Gainclone HUM, THUMP problems - The solution

[Sparky OR]

Not exactly an enticing prospect for one who seems to be in the beginning stages of DIY eletronics...my 2p worth. Gainclones offer a way for a budding DIYer to make something for themself without having to understand all aspects of it, including PCB layout and construction, RF issues, biasing, etc.

[lanchile07]

Well,0,125% tolerance resistors does not mean nothing to me.
as you can see they use ONE big cap 15000uf per channel...
it would be better if the use small ones like 3.300uf x5 or 2.200uf x7 per channel.but hey they are using 0.0000000001% tolerance parts right?.so it must be the best amp ever .lol...
Maybe you like the sound of this amp ,but for other people is not the sound they are looking for.
I am not saying gainclones amps are the best,but they can put a fight with some of the good commercial amps out there for sure...

[ratza]

Originally posted by lanchile07

as you can see they use ONE big cap 15000uf per channel...
it would be better if the use small ones like 3.300uf x5 or 2.200uf x7 per channel.but hey they are using 0.0000000001% tolerance parts right?.so it must be the best amp ever .lol...

It depends very much on the capacitor. There are industrial capacitors with huge charge/discharge currents, say around 30...50A. I rather put some of these inside instead of using many smaller ones. Anyway, aurche, there is no "best amplifier", just amplifiers which either suites your expectations or not. If you like the sound, then it's fine, don't expect everybody to agree with your choice.

[aurche]

The toroid is 900W, the cap has a diameter of about 5". Do you think it isn't enough? The sound is better than the sound from the most perfectly built gainclone. If you want better sound, gainclone is a lost cause...
The amp was made by an russian millitary factory that was obligated to make a public production. There were no more than 2000 amps made. The trasistors put in the amp are matched by their parameters and the same transistors were put into the tactical missiles of russia. Do you think the russians will put lousy transistor and parts into the missile that is destined to hit America?

[AndriyOL]

Originally posted by aurche
I want you to find millitary quality transistors, 0,125% tolerance resistors, build this circuit and say what is better this or gay clone of what sort you like.
Here is the schematic.

Maybe I need some kind of factory production equipment to build the amp you propose?
What are the technical parameters of this amp?

Regards,
AndriyOL.

[Sparky OR]

way off topic!!

[aurche]

50W of power over what load you can find(4, 8, 16 ....). 2 channels. Protection for everithing you might do with the amp. The PCB is super complicated, but i have ot on paper, so i can scan it. You don't need any equipment different from a soldering iron. You will need a hefty load of transistors to match them.

[pacificblue]

Originally posted by Sparky OR
way off topic!!

Exactly! That amp belongs into the thread UGLY Looking Amp! - but good working

On the other hand it doesn't even seem to fall into the DIY category.

[lineup]

Originally posted by chylld
PROBLEM SOLVED!!!!!!11
after a whole day's work i am glad to contribute the following solution to gainclone hum.
i can now put my ear literally within ear-hair's distance away from the speaker and i cannot hear ANYTHING. (unless i'm playing music of course!)
http://temp.jw.id.au/gcchibi1.jpg
http://temp.jw.id.au/gcchibi2.jpg
http://temp.jw.id.au/gcchibi3.jpg
i assume the pictures are self-explanatory. the transformer box (i call it "chibi") sits on the floor about 3 feet underneath the amp.
can i just say: transformers suck.

i can now put my ear literally within ear-hair's distance away from the speaker and
i cannot hear ANYTHING.
(unless i'm playing music of course!)

You can not hear ANYTHING with amplifier on.
Great!
Now, do not ruin this by playing some noisy humming modern stinking rap music


transformers suck

well, why do you use them?
At least they have to do some thing right ... or


regars lineup