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Old 21st May 2009, 11:16 AM   #1091
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VLSI, if you have not found another resource on X-Y caps look here:
http://www.justradios.com/safetytips.html
When I restore old radios I add a 3 wire cord and a X-Y cap.
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Old 23rd May 2009, 03:03 PM   #1092
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Hi Guys!

Jumping in here into the current discussion with my recent finished project, a gainclone with integrated usb-dac and remotable volume control. This unit works and plays absolutely great! A bit more about the sound after a proper break-in period...

A brief description:

Amps: AudioSector GainClone LM3875 Basic Kit
DAC: AudioSector USB-DAC with TDA1543
Transformers: Thel Audio, fully encapsulated
(for DAC part: 50VA, 2x9V, with additional windings of 2x3V, connected to 1x6V for powering the Alps remote control unit to drive the motor pot; for amp part: 250VA, 2x24V.)
Remote Control Unit: Alps IRFB4 (with additional small pcb on top to rectify AC from trans to DC)
Volume Pot: Alps blue pot, motorized, 50kohm log
Chassis: Galaxy 1GX388 from Autocostruire, Italy

The unit has two power switches to power on DAC section and AMP section separately, so there is no on/off switching noise when the dac part is powered on prior to the amp part. Further more the dac part could always be switched on for best performance, even if the amp part has to be switched off for any reason (e.g. trying out some new speaker cables).

This is a no-compromise-solution because there is a usb input ONLY. But my notebook is my only source, and this way the signal has a very short way with no switches in line except the pot.

Feets are two pairs of Soundcare spikes!

Here are some pics, if they aren't too large...

Happy listening!
martin
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Old 23rd May 2009, 03:06 PM   #1093
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pic two
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Old 23rd May 2009, 03:07 PM   #1094
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pic three
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Old 23rd May 2009, 03:08 PM   #1095
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pic four
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Old 23rd May 2009, 03:10 PM   #1096
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pic five
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Old 23rd May 2009, 03:11 PM   #1097
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pic six...
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Old 23rd May 2009, 03:13 PM   #1098
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allright, finally: pic seven
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Old 25th May 2009, 06:29 PM   #1099
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Thats a thing of beauty! .... well done.!
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Old 25th May 2009, 07:07 PM   #1100
Pato666 is offline Pato666  Argentina
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Default CONGRATS!

Well done Martinbls!

very nice design!
Congratulations!
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A word about me and my projects http://www.cristianortegadelrio.com [Brand new site!]
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