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Old 28th December 2002, 12:16 AM   #21
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these are mine gainclones. In the picture is one channel three GC for quadriamp system. Thorsten schematic except input cap 0.1 mF because I use them for multiamp from 300 Hz up. Dc offset variyng from 0.8mV to 2.2mV.
I made them with the cheapest component I could find(except transformer) just to see potential.
They work great maybe I 'll go for selected component.
Peter as all your amp those are great too.
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Old 28th December 2002, 12:17 AM   #22
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hoops only one picture this is the other.
Giorgio
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Old 28th December 2002, 11:40 PM   #23
Noam is offline Noam  Canada
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Beautiful job on the Gainclone, Peter.

I have a novice question on acrylic: I'm planning to drill chambers in my Teres platter and fill them with leadshot/plumber's goop mix. Any advice or watchouts? I've never drilled into acrylic, I just want to be sure I don't crack it or something. I think I'll do eight chambers of around 1" diameter and 1.5-2.0" depth. The other concern is boring the same depth on all the chambers, so the platter doesn't end up unbalanced.

cheers
Noam
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Old 29th December 2002, 12:23 AM   #24
fezz is offline fezz  United Kingdom
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is the volume control nessessary?

the pre amplifer usally controls sound so why are you including a volume control in this as well? does it perform worse when running at full power (volume) and will there be any problems if i delete the volume control from the circuit?
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Old 29th December 2002, 01:13 AM   #25
Dave is offline Dave  New Zealand
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Peter,

The big question - How does it compare to your other amplifiers? A75? Alephs?
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Old 29th December 2002, 08:27 AM   #26
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Quote:
Originally posted by Noam
Beautiful job on the Gainclone, Peter.

I have a novice question on acrylic: I'm planning to drill chambers in my Teres platter and fill them with leadshot/plumber's goop mix. Any advice or watchouts? I've never drilled into acrylic, I just want to be sure I don't crack it or something. I think I'll do eight chambers of around 1" diameter and 1.5-2.0" depth. The other concern is boring the same depth on all the chambers, so the platter doesn't end up unbalanced.

cheers
Noam
If you use drill press the depth can be easily adjusted. If using a hand drill, you have to use block of wood to control depth. Use the lowest speed and you'll be fine. Be carefull when drill gets hot, if you stop and don't remove it in time, it may get stuck.
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Old 29th December 2002, 08:31 AM   #27
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Quote:
Originally posted by fezz
is the volume control nessessary?

the pre amplifer usally controls sound so why are you including a volume control in this as well? does it perform worse when running at full power (volume) and will there be any problems if i delete the volume control from the circuit?
I used the volume because this way I don't need a preamp. If you plan to use preamp, you don't need volume in the amp. Unless your preamp has caps at the output, I recommend using them to couple the amp's input.
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Old 29th December 2002, 08:40 AM   #28
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Quote:
Originally posted by Dave
Peter,

The big question - How does it compare to your other amplifiers? A75? Alephs?
To answer this questions, I'll use a comparison that Nelson likes to use.

All those amps sound fine and the differences are like comparing different wines. A75 is more crisp sounding comparing to Alephs, Alephs are more refined and laid back. Aleph X seems to be perfect in every department, and gainclone is like a new kid on a block, trying to impress everybody. How good it really is, time can only tell, but from what I've heard so far, his future looks very promising.

I had all three amps (except AlephX) lent to a friend, who is quite into tube equipment, and he is impressed the most by my gainclone. Considering the parts and efforts needed to build one, you can't really pass an opportunity like that.

What characterises this amp is liveliness and intimacy with which it reproduces the music. The highs are pretty good (lacking maybe only the top end microresolution, but again this amp needs at least 3 weeks break in period), midrange is very good and the bass is surprising. Soundstage is nothing to complain about and you can listen to the amp for hours without getting tired. Please note that I used almost the best parts available and made it a very sound structure, plus few tricks to damp vibrations in capacitors and make a signal path very short. Built different way it may sound not the same. And I'm talking here about this gainclone: http://www.diyaudio.com/forums/showt...671#post100671
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Old 29th December 2002, 12:13 PM   #29
joensd is offline joensd  Germany
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Whoa!
That´s really not just another gainclone.
What can I say?
Thanks once more for inspiring chassis construction.
And here´s one big, "chaotic" gainclone for comparison.

Jens
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Old 29th December 2002, 01:44 PM   #30
mlloyd1 is offline mlloyd1  United States
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Default Re: This is not just another gainclone

D@^^^^it Peter;
we hate your guts

... fantastic!

Quote:
Originally posted by Peter Daniel
I probably went a little overboard with this one, .........
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