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Old 2nd December 2007, 08:37 PM   #1621
carpenter is offline carpenter  United States
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Match the NNN and the PPP. Don't worry so much about the N and P having the same values.

Purchase a bunch and match your own. This gives you experience and spares.
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Old 2nd December 2007, 08:41 PM   #1622
Andrzej Sochon is offline Andrzej Sochon  Poland
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Quote:
Originally posted by carpenter
another
.

I see a black heatsink with diodes. Are the diodes hot?
a.
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Old 2nd December 2007, 08:47 PM   #1623
carpenter is offline carpenter  United States
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diodes are cold as a well digger's butt
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Old 2nd December 2007, 10:25 PM   #1624
Vix is offline Vix  Yugoslavia
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Quote:
Originally posted by carpenter
Here's a Wakefield 392-300AG heatsink given to me from a fellow carpenter. He had no idea what it was, but thought I might be able to put it to good use.

I purchased a mate for it at a cost of $160.00. This will be my first F4. For the rest of the F4s, I'm going to play with water cooling.

Caps in PS are 47,000uF each.

Ugly!

(Choky will wait until you post a pic of a finished amp and present it in its full ugliness )

p.s. In the dark,it doesn't matter if its ugly or not, as long as it sounds good!
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Old 2nd December 2007, 10:32 PM   #1625
carpenter is offline carpenter  United States
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Quote:
Originally posted by Vix
p.s. In the dark,it doesn't matter if its ugly or not, as long as it sounds good!
So true; I've been told that the same can be said of the person in our bed, sleeping next to us...
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Old 2nd December 2007, 10:41 PM   #1626
Zen Mod is offline Zen Mod  Serbia
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woodie
please use metal screws for output fets ; these plastic ones are just begging for bubble gum effect ....... then pufff!
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Old 2nd December 2007, 10:48 PM   #1627
Magura is offline Magura  Denmark
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Quote:
Originally posted by Zen Mod
woodie
please use metal screws for output fets ; these plastic ones are just begging for bubble gum effect ....... then pufff!

Wouldn't that actually be at least pufff, pufff, puff ?


Magura
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Old 2nd December 2007, 11:55 PM   #1628
Zen Mod is offline Zen Mod  Serbia
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Quote:
Originally posted by Magura



Wouldn't that actually be at least pufff, pufff, puff ?


Magura




next we'll see woodie's BFR91 amp ..............

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Old 3rd December 2007, 12:36 AM   #1629
carpenter is offline carpenter  United States
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You guys are funny...

Metal screws carry the fet tab through the mica and into the heatsink, thereby causing a direct short!
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Old 3rd December 2007, 12:38 AM   #1630
Magura is offline Magura  Denmark
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Quote:
Originally posted by carpenter
You guys are funny...

Metal screw carry the fet tab through the mica and into the heatsink, thereby causing a direct short!

Which is why you use an insulator for the bolt

Really, the nylon bolts are going to give up the ghost sooner than you expect.


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