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Old 1st May 2010, 03:27 PM   #491
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Originally Posted by andrewlebon View Post
hi eesbibol
greetings thanks for your thought first hclass trying to get used to
how it works gut feeling will be a great amplifier such a nice feeling to know
so many helpful people around makes me feel good
thanking you
andrew lebon
This is simple amplifier, and there must be simple mistake on your amp, I hope you fix it soon,
Regards
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Old 3rd May 2010, 12:25 AM   #492
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Originally Posted by eesbiboi View Post
ok then...
now, i got the point...
im very sorry for asking too many questions...
im just 21 and im not an electronic engineer...
but i build my own amps for quite sometime...
thank you for the advice sir...
and i hope for more of your advice soon...

here is one of my DIY amps...
are you building h900?
did you manage to get IR2117?
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Old 3rd May 2010, 04:07 AM   #493
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Originally Posted by apexaudio View Post
No if you add more output devices.
APEX
how about adding power trannies?let say 7 pairs
should .33R increase value

Last edited by engel dela pena; 3rd May 2010 at 04:26 AM.
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Old 3rd May 2010, 07:56 AM   #494
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Originally Posted by engel dela pena View Post
are you building h900?
did you manage to get IR2117?
im planning to build b500 like yours...
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Old 3rd May 2010, 08:50 AM   #495
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Quote:
Originally Posted by engel dela pena View Post
APEX
how about adding power trannies?let say 7 pairs
should .33R increase value
I don't want to diyers be afraid with "monster" amplifier useing six or seven pairs of output transistors, I use minimum on small pcb, you can add more outputs on larger pcb if you want. I see many amplifier with simple VAS simpler than my in "100w Ultimate Fidelity Amp" with seven pairs of outputs on large pcb called "monster" that's "fatamorgana" for my opinion.
Regards

Last edited by apexaudio; 3rd May 2010 at 08:57 AM.
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Old 3rd May 2010, 10:55 AM   #496
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Originally Posted by apexaudio View Post
I don't want to diyers be afraid with "monster" amplifier useing six or seven pairs of output transistors, I use minimum on small pcb, you can add more outputs on larger pcb if you want. I see many amplifier with simple VAS simpler than my in "100w Ultimate Fidelity Amp" with seven pairs of outputs on large pcb called "monster" that's "fatamorgana" for my opinion.
Regards
what do you mean by fata morgana?
are you in favor or not to 7 pair output?
in this picture 2 pcb top & bottom share 1 heatsink?
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Old 3rd May 2010, 01:03 PM   #497
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Originally Posted by engel dela pena View Post
what do you mean by fata morgana?
are you in favor or not to 7 pair output?
in this picture 2 pcb top & bottom share 1 heatsink?
I mean, some amplifiers just look like "monster", and for a real are very simple, and not much powerfull as they designers say.
Yes I favor to use 7 pairs, but only on B500 and H900.
Amplifier on picture use 2 pcbs on 1 heatsink with 2 fans, work on 0,+/-55VDC,+/-110VDC, 2500w transformer. Heatsink is about 3kg, and amp can work on 2R load, but this is H1200 amplifier, not H900.
Regards
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Old 3rd May 2010, 01:13 PM   #498
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Originally Posted by apexaudio View Post
I mean, some amplifiers just look like "monster", and for a real are very simple, and not much powerfull as they designers say.
Yes I favor to use 7 pairs, but only on B500 and H900.
Amplifier on picture use 2 pcbs on 1 heatsink with 2 fans, work on 0,+/-55VDC,+/-110VDC, 2500w transformer. Heatsink is about 3kg, and amp can work on 2R load, but this is H1200 amplifier, not H900.
Regards
does your h1200 mean 1200w per module or 600w+600w
h900 450w+450w?
this means that those who knows amp math can upgrade h900 to
h1200?

Last edited by engel dela pena; 3rd May 2010 at 01:19 PM.
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Old 3rd May 2010, 01:33 PM   #499
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Originally Posted by engel dela pena View Post
does your h1200 mean 1200w per module or 600w+600w
h900 450w+450w?
this means that those who knows amp math can upgrade h900 to
h1200?
You can get 1200W per module with MJL outputs.
Diyers with more expirience can easy upgrade H900 with add outputs, but I think no need to get more power, you must have speakers for this power.
Regards
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Old 3rd May 2010, 01:41 PM   #500
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Originally Posted by apexaudio View Post
You can get 1200W per module with MJL outputs.
Diyers with more expirience can easy upgrade H900 with add outputs, but I think no need to get more power, you must have speakers for this power.
Regards
does that mean, adding more output trannies would increase h900's power output up to such 1200w???... ...
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