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Nakamichi  
#1 Posted : Monday, August 2, 2010 2:05:00 PM(UTC)
Nakamichi

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Joined: 6/20/2010(UTC)
Posts: 28
Location: Germany

Hi to all,
for better cooling, I would like to mount the transistors to a central heatsink,which dissipates
direclty towards outside of the cabinet.
Length of the wires would be about 15-20cm.
Any disadvantages from that, like catching noise from the environment?
All the best,
Nak
Russ White  
#2 Posted : Monday, August 2, 2010 4:07:44 PM(UTC)
Russ White

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Joined: 10/24/2006(UTC)
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Location: Nashville, TN

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You can mount the entire board to a heat sink by putting the transistors horizontal with the lead coming up through the bottom of the board.
Nakamichi  
#3 Posted : Tuesday, August 3, 2010 12:36:14 AM(UTC)
Nakamichi

Rank: Member

Groups: Member
Joined: 6/20/2010(UTC)
Posts: 28
Location: Germany

Hello Russ,
thank you for the advice, I know this mod from this forum.

The whole Buffallo/IvyIII/Placid arragement will be
used to modify one of those tank-like built CD-Players from the late eighties.
BTW the mod is future-proof, I still have spare parts like lasers, motors and gears.

There is plenty of room, the original D/A Board will be removed.
I will also get custom wound toroids for the Players circuitry as wells as for the Placid/BII/IVYIII combo.

But the servo circuits of the player dissipate
a lot of heat as well, even though the cabinet is vented.

So it would be better to place the Placids trannies
directly to the players aluminium backplate and mount a heatsink on the outside, using thermal paste.

Placing the trannies away from the pcb is not advised because of picking up HF-noise?

All the best,
Nak
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