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Randy Slone "Fig 11.6" amp, modded: will work?
Randy Slone "Fig 11.6" amp, modded: will work?
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Old 8th January 2007, 12:27 PM   #81
AndrewT is offline AndrewT  Scotland
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Hi,
your C3 is fairly close (looks about 20 to 30mm away).
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Old 8th January 2007, 12:44 PM   #82
tcpip is offline tcpip  India
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Randy Slone "Fig 11.6" amp, modded: will work?
Quote:
Originally posted by AndrewT
your C3 is fairly close (looks about 20 to 30mm away).
Yes, I too was of the opinion that the current placement of the caps C3, etc are not too bad because (i) they're feeding input+VAS which are not very high current draws, and (ii) they are fairly close already. And if push comes to shove, I wanted the C3 to be close to the input stage rather than the VAS, because I thought that stage would be more sensitive.
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Old 15th January 2007, 01:58 AM   #83
tcpip is offline tcpip  India
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Randy Slone "Fig 11.6" amp, modded: will work?
Do these L-MOSFETs need shoulder washers on their bolts to fix them to the heatsink? I know the 2SA1943/5200 BJTs don't need shoulder washers, because the metal surface on their rear sides don't touch the central hole, hence that surface never makes contact with the bolt.

If you guys don't use the term "shoulder washer", I'll explain. These are small insulating washers which are put on bolts when you bolt a TO3 package to a heatsink. This prevents the bolt from ever touching any part of the TO3 metal body.
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Old 15th January 2007, 11:02 AM   #84
AndrewT is offline AndrewT  Scotland
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Hi,
I think all the To264 & To247 have the same isolated hole for the bolted fixing.

Many advise adding a flat washer to spread the bolt head load over the face of the semiconductor package.
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Old 17th January 2007, 01:09 AM   #85
tcpip is offline tcpip  India
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Randy Slone "Fig 11.6" amp, modded: will work?
Quote:
Originally posted by AndrewT
I think all the To264 & To247 have the same isolated hole for the bolted fixing.
Great. This makes things easier.

Quote:
Many advise adding a flat washer to spread the bolt head load over the face of the semiconductor package.
Yes, I always do this. But since there's no electrical issue here, I can use a metal washer.
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Old 29th May 2007, 10:31 PM   #86
Flavio88 is offline Flavio88  Italy
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hi tcpip, i need the eagle file of the slone 11.6 amp schematic.
Can you mail me that file?
Thanks...
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