I found the following:
Nemesis: http://www.bonavolta.ch/hobby/en/audio/2sk135se.htm
Nemesis PP http://www.bonavolta.ch/hobby/en/audio/2sk135pp.htm
Zeus: http://www.susan-parker.co.uk/zeus-se-amp.htm
Are there more?
I'm looking for diy, of course, and maybe schematics of commercial amps.
Rüdiger
Nemesis: http://www.bonavolta.ch/hobby/en/audio/2sk135se.htm
Nemesis PP http://www.bonavolta.ch/hobby/en/audio/2sk135pp.htm
Zeus: http://www.susan-parker.co.uk/zeus-se-amp.htm
Are there more?
I'm looking for diy, of course, and maybe schematics of commercial amps.
Rüdiger
Hi SunRa,
to my knowledge, the ZV7 works with kind of an 'Anode'-Choke so the output is not galvanically isolated. Do you know of a tweak?
Rüdiger
to my knowledge, the ZV7 works with kind of an 'Anode'-Choke so the output is not galvanically isolated. Do you know of a tweak?
Rüdiger
Onvinyl said:
Add an extra winding and you've got a transformer with isolation. The autoformer should give wider frequency response because you don't have to couple to the extra winding, though I don't know if the difference would be audible in all cases. The transfomer will give you isolation, so you won't fry speakers if your amp fries something.
Sheldon
Altec 1594A rack mount mono sound reinforcement amp. Uses four 2N3055`s in PPP for 100 watts RMS out. Real output xfmer. 4-8-16 and 70V output taps. Uses two 2N3055 as drivers.
The earliest Armstong the 400 series and the later 500 series
did not! feature an output transformer, but were a capacitor coupled amp that had no complimentary pairs at all in the power amp section . The first time i saw this was in an early HK
the Later 600 series was a conventional quasie output
There is no Armstrong with either a driver or output transformer
Rodgers did a series with driver transformers but no output
I have all these models in my amp collection !I feel I am 100% on this
regards Trev
did not! feature an output transformer, but were a capacitor coupled amp that had no complimentary pairs at all in the power amp section . The first time i saw this was in an early HK
the Later 600 series was a conventional quasie output
There is no Armstrong with either a driver or output transformer
Rodgers did a series with driver transformers but no output
I have all these models in my amp collection !I feel I am 100% on this
regards Trev
I ran across an early Electra that had output transformers... a very nice sounding amp, particularily when you consider its vintage.
Even new McIntosh amps have OPTs
dave
Even new McIntosh amps have OPTs
dave
And those transformers have a very interesting technology to produce them
Alternate primary and secondary windings, special core shape, special size and magnetic metal.
Those things were developed in the sixties, and now a day beeing used by some good brands.
Those transformers are expensive and are not "that" guilty related the sound quality as i was thinking last year.
I could listen some and really have not that "transformer" sonic.
The most common problem..the loss in deep low bass is not more the problem with transformers.
regards.
Carlos
Alternate primary and secondary windings, special core shape, special size and magnetic metal.
Those things were developed in the sixties, and now a day beeing used by some good brands.
Those transformers are expensive and are not "that" guilty related the sound quality as i was thinking last year.
I could listen some and really have not that "transformer" sonic.
The most common problem..the loss in deep low bass is not more the problem with transformers.
regards.
Carlos
output trans amps-
I've a dukane model 1a921c P.A. amp which utilizes 14 3055 transistors... rated at 200 watts. It's VERY heavy.
I've a dukane model 1a921c P.A. amp which utilizes 14 3055 transistors... rated at 200 watts. It's VERY heavy.
Talking about solid state amp with OPT,McIntosh is the big name here.But what they using are actually'autoformer'.
de Paravicini designs.
I've asked Santa for a Mac MC2500, 600 watts from a mere 8 output devices.
Why waste another winding when your amp already weighs more than you can lift.
(Plitron should still carry a SS output transformer designed by the master of toroid disaster)
I've asked Santa for a Mac MC2500, 600 watts from a mere 8 output devices.
Why waste another winding when your amp already weighs more than you can lift.
(Plitron should still carry a SS output transformer designed by the master of toroid disaster)
Hi Latala,
thanks for the correction.
I bow to your superior knowledge.
Sorry, to the rest of you for my misleading information.
thanks for the correction.
I bow to your superior knowledge.
Sorry, to the rest of you for my misleading information.
planet10 said:
Menno no like feedback! Very bad thing to him and he is hard core set against it. I have one of his designs here in pieces. Don't know when I'll ever get it together. I'll put a loop on it just to spite him? 😀
Shawn.
Hi,
auto former is a type of transformer.
The primary is connected to the secondary.
It saves a lot of wire and weight and cost compared to a similar power (VA), isolated transformer.
An example use for an autoformer would be converting 110Vac to 220Vac to run imported gear on the higher voltage or vice versa.
The output of the mains connected autoformer is still connected to the mains and similar precautions are needed for it's safe use.
auto former is a type of transformer.
The primary is connected to the secondary.
It saves a lot of wire and weight and cost compared to a similar power (VA), isolated transformer.
An example use for an autoformer would be converting 110Vac to 220Vac to run imported gear on the higher voltage or vice versa.
The output of the mains connected autoformer is still connected to the mains and similar precautions are needed for it's safe use.
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