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Old 28th April 2013, 10:39 PM   #2931
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[IMG]Click the image to open in full size.[/IMG]

And the rear panel of the Preamp. Not labelled up as yet,
I will put some more pics up of some of the build in progress.
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Old 28th April 2013, 10:45 PM   #2932
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[IMG]Click the image to open in full size.[/IMG]

The pre/power amps with crossover all connected up.
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Old 28th April 2013, 10:49 PM   #2933
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[IMG]Click the image to open in full size.[/IMG]

With the front panel off. The 2 Diy power amps are IRF9240 and IRF240 from memory. Actually they really deliver and are advertised as being 200w per PCB. not sure if that's true or not but they sound excellent.
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Old 28th April 2013, 10:56 PM   #2934
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[IMG]Click the image to open in full size.[/IMG]

Inside one of the power amps this picture shows it before I sanded and sprayed the front panel gold.

Uses super stable Hitachi 2SK / 2SJ mosfets. 300w per channel into 8 ohms without breaking a sweat. Plenty of power with x2 500va toroids and 100volt 80000uf caps. lovely.
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Old 28th April 2013, 11:00 PM   #2935
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[IMG]Click the image to open in full size.[/IMG]

Just for fun, an old system I had years ago.
Tri-amped and sounded great at louder listening levels but when listening at low levels there was a lot of fan noise and hiss through the highly processed signal.

Did sound nice and looked great all lit up!
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Old 28th April 2013, 11:05 PM   #2936
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[IMG]Click the image to open in full size.[/IMG]

Sony CDP-911E
Very nice cd player with ALPS motorised volume on one set of pre-outs. nice touch.
NE5532 op amps, same as my pre-amp. I feel a good combination as I love the sharp crisp treble and tight bottem end these op-amps are renowned for.
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Old 28th April 2013, 11:09 PM   #2937
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Click the image to open in full size.

Top off a Sony CDP-911E cd player I just got off ebay for 60.

Not much to look at but I see the chance to upgrade caps for new fresh ones and possibly try some different op amps on it after fitting DIP sockets.



Perfect front panel and very nice sounding. Great that it has all those direct access buttons and super fast search for those long tracks that are recorded live etc.
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Old 29th April 2013, 07:41 AM   #2938
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Pictures look skew-wiff but when you click to enlarge they look normal again. Im new to uploading pictures in this manner but will get there in the end!
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Old 29th April 2013, 07:50 AM   #2939
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Quote:
Originally Posted by hansonhols View Post

Inside one of the power amps this picture shows it before I sanded and sprayed the front panel gold.

Uses super stable Hitachi 2SK / 2SJ mosfets. 300w per channel into 8 ohms without breaking a sweat. Plenty of power with x2 500va toroids and 100volt 80000uf caps. lovely.
This is a DNA600 but its actually made by BK electronics. Recognise those power amp PCBs?
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Old 30th April 2013, 03:48 PM   #2940
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Line and headphones amp I designed and built. More info here: Current conveyor as a voltage amplifier
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