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26th August 2009, 12:02 AM
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#261 | |
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diyAudio Member
Join Date: Jul 2002
Location: Toronto, Canada
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Quote:
__________________
www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC |
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26th August 2009, 06:32 AM
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#262 | |
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diyAudio Member
Join Date: Nov 2006
Location: Near Lyon
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Quote:
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27th August 2009, 08:22 AM
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#263 | |
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diyAudio Member
Join Date: Jun 2006
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Quote:
I would like to mount them 2 on each side of the stereo box |
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27th August 2009, 04:18 PM
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#264 | |
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RIP
Join Date: Oct 2005
Location: Central Florida
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Quote:
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27th August 2009, 06:50 PM
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#265 |
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diyAudio Member
Join Date: Jul 2002
Location: Toronto, Canada
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I tested a single Aleph J channel today and everything works fine.
300VA, 2 x 18V Plitron transformer produces approx 28V unloaded and 26V after connecting to the amp. Loosely matched SJ74 give approX 35mV offset. Next thing will be J-X setup.  
__________________
www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC |
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28th August 2009, 05:27 AM
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#266 |
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diyAudio Member
Join Date: Jul 2002
Location: Toronto, Canada
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I wasn't actually correct, the DC offset was approx 2mV, I forgot about the offset produced by the generator.
The amp runs hot: the 8x8 heatsink with 1.75 fins was way too small for 2 x 18V transformer. For AJ-X configuration, front end components (inside white border) should not be installed. I just removed them from test channel and I'm slowly getting ready for an X
__________________
www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC |
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28th August 2009, 01:20 PM
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#268 |
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diyAudio Member
Join Date: Jul 2002
Location: Toronto, Canada
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The R7 footprint allows two resistor sizes: 500mil and 200mil, depending on the type used.
__________________
www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC |
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28th August 2009, 06:26 PM
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#269 |
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diyAudio Member
Join Date: Oct 2006
Location: Ft. Wayne, IN
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Peter,
What is the size of the thru holes you use for signal, ground, and power wires? I am thinking of getting some turret terminals to facilitate quick solder/desolder for experimenting on mine. Thanks, Tom |
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28th August 2009, 07:01 PM
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#270 |
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diyAudio Member
Join Date: Jul 2002
Location: Toronto, Canada
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Those are approx 1.5mm (0.060")
__________________
www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC |
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Resistor location on board
