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17th May 2005, 11:25 PM
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#1 |
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diyAudio Member
Join Date: Sep 2002
Location: Slovenia
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GainConcept No.5
In last months I've been quite GainBuildingMan ...
This is the last of them for now - 5th in the row to be exact - each of them different - from the first with LM1875 (the only to be not so sucesfull), followed with LM3886 "Patek", then experimenting by OPA541/OPA2604 combination (which shows a lot of potential but it still needs a proper chassis), then one with LM1875/NE5532 combination - just to improve bad taste from first attempt - it suceded  - and recently a friend of mine supplied me with a pair of OPA541 and OPA627 and some other parts (2 trannies, chassis, etc) - so I decided to fiddle a bit - and so GainConcept No.5 was born Not yet tested on my main speakers - but so far it sounds very promising ... It has +/-30V on chip rails and total gain around 33, 10k log 12 step attenuator, etc ... |
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17th May 2005, 11:32 PM
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#6 | |
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Banned
Join Date: Apr 2002
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Re: GainConcept No.5
Quote:
NEVER EVER test your first powered up amplifier on your main speakers I always use a cheap or free driver : O ) and run it for several hours. Ive seen speakers on tested first build amps. They don't smell to well either. |
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17th May 2005, 11:36 PM
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#8 |
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diyAudio Member
Join Date: Sep 2002
Location: Slovenia
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@jleaman - yep - as said - he doesn't deserve yet to get connected with main amin speakers - for first few hours he had to be satisfied with some old car units ...
Now it's feeding some old Samsung speakers ... And in the morning - if everything OK - it will be tested on my main system ... |
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18th May 2005, 12:31 AM
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#10 |
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diyAudio Member
Join Date: Dec 2004
Location: Lisboa
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It looks really nice
 good job  In my opinion you should not use in the output those thin cables. I think there is no point in having thick speaker cables if the output in the amplifier doesn’t have nice cables(inside). For testing you can use that ones but once you have finish the amp you should consider change the cables for something better. It’s just my opinion and tip. Ps: I use speaker cable. 2x1,5mm oxygen free for each “banana output”
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