Dx Troyan, a 650 watts channel amplifier. - Page 29 - diyAudio
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Old 6th October 2010, 08:37 AM   #281
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Quote:
Originally Posted by AndrewT View Post
don't be sorry for not being precise in your selection of components. There is no reason to appologise.

But, be unambiguous when you tell your readers what you recommend.

As you can see "match transistors" means something completely different to different people.
"What you put in is what you will receive at the other end" On one amp I did not bother to closely match devices ... amp worked (well ??), but Re voltages were less than ideal ( 15mv , 18mv ,14mv). On newer amp, just using a DMM selected 16 out of 30 devices that were "close" .. now ALL Re's are 15mv I do not think this made the amp sound better but it might be more reliable in the long term.

Just a consideration when building a high powered amplifier with many paralleled pairs.

Input devices also follow this line of thought. If you can find 2 that are "close" with the DMM you will have a output offset of <10mv BEFORE having to adjust a trimmer. This actually MAY influence the final sound .

OS
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Last edited by ostripper; 6th October 2010 at 08:43 AM.
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Old 6th October 2010, 07:31 PM   #282
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Default I am still playing with the Troyan..now playing with a voltage regulator

Enjoy the video and the picture:

YouTube - Supply, part 3 - Still playing with the regulator

regards,

Carlos
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Old 11th October 2010, 10:08 PM   #283
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Default I have discovered the way to make it sound awsome

Interesting.... a non standard modification that may drive technocrats crazy... well..they will never know..they are not builders.

Now it is playing with astounding, awsome superior sonics.

Will inform only to builders.... to avoid troubles...the modification is really crazy.

aahahahahahah!

regards,

Carlos
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Old 16th October 2010, 04:29 PM   #284
norazmi is offline norazmi  Malaysia
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hi there,

Uncle Charlie can u send me an email for this construction of troyan, schematics, PCB, silk if u have the final one all of these, i would like to build it now. my email xwebmaster at gmail dot com. THIS IS MONSTER AMP!!

Regards.
Azmi.
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Old 16th October 2010, 04:33 PM   #285
norazmi is offline norazmi  Malaysia
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for the power supply, ill use offline smps by LUKA, already made 1 and working good, rails can be adjust by rewind trafo, maybe i can get 1kw of this smps, tested with dx amp before working great ..

Regards.
Azmi.
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Old 16th October 2010, 05:44 PM   #286
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Carlos,
I am not one of the complainers. Please send me all of your modifications. I think I will put this together. I have about 32 nice 100 volt caps and some nice 1kw trannies.
How much welding cable do you think I will need? Joking here.

I also have some 10 nice Rifa 450 volt oil filled caps if anyone is interested. They are real nice. It takes a slew of bridge rectifiers in parallel to charge them.

Tad
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Old 16th October 2010, 06:06 PM   #287
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Default All i know from this amplifier was posted Azmi....i cannot remember details

So, the effort for you to read will be the same effort for me to read.

Please, give a good read into this thread in advance to move... this amplifier is not easy.

I am very busy with the new amplifiers to be released, so, i will be happy if you do some effort to read, avoiding me to read the thread to remember and then go to explain you.... do not make too much sense if you can read by yourself saving from uncle charlie some effort and also saving my time and energies... as i have already spent a lot creating it, simulating it, building it and testing it..not your turn folks.

I am glad about your interest friends, but this amplifier was posted so long time ago that i cannot remember exactly....reason why i have posted all things that happened.... the thread is the memory for us..... alike you dear Norazmi...i will have to read the thread entirely to understand it deeply... as i said...i'm doing other things...i would like to be free to finish the stuff i have to do.

Modifications are easy, two parts to change..so...first build it..then after built i will inform you what parts to remove and change value.... will not inform in advance..no way.

regards,

Carlos
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Last edited by destroyer X; 16th October 2010 at 06:10 PM.
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Old 16th October 2010, 07:17 PM   #288
norazmi is offline norazmi  Malaysia
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Sure Uncle Charlie, im reading on it , take ur time first ill carefully build this one as you mention above, hihihi dont worry be happy uncle Charlie

Regards,
Azmi.
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Old 16th October 2010, 08:52 PM   #289
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Default Adding a Busbar

Carlos,

Congratulations with your new design. I trust that the builders will enjoy this one as much as they did all your previous designs.

I would like to make one recommendation in that you remove the soldermask from the power lines so that the constructor can solder a copper busbar (see attached picture).

I have found this necessary on high power amps laid out this way. as there is a considerable voltage drop across the PCB track from the first to last transistor and you find the first works harder than the last.

Kindest regards

Nico
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Old 16th October 2010, 08:58 PM   #290
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Here is a better view

Nico
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