(just or not just, but) Another gainclone page - diyAudio
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Old 26th April 2003, 07:27 PM   #1
Pedja is offline Pedja  Serbia
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Default (just or not just, but) Another gainclone page

I have launched my own site. Gainclone page is here.

Pedja
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Old 26th April 2003, 07:38 PM   #2
elizard is offline elizard  Canada
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wow .. that's beautiful looking!!!

very interesting design imo
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Old 26th April 2003, 08:02 PM   #3
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doh, "this geocities site has exceeded its allocated bandwidth"

all the gainclone fans rushed over there!
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Old 26th April 2003, 09:30 PM   #4
Pedja is offline Pedja  Serbia
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Thanks elizard.

As about the site, it seems it works again...

Pedja
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Old 28th April 2003, 02:27 AM   #5
digi01 is offline digi01  China
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Very beautiful! !
But I can't view you site
Can you compress some and give me a mail?
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Old 28th April 2003, 03:56 AM   #6
Philo is offline Philo  United States
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Alright, Pedja! I am a real sucker for a nice intergrated amp. Way to think outside the "box". Tell your friend "nice case" for me. I hope you solve the heat problem.
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"If you didn't make it with your own two hands, its not really yours".
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Old 28th April 2003, 03:06 PM   #7
Pedja is offline Pedja  Serbia
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Thanks all.

Digi01, I’ll send you, not a problem, just drop me an e-mail with your address, attachments are not feasible in diyAudio mails.

Philo, considering the dimensions of the heatsink it is not strange that it heats too much. Without the hood it is still quite acceptable though. Additional heatsinks saved from the old processor will go left and right at the current heatsink. Holes will be made at the bottom and the back of the case. Should be enough. Btw, that second amp which has whole 2mm aluminum case almost can not get even warm, no matter how long or how loud it works.

Pedja
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Old 29th April 2003, 01:46 AM   #8
digi01 is offline digi01  China
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Thank you Pedja.

My mail is zanghb@bjtzh.gov.cn.

cheers!
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Old 29th April 2003, 03:35 AM   #9
digi01 is offline digi01  China
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Thank you Pedja,I have received the present
Your gainclone is very beautiful, especially the inside overall arrangement, inspire greatly for me.
I have two LM3886, plan to start own gainclone.


Cheers!
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Old 1st May 2003, 05:51 PM   #10
Pedja is offline Pedja  Serbia
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Joe Rasmussen was right…

It is indeed important to have some kind of low pass filtering at the chip itself. Last night I tried it with my ‘clone’s JFET input buffer. I will update the content of my gainclone page with it this weekend. For now, this schematic shows what I have at this moment. I usually practice to take a step back to check what I really have made, and will do the same now also, but this sounds like I have got a missing point about that buffer. Filter rolls-off at 20kHz 0.09dB and phase shift is 10° (matches to the “magic” -3dB at 130kHz rule). These values are derived by simulation and are confirmed by measurement (everything happened last night). FET is hooked to 15V and sourced by some 14mA. I intend to exclude R1, just need some time to determine the FETs output impedance (simulator shows some 25Ohms, if so, then C1=47nF will respond to this).

Pedja
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