Some people loves a challenge ....

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#42
still4given said:
Hi Gareth,

Is the TGM7 your take on the SKA GB150? Do you have Gerbers to share?

Thanks, Terry
Click to expand...

That's correct, it was derived from the SKA. I haven't decided whether to release the Gerbers. If you want boards, I can help with that - it's not a board design that can be made in the kitchen sink so they need to be obtained from a board house.

Of course, they'll blow Carlos design out of the water. It will destroy the Destroyer. The caped amplifier hero will find his Kryptonit in my TGM7 :mischiev:
 
#43
Carlos and Ostripper: thank you for your contributions! If possible could you please post the .asc files along with any models you've used that are not in the standard LTspice IV library?

I'm not a designer(yet) but i have built a Fetzilla that i'm tweaking.

Thank you!
 
#44
Bigun said:
That's correct, it was derived from the SKA. I haven't decided whether to release the Gerbers. If you want boards, I can help with that - it's not a board design that can be made in the kitchen sink so they need to be obtained from a board house.

Of course, they'll blow Carlos design out of the water. It will destroy the Destroyer. The caped amplifier hero will find his Kryptonit in my TGM7 :mischiev:
Click to expand...

Are you using it in Class A? Sorry, I sort of followed your thread when I was building the SKA but Greg's attitude kind of put me off the design so I just finished up the SKA and lost interest. Now hearing that you got it to work in Class A you have piqued my interest. The major drawback for me is the SMD parts. I struggled with those on the nx amp I built and there are only a handful. Looks like your design used a boatload. Secondly, I have a pretty big collection of through hole parts and almost no SMD so I would have to buy everything. I suppose I need to learn to use them though since the parts houses seem to be phasing out through hole stuff. I will PM you about the boards.

Blessings, Terry
 
#45
destroyer X said:
140 watts of heat is not an easy thing...depending the Fets you gonna use it is better to install more than one pair in parallel to distribute the heat into a larger area from the heatsink.

Supply also must be huge...use capacitance multiplier or use the Dx Supply or you gonna listen a lot of low frequency from the mains.

Please, make recordings, make a video and publish the video.

Take a look in the video into the signature line down here...playing with a monster..this stupid killer can reach 2500 watts with 10 percent distortion and 1800W with 0.005% THD... can go to 1.3 ohm load and accept shorts in the output terminals and also can hold 2.2uf in the output with low impedance resistor and speaker loading.... sadly is just to show..this is exclusive to me..from me to me and to myself.

regards,

Carlos
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Hi Carlos,

I have a couple questions. First, is do you have a board layout for this design? Also, I have a boatload of these MOSFETs, MTW32N20E. It looks like they compare well it the IRFP240. I have been watching for a design that used only N channel because Onsemi didn't make complimentary parts for these. Do you think these will work well in you design? Oh, one more thing, you suggest using extra outputs. Will the single KSA1381 be enough to drive the extra outputs?

Thanks, Terry
 
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#46
Well dear Bigun...i am sorry to let you know...

A fragment of rock exploded from my home planet is now going to be a shield against Kryptonite radiation dear Bigun. 😱

Your TGM7 will be stucked in the mud formed by their capacitor electrolyte that gonna leak as a result of the stoic effort to face the Goliath of amplifiers.. the Glub amp.

Let me know when you give up from that impossible venture, so I can turn off my precious sound machine.🙂

regards,

Carlos
 
#48
Yes Terry..will drive... Fets does not need big current to be driven

I do think it needs just the field effect.

No pcboard available...this is not a traditional diy design, this is a challenge, made mainly to attract these guys that believe they can do better things than others...usually they cannot...some few guys really can match or maybe beat (a very small chance to happen..but the change exist...as anything is impossible).

I am not the main designer... a great leader, a big shot, some extraordinary man from audio electronics have instructed me....he said..do this and do that, calculate this way, calibrate that other way.....a master and his disciple... then it is here....if people want to build, then they should arrange themselves the pcboard layout or ask some skilled pcboard monsters alike Alex mm and other super fast high tech big shots.

I am here just to show the unit and to make extreme provocations to these guys, some of them arrogant, others just a little and others a big fraud as they know nothing about the practice of electronics.

Despite it has a target, an objective to show you and to prove you these targeted guys have not courage, nor know how, nor the will to help others...that they just want to show themselves .... you see...they run away...and hide their empty heads alike the Ostrich does when scared.

Some good guys arrived...the ones loves the sport, as Pavel and Ostripper and Bigun, the Russian big expert...but this was not made with these ones as target...these ones....all them.... proved they are cooperative and have offered designs to the community (the Russian did in Russian language)....the target is the lazy guys that goes buzzing around doing nothing for us ... just bothering and answering questions that where not directed to them... they....who are nosy.

regards,

Carlos
 
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#49
Kris0603... i am sorry

I cannot do that.. instructions from the main designer forced me to be discrete.

Design is not mine...i have just made a small part of it...since the good old days i use to publish things from others...you have many stuff i have made this way...Aksa unit, also Symasym ( symmetrical asymmetrical by MikeB ), also a non switched amplifier and many others.

Mike B is someone that could beat this one...but he is not interested anymore in audio amplifiers.....I am not surprised he has gone away ... a lot of people put themselves to modify the amplifier designed by Mike B, and they have made a big mess on his amplifier... well..this is what i think..what i feel.

regards,

Carlos
 
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#51
still4given said:
Are you using it in Class A? Sorry, I sort of followed your thread when I was building the SKA but Greg's attitude kind of put me off the design so I just finished up the SKA and lost interest. Now hearing that you got it to work in Class A you have piqued my interest. The major drawback for me is the SMD parts. I struggled with those on the nx amp I built and there are only a handful. Looks like your design used a boatload. Secondly, I have a pretty big collection of through hole parts and almost no SMD so I would have to buy everything. I suppose I need to learn to use them though since the parts houses seem to be phasing out through hole stuff. I will PM you about the boards.

Blessings, Terry
Click to expand...

Class A or Class AB is only a factor of bias and hence size of heatsink. I don't use my TGM7 biassed in Class A as they sound so good already in Class AB I see no need to burn the heat. But they will readily operate in Class A - if doing so I would reduce the power rail voltages in order to keep the heat down a little.

Yes, even in Class AB my TGM7 will beat out Carlos' amplifier, it is like David and Goliath. Carlos will not survive the dynamics and smooth delivery of the sling shot from my TGM7 !

Yes, I use a lot of SMD parts, but only for the 2-terminal parts (mostly resistors and diodes) with through-hole for transistors and caps. The small board that results from using SMD helps to maintain stability and performance over a wide open loop and closed loop bandwidth.
 
#56
destroyer X said:
I cannot do that.. instructions from the main designer forced me to be discrete.
Click to expand...

Dx, ok i understand! But the gif you posted is complete, so i could just labor a bit in LTspice and input the schematic as you posted it and start playing?

I get a bit of a Hugh-vibe from the input stage, the input coupling cap biasing for example, he mentions this a lot, and i know you guys are in contact...but i guess many people use that trick.

Intriguing to say the least, when will you build it and tell us all how fantastic it sounds?
 
#57
I just recently connected the front end of my Symasym 5.3 to the OS Slewmaster OPS and it sounds beautiful. Symasym driving 5 pair MJL outputs on 77V rails. Awesome!

Back to this. I'm not looking for PCB, just a parts layout so I don't mess it up.

Blessings, Terry
 
#58
I will not build it...i do trust in this design.

This amplifier is not being offered to people to assemble...it is just presented and i am making the affirmative sentence that it is unbeatable.

I will make a break and keep some distance from the thread and forum.... i do not like the suppositions people is making about this amplifier.... i will wait someone to assemble...too much talk and no one presented themselves to face the challenge.

I said i cannot say the one helped me....or maybe i have helped him...hehehehe..... so, the conversation is taking a course of gossip i do not like.

regards,

Carlos
 
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#59
Dear Terry..... this amplifier from Mike B has my finger on it

I have helped him a lot, not with the design, but with the evaluation..he used to send me high quality recordings and i was pointing him where i could listen a harshing sound..then he implemented modifications before to release to people.

I do think the amplifier he made was very good...i do not like what people made with his design...i do think was a disrespect...and i could listen and no good result to my years.

Several guys tried to make it better...in my point of view the original is better and this is a kind of remind upsets me a lot....well...better to forget.

What happened with Symassym?.... i forgot!

regards,

Carlos
 
#60
I have three now though the last one is more of an experiment with the Slewmonster. The first one is the V5.2 from home etched boards before the board house boards were offered. The second is in a case and gets played from time to time. I use it as a reference amp to test new ones. It's very hard to beat. The new one is a monster. It has retained the Symasym charm but with more power. The Explendit thread was the first time I saw you. It was my all time favorite amp. I'm not sure I have anything today that sounds "better".

Blessings, Terry





 
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