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Old 20th October 2005, 12:16 PM   #1151
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Default Re: It's alive!!

Quote:
Originally posted by rabstg

I listened to Lyle Lovett�s "I love Everybody" CD and sat in amazement.

And I can say that after 2 cd's! The tone, pitch and pace were dead on. It was smooth and DETAILED!


Thus far I am absolutely amazed at what is coming out of this inexpensive amp!

Troy,

I know the feeling! I had been biased for a long time that nothing could approach the quality of big dollar big current (but not necessarily big output lol!) Class A amps. Well this amp clearly blows that myth away. After months of critical listening I would choose "My Ref" over my KSA-50 or my Aleph 30SE.

You did an awesome build. Thanks for being a beta tester. It is guys like you who make this fun for me, and thats the whole point really.

Cheers!
Russ
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Old 20th October 2005, 02:51 PM   #1152
troystg is offline troystg  United States
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Default Re: Re: It's alive!!

Quote:
Originally posted by Russ White
Troy,
You did an awesome build. Thanks for being a beta tester.Cheers!
Russ

I will be cleaning up the wiring and layout shortly to make it much "prettier" inside.

Please hurry on the source selector and Kookaburra so I can put those in!

EDIT:

By the way, I can solder pretty well, but for fun and an even better job I had Repute assemble the boards... He did a fabulous job, and I was very happy with the outcome.

If anyone wants a kit built and can't do the soldering required, they can Email Repute and maybe work something out... I am NOT advocating Repute for anything, he is just a long time friend that did PCB rework in a prior lifetime. I would just hate to see someone miss out on this GREAT amp because they can't solder.
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Old 20th October 2005, 03:40 PM   #1153
float is offline float  England
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Well, I can't resist any more.....

This little hussy has been tempting me for a while; I thought I'd probably try a Ucd400 instead but with funds being shorter than ambitions .....

Question to the Pear chaps- can I still get in on the first delivery run of the kit (oct 24th?)

Weeks to make my mind up and now I WANT IT NOW!!
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Old 20th October 2005, 04:09 PM   #1154
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Quote:
Originally posted by float

Question to the Pear chaps- can I still get in on the first delivery run of the kit (oct 24th?)

Weeks to make my mind up and now I WANT IT NOW!!
Absolutely, we have plenty of PCBs which are in stock right now, and can ship now, and kits which should ship by Monday.

Enjoy!

Cheers!
Russ
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Old 20th October 2005, 04:36 PM   #1155
float is offline float  England
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Hi Russ, payment made and I'm rubbing my hands in anticipation

I'm hoping it will stamp all over my current Audiolab.
I'll let you know how I get on. Watch out for smoke on your east horizon
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Old 20th October 2005, 04:44 PM   #1156
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Quote:
Originally posted by float
Watch out for smoke on your east horizon
Hah! I truly hope no smoke appears.

Have fun!

Cheers!
Russ
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Old 20th October 2005, 08:32 PM   #1157
motzu' is offline motzu'  Romania
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Finished my first Gainclone Rev_A

Pictures ( warning, each one, full size - about 800k !!!) at :

ftp://ftp.dallnet.ro/public/hi-fi&stuff/Gainclone/

DIY case, black painted - one 400 VA @ 2x22V toroidal transformer

2x15000 microFarads on each rail - I'm not sure if they're really Rubycon

The list of components sticked to Mauro recomandations.

PCB's made at scale after Mauro's PDF at a local manufacturer.

Speakers are 4 ohms ones. T+A .

First impressions : detailed, powerfull, with a LOT of bass . I mean a LOT !

Maybe that's why a have the impression that, somewhow, highs are little bit less present than with my Yamaha , for instance.

One strange issue - one of the chips is getting a litlle bit warmer than the other one .Sensible warm ! Also the chips are warm if the amp is left alone with the power on but with no input at all.

Otherwise - is extremely quiet . No hum at all, even at maximum.

Mr.Penasa , could you be so kind to advise if and how is possible to connect the actual module in paralell mode. Would they be any implications regarding your concept ?

Regarding the high frequencies .Have I done something wrong or is just my ear ?

Could it be a high frequency oscilattion heating my chips differentelly and also heating the chips even with no signal ? Should I move to Rev_C ?

Thanks for your nice threads, everybody.

Best Regards
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Old 20th October 2005, 09:17 PM   #1158
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Quote:
Originally posted by motzu'
Maybe that's why a have the impression that, somewhow, highs are little bit less present than with my Yamaha , for instance.
Warmer than a Yamaha, impressive.
May I suggest you to try snubberizing those big caps?
You'll get tighter bass, cleaner and more detailed midband and treble.

Sorry guys, I couldn't resist.
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Old 20th October 2005, 09:39 PM   #1159
troystg is offline troystg  United States
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Carlos-

I will try two 2 tweaks to my amp:

1. Op-amp zener change to 18volts from 12
2. your snubbers

The zener is a no brainer, but may I ask you what values to try for the snubber?

I have the stock rev c kit using dedicated 25-0-25 volt transformers.

I can't wait to go home and set up the amp down stairs to listen to over the weekend as I very seldom get to listen upstairs in the tv room.
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Old 20th October 2005, 10:00 PM   #1160
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Quote:
Originally posted by rabstg
...may I ask you what values to try for the snubber?
0.1R + 3.3nF
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