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Old 1st October 2003, 02:51 PM   #1
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Default A-75 parts for sale

Front end boards, double sided. Those are tested boards. Trimpots are placed on the other side. If you mount the boards directly on rear panel and drill appropriate holes, you can adjust the amp, without opening it. It is better this way, as the temp doesn't change. USD $50 per board.
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Old 1st October 2003, 02:52 PM   #2
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Those boards have trimpots monted on the top layer and are using Dale resistors, instead of Holcos. USD $60 for two boards.
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Old 1st October 2003, 02:54 PM   #3
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I also have regulated PS for front end, delivering +/- 50V DC. Those supplies are based on ML23.5 amp. Schematic: http://www.diyaudio.com/forums/showt...3308#post53308
USD $60 per board.
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Old 1st October 2003, 02:57 PM   #4
Stefano is offline Stefano  Italy
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Hi Peter, i'm interested to all the necessary to build the a75, like unreg power supply and output stages
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Old 1st October 2003, 02:57 PM   #5
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Here are custom built 750VA Plitron toroids. They feature double primaries (115V) and 4 sets of secondaries. Main secondaries deliver 40V DC after rectification and another set of secondaries is for front end PS regulators and deliver about 70V DC after rectification and after reg, you are getting required 50V DC. USD $100 per transformer.
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Old 1st October 2003, 03:00 PM   #6
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I have one set of output devices in TO3 cases. 24 x IRF230 and 24 x IRFP9130. I had to take 9 mosfets out of this set to built my Aleph X, but have more of them in another A-75 amp and can remove them and add here. They were not used much. Since those is not currently avaulable parts, I accept offers.
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Old 1st October 2003, 03:02 PM   #7
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I also have set of mounting bars to mount TO-3 devices. They are custom machined and are designed for R-theta heatsinks measuring 11". The bars are 10.5" long to accomodate 1/4" front and rear panels. $30 per bar, sold in sets of 4.
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Old 1st October 2003, 03:04 PM   #8
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R-Theta heatsinks. Measure 11" x 11". 2 of them are good for one channel of A-75 amp or Aleph 2. Sold in sets of 2 or 4. USD $50 per heatsink.
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Old 1st October 2003, 03:04 PM   #9
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Here's the heatsink info
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Old 1st October 2003, 03:06 PM   #10
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Still have capacitors that can be used in building A-75, or other amps
5,600/63V Nichicon caps for sale

4,700/50v ROE caps
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