Series/Parallel Secondary Preferable for Tube OPTs

Series/Parallel Secondary Preferable for Tube OPTs

Since lower impedance speakers are here like them or not (and I
don't) this works best. See the Manila Book for details or the seminal
Williamson Amplifier booklet.

Re: Series/Parallel Secondary Preferable for Tube OPTs



Bratzi said:

> Since lower impedance speakers are here like them or not (and I
> don't)

Another conspiracy by the Jews, no doubt.

Re: Series/Parallel Secondary Preferable for Tube OPTs

On Mar 19, 6:15 pm, George M. Middius <cmndr george @ comcast .
net> wrote:
> Bratzi said:
>
> > Since lower impedance speakers are here like them or not (and I
> > don't)
>
> Another conspiracy by the Jews, no doubt.

Hardly. It's a conspiracy of designers pandering to audiophools.

Re: Series/Parallel Secondary Preferable for Tube OPTs




Bratzi said:

> > > Since lower impedance speakers are here like them or not (and I
> > > don't)
> >
> > Another conspiracy by the Jews, no doubt.
>
> Hardly. It's a conspiracy of designers pandering to audiophools.

Are you positive it's not the Jews? It's exactly what I would do if I were
inclined to take part in conspiracies. That, and undermining the
Krooborg's thriving Internet-based "business", of course.

Re: Series/Parallel Secondary Preferable for Tube OPTs

On Mar 19, 7:21 pm, George M. Middius <cmndr george @ comcast .
net> wrote:
> Bratzi said:
>
> > > > Since lower impedance speakers are here like them or not (and I
> > > > don't)
>
> > > Another conspiracy by the Jews, no doubt.
>
> > Hardly. It's a conspiracy of designers pandering to audiophools.
>
> Are you positive it's not the Jews? It's exactly what I would do if I were
> inclined to take part in conspiracies. That, and undermining the
> Krooborg's thriving Internet-based "business", of course.

Pretty much positive.

Re: Series/Parallel Secondary Preferable for Tube OPTs

Bret Ludwig wrote:
> Since lower impedance speakers are here like them or not (and I
> don't) this works best. See the Manila Book for details or the seminal
> Williamson Amplifier booklet.
>

Could I interest you in some 16 ohm E-V's? Why, or what about is it
you dislike, and what do you prefer?

--


"I wonder how much deeper the ocean would be without sponges?" -- TazAMD

Re: Series/Parallel Secondary Preferable for Tube OPTs



Bret Ludwig wrote:
>
> Since lower impedance speakers are here like them or not (and I
> don't) this works best. See the Manila Book for details or the seminal
> Williamson Amplifier booklet.

Old Williamson amps made with the original OPT
recipe from DTNW himself could be configured for many
load matches.

But many makers had only two sec windings, so you could have 16ohms
with series connection, and 4 ohms for parallel.

The impedance ratio was high for lots of class A originaly, with anose
to anode load being 10k for 2 x KT66
in triode or UL.
But that got adulterated when the power wars started and RLa-a soon
became 5k or lower
to get a higher amount of AB power in UL or tetrode, and forget triode.

So low Z speakers can be used now with old W OPTs, with the 4 ohm match.

Sometimes 8 and 2 ohms were possible, same deal, use the 2 ohm outlet
for low Z speakers.

Patrick Turner.

Re: Series/Parallel Secondary Preferable for Tube OPTs

On Mar 20, 1:50 am, Patrick Turner <i...@turneraudio,com .au> wrote:
> Bret Ludwig wrote:
>
> >  Since lower impedance speakers are here like them or not (and I
> > don't) this works best. See the Manila Book for details or the seminal
> > Williamson Amplifier booklet.
>
> Old Williamson amps made with the original OPT
> recipe from DTNW himself could be configured for many
> load matches.
>
> But many makers had only two sec windings, so you could have 16ohms
> with series connection, and 4 ohms for parallel.
>
> The impedance ratio was high for lots of class A originaly, with anose
> to anode load being 10k for 2 x KT66
> in triode or UL.
> But that got adulterated when the power wars started and RLa-a soon
> became 5k or lower
> to get a higher amount of AB power in UL or tetrode, and forget triode.
>
> So low Z speakers can be used now with old W OPTs, with the 4 ohm match.
>
> Sometimes 8 and 2 ohms were possible, same deal, use the 2 ohm outlet
> for low Z speakers.
>
> Patrick Turner.

hey-Hey!!!,
I'd put more value in using the whole secondary symetrically. Less
turns in there doing nothing the better. My Thordarson T3S16 can go
from 4 to 8 to 16 without leaving anything out of the current loop,
though most can't. I am neglecting its line secondary of course, and
when I make a pair of copies I may yet leave it out...though it would
make an interesting CT screen grid coil( or CFB depending on how much
FB I want).
cheers,
Douglas