Impedance matching anyone

[Adrian Tuddenham]

Joerg <notthisjoergsch@removethispacbell.net> wrote:

Hello Tim,

Did any of them use the ultra-linear connection in the final? That's a
non-obvious form of feedback.

I have not seen a screen grid connection to a tap of the output
transformer in any of them. Probably I didn't get to see the Rolls Royce
class of tube amps in those days.

I would class guitar and your Hammond completly differently than a hi-fi
amp: in the case of of the amp being part of the instrument you can
tailor the whole system to include the speaker response; ...

It is likely that they did that. Although I believe Hammond had the
electronics module designed by an outside contract firm.

"Roger" mentioned on an adjoining thread that with a high-impedance
amplifier output you need to match the speaker to the amplifier. IIRC
the cool early hi-fi speakers (and possibly current, I just listen to
boom boxes) were "low efficiency", presumably with sacrifices made in
the speaker to get better sound. If you're dinking around with the
speakers at the same time you're dinking around with the amplifier it's
hard to tell what changes are affecting what...

I remember my teenage days when it was customary to pack speakers with
bales of damping materials. Then you needed hundreds of watts to drive
them but luckily there was that old cheap work horse, the 2N3055. I did
prefer tubes in those days. More oompf. The meanest tube amp delivered
around 700-800 watts, mostly depending of how much the mains circuit
breaker could stomach. One strong twang on the electric guitar and the
lights went out.

The real freaks built Klipsch horns. But that required access to
precision wood working tools which none of us had.

It is possible to build Klipsch horns without any great degree of
woodworking precision. I use a homemade pair for the LF end of a
battery-portable P.A. setup and they are perfectly serviceable (they
just look a bit rough).

--
~ Adrian Tuddenham ~
(Remove the ".invalid"s and add ".co.uk" to reply)
www.poppyrecords.co.uk