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18th December 2003, 09:19 AM
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#1 |
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diyAudio Member
Join Date: Sep 2001
Location: Wellington NZ
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Aleph 2 photo shoot.
This is the coolest amp (or anything) that I have ever made.
Im really pleased with the result of my metal work and the electronics. Transformers are from Harbuch in Australia. They are 1KVA 35 0 35. Power supply caps are all surplus. There are 2 x 35 V 100000 in series paralleled with a 70 V 68000 cap per rail total of about 120000 per rail or I like to think of it as half a farad total  Its so beautiful how my lights flicker on power up, but anything less than a 10 amp fuse eventually blows.Ive used a 3 watt 1k resistor to across the caps in series to give them equal volt drop. Bride rectifiers are surplus and so is all the metal. The front panel and lid are made of 8mm aluminum plate. The lid has 6mm allen heads bolts recessed into it. All other metal is 4 mm plate. Cabling is also surplus, in fact al the surplus stuff is out of old mainframe power supplies. The sinks are from Plinius, all old stock from an amp that never made production. Boards are from Harvardin, thanks, they are real professional. All semis are from Mouser, IRFP244 matched. DC offset is 17mV on one and 22mV on the other. There is no turn on or turn off thump. Heat is not too bad, they weigh about 25-30 kgs and the thick plate lid helps in the heat transfer. I can keep my hand on for a long time and it don’t burn so Im picking its running in the late 50 degree mark? Last but not least, orange LEDs. Blue is so 90s  Nelson if your out there thanks big time. |
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18th December 2003, 09:32 AM
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#6 |
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diyAudio Member
Join Date: Aug 2001
Location: Ingolstadt Germany
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Luke,
very nice and clean!! What bias setting? william P.S. if you can keep your hand on for a long time it´s below 50°C
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een ooievaar is geen konijn want zijn oren zijn te klein! |
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19th December 2003, 01:47 AM
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#8 |
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diyAudio Member
Join Date: Jan 2003
Location: Texas, Love it or leave it
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Beautiful case! The clean line of screws on the top plate looks great.
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19th December 2003, 01:56 AM
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#10 |
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diyAudio Member
Join Date: Jul 2002
Location: Ever sunny San Diego
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Nice looking amps Luke. You didn't say how they sound in your post!?! Let us know! I even like the cute hat your wife put on the left speaker!
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Philip "If you didn't make it with your own two hands, its not really yours". |
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