Hi,
Circuit base on the gaincone, but without the volume....
And the gain is lower than the suggestion circuit.
The Power supply cap using a pair of the 4700uf
working voltage at +/-35V
Using the 470uf for the by-bass
Resistance using with the RMG Japan...
Sound looks great, still running-in!
Circuit base on the gaincone, but without the volume....
And the gain is lower than the suggestion circuit.
The Power supply cap using a pair of the 4700uf
working voltage at +/-35V
Using the 470uf for the by-bass
Resistance using with the RMG Japan...
Sound looks great, still running-in!
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
Hi, Good work, they look great
I've always wondered, those amps have 2 channels, they are 30 watts on 8 ohm each i think, can you bridge them?
to make like 60 watts on 8 ohm? Because I have like 5 lm3875 and i wanted to do something out of them.
I've always wondered, those amps have 2 channels, they are 30 watts on 8 ohm each i think, can you bridge them?
to make like 60 watts on 8 ohm? Because I have like 5 lm3875 and i wanted to do something out of them.
Those are probably the smallest monoblocks I have seen.
I wonder, however, do those boxes really provide sufficient
cooling or are you running the chips on rather low supply voltage?
I wonder, however, do those boxes really provide sufficient
cooling or are you running the chips on rather low supply voltage?
looks very nice
cool thing with the small boxes. There isn't any coolers it doesn't get to hot??
/Patrik
cool thing with the small boxes. There isn't any coolers it doesn't get to hot??
/Patrik
Its true that these generate alot of heat, and I bet those monolocks get hot.. But I'm sure that unless excessive hours of listening at max volume its not dangerous for the LM's.
hatasa - real good DIY Audio!
hatasa,
this amplifier DOES NOT fit in,
in the "UGLY amplifier" thread.
I like your work very much.
I do not think there is any worrying for too much HEAT.
When listening to music in a normal way
not much cooling is needed.
And I am sure LM3875 can take a lot.
Of course Capacitors can suffer from heat.
That is why I never put them TOO CLOSE to big heatsinks.
/halo - wants to buy hatasa amps ... 🙂
hatasa,
this amplifier DOES NOT fit in,
in the "UGLY amplifier" thread.
I like your work very much.
I do not think there is any worrying for too much HEAT.
When listening to music in a normal way
not much cooling is needed.
And I am sure LM3875 can take a lot.
Of course Capacitors can suffer from heat.
That is why I never put them TOO CLOSE to big heatsinks.
/halo - wants to buy hatasa amps ... 🙂
Attachments
gosh... that was bad sorry, I got mixed up with some other amplifier with similar a name ... My bad..
lm3875 are 56w into 8 ohm.... with a 100w peak.
bah.....
(no, I'm not drunk)
I'm at school, working on lab, just tought I'd take a pause to see whats up on diyaudio..
The only thing I would change is the Black Gates.hatasa said:
In my Opinion just a waste of money. 🙄 🙄
And ordinary Resistors are absolutely good enough
for any circuit.
/halo - have a little less money, than others
and manage just as good anyway
ok call me an idiot, but i've been wanting to do a gainclone amp for a while (not the reason i'm an idiot 😉 ) i only say that because i havent been able to find any schematics, so here i am asking. i'll probably be using lm3886t chips. so post a schematic for my simple mind. thanks
-Eric
-Eric
Re: Re: My LM3875 Poweramp
Hi!
/nice statement, I could include that one as well as my catchy line...
Instead of BG I take Panasonic FC, not that cheap, either, but compared to BG...
The only part I make no compromises are the PSU caps... BHC SlitFoil all the way (if capacitance exceeds 5000 uF, else I also take paralleled Pana FC)...
Still I keep spending too much money on audio electronics which I never use after they are finished...
Nice Weekend!
Arndt
Hi!
halojoy said:/halo - have a little less money, than others
and manage just as good anyway
/nice statement, I could include that one as well as my catchy line...
Instead of BG I take Panasonic FC, not that cheap, either, but compared to BG...
The only part I make no compromises are the PSU caps... BHC SlitFoil all the way (if capacitance exceeds 5000 uF, else I also take paralleled Pana FC)...
Still I keep spending too much money on audio electronics which I never use after they are finished...
Nice Weekend!
Arndt
saletel said:
I built this one:
An externally hosted image should be here but it was not working when we last tested it.
Resulting in:
An externally hosted image should be here but it was not working when we last tested it.
Internals:
An externally hosted image should be here but it was not working when we last tested it.
Rest of story and links on http://www.euronet.nl/~mgw/diy/uk_index.html GeenKloon project.
regards,
Maarten
Glad I read throw this post..Copy a schematic or two and checked my IC drawer and behold 1 LM3875. Junked a old mike amp for it's box and 2 hours later have a good looking single channel "Gainclone". Fired up with now problems and sounds pretty damn good. Didn't have anything other than a Spague 2.2 cap for the input but should do fine I'll hope. I'll look at it though the scope when I get a good tone generator, the one I use for R.F. amps is not to pretty.
Now I might just make a pair for my work room. I think for the size and ease to make that it sounds real good. Nice project...
Now to find a larger box or two that match.
Now I might just make a pair for my work room. I think for the size and ease to make that it sounds real good. Nice project...
Now to find a larger box or two that match.
Halo, just try BG once and you'll talk a different story. Keep your open mind and experiment first and criticise afterwards. You won't for sure, I can tell you that.
What's the point anyway of changing them when they are already built in ?? A real waste of money...
Jean-Paul
The only thing I would change is Black Gates too, but to non polar type N. They supposed to be twice as good as standard ones and 3 times more expensive.😉
hatasa said:
How does the sound compare to the Audio Research on the lower shelf? 😉
Lovely rendering of the Gainclone by the way!
I think they would look better one stacked on top of the other... lol,.. 🙄 I think its time I did something. . 🙂
Hi all,
Happy to got many feedback for the job.... 😉
Today I tried to operate the amp from 9am to 6pm. With the normal volume, ofcoz there are the room with the air condition.... The room temp. around 21c to 24c. I found that the case usually stand around 45-50c there! It looks quite stable....
I using the Redrose Rosebud Speaker
Preamp using with the Clone Marantz Model 7 tube line stage (And I dont think it matching well with the gainclone..... I building the new opamp preamp for the gaincone)
Source using the modified Pioneer DV-733A (US version should be Eilte DV47), with the LCaudio Zapfilter and the M2XO-1ppm clock module which using TCXO from the new company called MOD2.)
Will update more info on Monday..... bigeyes:
PS: Ah! Yes! Another amp which you saw on the photo is the AudioResearch Classic 30 Poweramp!🙂 :
Happy to got many feedback for the job.... 😉
Today I tried to operate the amp from 9am to 6pm. With the normal volume, ofcoz there are the room with the air condition.... The room temp. around 21c to 24c. I found that the case usually stand around 45-50c there! It looks quite stable....
I using the Redrose Rosebud Speaker
Preamp using with the Clone Marantz Model 7 tube line stage (And I dont think it matching well with the gainclone..... I building the new opamp preamp for the gaincone)
Source using the modified Pioneer DV-733A (US version should be Eilte DV47), with the LCaudio Zapfilter and the M2XO-1ppm clock module which using TCXO from the new company called MOD2.)
Will update more info on Monday..... bigeyes:
PS: Ah! Yes! Another amp which you saw on the photo is the AudioResearch Classic 30 Poweramp!🙂 :
Does any one have any objections if I split this discussion off into another thread?
The subject has drifted slightly off topic😉
The new thread is here:
http://www.diyaudio.com/forums/showthread.php?s=&threadid=11099
The subject has drifted slightly off topic😉
The new thread is here:
http://www.diyaudio.com/forums/showthread.php?s=&threadid=11099
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