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6th March 2006, 12:07 AM
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#2001 |
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diyAudio Member
Join Date: Jun 2005
Location: Manila
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Hi -
1 XPC 94HB 4 CEM-1 94V0 2 FR-1 94V0 5 CEM-3 94V0 3 FR-2 94V0 6 FR-4 94V0 FR4 - woven fiberglass base material; 94V0 refers to UL safety standard - how fireproof the boards are. Typical for motherboards and computer peripherals is #6 - FR-4 94V0. FR2 is paper phenolic; CEM1 is paper with 1 layer glass; CEM3 is 'flies' fiberglass. XPC is the cheapest stuff, used for very low-end devices (i.e. calculators, remote controls etc). Check http://www.eternal.com.tw/english/ht.../tablefive.htm and http://www.hta-bi.bfh.ch/E/ecad/PCB-...tandards_N.htm Cheers! |
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6th March 2006, 05:58 PM
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#2002 |
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diyAudio Member
Join Date: Feb 2004
Location: Recife - Brasil Northeast
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Symassym is beeing constructed in Brazilian Capital
Boards are starting to beeing made, my nephews are making them, some units will produce nice sound in our Capital.
Thank's Bittner for his nice amplifier. regards, Carlos
__________________
Try to build an amplifier folks ... it is pure adrenaline!.. when not work first time, then becomes a nice challenge...and we usually overcome the trouble... and we feel very well to be mastering the machine. |
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6th March 2006, 06:09 PM
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#2003 |
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diyAudio Member
Join Date: Feb 2004
Location: Recife - Brasil Northeast
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The boards will be hand made using a photo process
Here is the link with the tutorial in Portuguese to produce boards at home:
http://leobenez.tripod.com/circuito.html regards, Carlos
__________________
Try to build an amplifier folks ... it is pure adrenaline!.. when not work first time, then becomes a nice challenge...and we usually overcome the trouble... and we feel very well to be mastering the machine. |
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6th March 2006, 06:56 PM
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#2004 |
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diyAudio Member
Join Date: Apr 2004
Location: Gütersloh
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Hi !
Sheldon, great work ! Have you already been able listening to them ? Chuck, yes it's okay to have the profit for the costs of delivery and the beers drunk during that work...  Ethan, No3, the FR4 material would be the correct one. Carlos, thanks for the infos, it's always nice to see symasym beeing built all around the world ! Mike |
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6th March 2006, 11:23 PM
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#2008 | |
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diyAudio Member
Join Date: Jun 2005
Location: Manila
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Quote:
Mike, you may have gotten a bit confused there - FR4 is the #6 entry. It's in two-column format. Unscrambled: 1 XPC 94HB 2 FR-1 94V0 3 FR-2 94V0 4 CEM-1 94V0 5 CEM-3 94V0 6 FR-4 94V0 Cheers Clem |
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7th March 2006, 11:17 AM
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#2010 |
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diyAudio Member
Join Date: Feb 2004
Location: Recife - Brasil Northeast
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Yeah!...my nephew is starting the work, today we gonna construct the transformer
reconstructing a 220 to 110 Volt AC transformer...it is a 1 Kilowatt trafo...it may work fine with a heavier gauge wire on it.
Here is the image of my nephew and the circuit to be made using a photo process. regards, Carlos
__________________
Try to build an amplifier folks ... it is pure adrenaline!.. when not work first time, then becomes a nice challenge...and we usually overcome the trouble... and we feel very well to be mastering the machine. |
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, i have absolutely no idea about the word "dandy"...
