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Old 21st September 2009, 08:23 PM   #41
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I'll do you one better:

http://export.farnell.com/wakefield-...92?Ntt=1651792

Last edited by BrianDonegan; 21st September 2009 at 08:25 PM. Reason: Fixed link
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Old 21st September 2009, 08:26 PM   #42
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Incidentally, I will be shipping thermal paste with the kits for mounting the transistors.
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Old 21st September 2009, 08:35 PM   #43
Beefy is offline Beefy  Australia
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Wakefield or Aavid, 50/50

Link still no worky for me, but here are equivalents from Mouser:
1 inch
1.5 inch
2 inch
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Old 21st September 2009, 10:01 PM   #44
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Thanks guys. Much appreciated!
Brian is spot on in the sensee that I actually had the bulkier Wakefield 647 in the basket (farnell order code 1219494) but looking at the Placid pics it hit me that perhaps I should settle for the 637 one!

Last edited by TheShaman; 21st September 2009 at 10:06 PM.
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Old 21st September 2009, 10:15 PM   #45
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Ok, it was Farnell# 1651792

Several companies make identical knockoffs.

I will post the BOM when I get around to fixing the page.
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Old 22nd September 2009, 11:12 AM   #46
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Quote:
Originally Posted by BrianDonegan View Post
Ok, it was Farnell# 1651792
To save time for people in the same spot as I am:
These are out of stock at the moment.
I contacted Farnell and they expect new stock in a week or two (they actually said Oct. 5th but I've noticed they sometimes receive stock ahead of schedule).

Alternatives:
  • The RoHS compliant variant of the one Brian suggested (Order Code: 1219495) - which is unfortunately double the price!
  • Multicomp's alternative (Order Code: 1710605) - Cheap. RoHS compliant.
  • Aavid's alternative (Order Code: 1213463) - More expensive than Multicomp, RoHS compliant

There are many more that I'm sure will actually fit...
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Old 22nd September 2009, 03:09 PM   #47
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Btw, although I have already ordered mine, it might help others (and my future Buffalo projects ) if the 1-inch alternatives were available at TP's website (Parts Bin).
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Old 23rd September 2009, 01:49 AM   #48
nacder is offline nacder  Hong Kong
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Russ or Brian,

Quote:
Originally Posted by nacder View Post
Can I use a 18-0-18V transformer to power the Placid BP, tying AC1.2 & AC2.1 together?
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Old 23rd September 2009, 02:02 AM   #49
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Quote:
Originally Posted by nacder View Post
Can I use a 18-0-18V transformer to power the Placid BP, tying AC1.2 & AC2.1 together?
The PCB is not really designed for a center tapped transformer.

Still you could use one if you understand the schematic.

One way (probably the simplest) would be to omit the two on-board bridge rectifiers. Then use a single external bridge rectifier and connect the center tap or your transformer secondary to the PCB GND and V+ from the external rectifier to the positive side of where A1 used to be. And V- to the negative side of where A2 used to be.

There are other creative solutions too. Choose any you like, or just use a dual secondary transformer.

Cheers!
Russ
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Old 29th September 2009, 11:27 PM   #50
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Both Placid and Placid BP kits are now available.
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