Bridge T Circuit

[Isaac]

In an interview, Conrad refers to the bridge T circuit and how it made their amps sound cleaner, not so muddy.

Does anyone know when this was implemented, and where in the amp(s) it is used? Is this the reason the Model T was called the Model T?

[Isaac]

Anyone?

Beuller?

[loudthud]

The classic FMV tone stack acts a little like a bridged T, basically a deep notch in the midrange. The Model 60 amps with the top controls and Dynaco based preamp used more of a Baxandall tone control. Starting with the 100S/200S amps, then the Concert series, the 1st gen Model T and the Enforcer used the FMV. The Coliseum amps had their own unique tone controls. The Alpha, Beta and some of other solid state amps have unique tone controls that may emulate the bridged T, I'd have to measure one or simulate the circuit to confirm. The 2nd gen Model T has a classical "James" tone network (simiilar in response to Baxandall) with an added mid control as does the Model A.

[Isaac]

Here's the quote from the interview:

VG:  Around 1970 there were the Dymos and the Solos, which I believe
were solidstate.

CS: (Laughs) Yeah, that's true.  I'd forgotten about them.  Somewhere in
that time we started to use the Bridge T circuit on the tube amps.
There was a guy named Raul Longworth - friend of Tenyck's - and he was a
jazz guitarist.  We were sitting in the lab listening to him and some of
the complex chord structures - our original circuit kind of muddied up
and wasn't real clear.  But with this Bridge T circuit, it was much
clearer.

So it seems unlikely to me that he's referring to the classic FMV tone circuits.