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Old 16th July 2005, 03:08 AM   #101
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Default Parts position one

Here is the image.

regards,

Carlos
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Old 16th July 2005, 03:09 AM   #102
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Default Parts position two

Here is the image.

regards,

Carlos
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Old 16th July 2005, 03:11 AM   #103
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Default Parts position three

Here is the image.

regards,

Carlos
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Old 16th July 2005, 03:12 AM   #104
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Default Parts position four

Here is the image.

regards,

Carlos
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Old 16th July 2005, 03:29 AM   #105
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Default Here is one idea to make it simple

The image is had some text and may be self instructive.

regards,

Carlos
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Old 16th July 2005, 03:34 AM   #106
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Default Dr. Self?....Grumpf!

No please!...no!...no!...

I turn green alike HULK when i hear his name.

Kidding of course, he is a very good man...but his amplifier, that blameless...well...see the image and you will understand the feeling.

regards,

Carlos
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Old 16th July 2005, 03:48 AM   #107
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Default Attention guys!....Michael Bittner, our MikeB, is working hard, going througth the

night...and asked me to publish Symassym4 and 5 schematic...and all details.

I will do it, openning new thread next wednesday.... as this thread here, this one you are reading, is going to die naturally, as questions already made, and doubts are near to finish.

Symassym is very good too.

In my mind; AKSA, also GEM, also JLH designs, Also Symassym, in different order than wrote above, are very good amplifiers...all them very good...each one with their own proper characterístics... wich one is the best.

Exist others good?

- off course exist many that i never heard, never assemble..but those i can sign under, as they are "State of the Art", each one one precious stone.

Those i constructed them, i tested them, i heard them for long time, i tried to turn better and i failled, they were compared and considered wonderfull..others assembled were nice, reasonable, supportable, tollerable and damn awfull and received a shot.

Of course, many of those failed as a result of my ignorance and incompetence...no doubts..but those four i wrote could beat my ignorance and low competence..they worked, beeing resistant to foolishes, to polarity inversions and produce cristal clear sound.

You Judge!.... all those guys are close friends..i cannot put them to figth...a dog's figth!

I have the pleasure to present you, some antecipation of Symassym...class AB.... 50 watts RMS also and using same voltage as GEM and AKSA...here is the diagram, without values..next week...wait for it please.

Mr. Graham Maynard made the kindness to simulate and compare with GEM, he said specifications was better to GEM...i do not know the percentual difference, and the details...he did not assemble...the ones that assemble was the designer, Michael Bittner, Mr. John Mateus, and I only.

Hugh Dean made his evaluation and told that he apreciated the schematic, and also apreciate the GEM schematic...he is a Lord.

regards,

Carlos
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Old 16th July 2005, 04:01 AM   #108
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Default Thanks Carlos

Thanks for the pictures they will be a lot of help. What about the GEM's stability with an ESL load? Anything to consider there? I ask though I do not have very much experience with electronics construction. There are lots of amps that will drive an ESL but not a lot that sound good with that load. Regards Moray James.
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Old 16th July 2005, 04:20 AM   #109
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Default I have not technical conditions to say yes or no

But a Graham's sentence i can remember.

"One amplifier designed to ESL will be different of another designed to dinamic speakers"

Not only this makes a lot of sense, but seems to me, that he is avoiding his responsabilities for the Boooom!..plaft, póc! that may happen. (he is laughing now)

My feeling, just a feeling.... ESL will explode the amplifier output... ESL, as i could have some informations, are enormous problem to match, despite wonderfull sound...one step advanced related the ridiculous air pumps, that we have been using for more than a century, the speakers...air pumps...yeah!

I had informs, that usually the load is too much low in impedance,or have a transformer producing counter forces to audio signal , and this may create high voltage spikes...those spikes beeing bigger in voltage that the maximum transistor output VCE, made it burn.... maybe some zenner to hold those peaks...i do not know.

In your place.... will not try...but John Mateus, used the last JLH updated schematic, not only updated, also upgraded in components too... a Symetrical JLH last model.... 98 model...or 89 model...cannot remember exactly...and he use a ESL coupled in this class A amplifier without any problem.

Find Jmateus in our forum...and mail to him, he will be glad to talk about that subject.

Let's listen Graham...he may agree...or not...let's listen to him.

regards,

Carlos
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Old 16th July 2005, 04:58 AM   #110
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"Douglas Self is the designer of the Blameless amplifier, blameless because it has very low distortion depite being classB. Don't ask DestroyerX how it sounds, he may kill himeslf."

i dont understand how is it possible to have a low distortion
from a class-b since there's no bias, how did he do it
can you provide a link of the schematic of this amplifier
in the meantime ill try googling to see if i can find anything
thanks for your help

cheers
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