though to a lesser degree. I'm only bummed that I didn't do it first since I had the concept on the drawing board a year before the TT circuit came out. But I digress. The gain is still affected by the tone stack because the level of drive of isolated frequencies that drive the final clipping stage of the amp is still affected by the tone stack. BUT... it's worth noting that the affect is minimized by placing the tone controls as late in the circuit as possible. Wish I'd done it instead of waiting and watching it done...