reinderspeter
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« on: August 06, 2013, 01:33:18 PM » |
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About 1.5 year ago I asked Graham to build one of his chipamps for me. It works really well, but it also made me eager to build one myself and see how it would compare. Graham's uses the bigger LM3886, I wanted to try the much smaller LM1875 since my Klipsches are very efficient and need very little power to make a lot of noise. Reese kindly provided a few chips to try. To keep cost down I used the power supply from Graham. Another exercise in point to point soldering  A chip, two resistors, two caps. The complete amp   Add a few bits of aluminium and wood    Playing  Having it switched on for a few days now, I have to say it is pretty good  |
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Peter PTP Audio for Lenco based idler drive Turntables, Chipamps and Power Controllers. |
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autobayer
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« Reply #1 on: August 06, 2013, 01:59:42 PM » |
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rfgumby
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« Reply #2 on: August 06, 2013, 03:53:22 PM » |
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That's awesome Peter!
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Scott
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sachu888
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« Reply #3 on: August 06, 2013, 04:07:45 PM » |
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Very nice set up.
Regards,
Sachin
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ropie
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« Reply #4 on: August 06, 2013, 04:16:59 PM » |
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Beautifully neat and simple! Must get started on mine  |
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dubai2000
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« Reply #5 on: August 06, 2013, 10:56:16 PM » |
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Now that's what I call a simple amp......I admit I am getting curious  . Peter, would you care to write more about its 'sound' - perhaps in comparison to other amps? |
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Cheers,
Wolfram
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bluemike
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« Reply #6 on: August 07, 2013, 01:19:53 AM » |
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Mr R you are a genius |
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Pat
Audiophilia at it's finest !
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ecosprog
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« Reply #7 on: August 07, 2013, 09:28:22 AM » |
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So, you finally got around to building it.  You might want to try playing around with the power supply. It makes a big difference sometimes depending on the speakers. It´s not a straight forward thing and involves both voltage and size. I found an 18V/200+VA transformer worked best for my setup. But hey, we can talk about this next week. |
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reinderspeter
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« Reply #8 on: August 07, 2013, 01:02:07 PM » |
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Now that's what I call a simple amp......I admit I am getting curious . Peter, would you care to write more about its 'sound' - perhaps in comparison to other amps? Not much to say, really. It is neutral and alive. The LM3886 I have can sound a bit dry, this one seems better in that respect. |
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Peter PTP Audio for Lenco based idler drive Turntables, Chipamps and Power Controllers. |
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williamsunique
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« Reply #9 on: August 07, 2013, 02:20:36 PM » |
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Try connecting each amp directly to your speakers, ie: no speaker leads.
Paul.
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autobayer
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« Reply #10 on: August 07, 2013, 02:28:54 PM » |
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Hi Paul.
Only in theory - because you may probably need long interconnects to your pre etc...
So you win, you lose.
Cheers
Chris
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mred
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« Reply #11 on: August 07, 2013, 06:53:00 PM » |
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Sure makes all the work in a tube amp look kinda silly  Cool stuff Peter |
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Hello my name is Ed and I have a thermionic addiction
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dubai2000
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« Reply #12 on: August 08, 2013, 11:17:10 PM » |
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Indeed....the simplicity is stunning.....  Is there any chance of getting the schematic of your version? |
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Cheers,
Wolfram
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williamsunique
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« Reply #13 on: August 09, 2013, 09:30:53 AM » |
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dubai2000
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« Reply #14 on: August 10, 2013, 12:44:17 AM » |
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Hi Paul, thanks for the link . |
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Cheers,
Wolfram
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