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Old 15th December 2008, 06:51 PM   #211
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I sent payment for 2 PSU and 1 F4 board. Thanks!
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Old 15th December 2008, 07:24 PM   #212
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Default PSU and other e-caps.

Peter,
On previous F4 thread, you mentioned that 40mm is a tight fit for caps on the PS boards. Do you know if Nichicon Super or Gold 40mm caps will fit if inverted from the resistors?


also, on the F3 boards, ido you know off hand the max-width of C1 and the nearby e-caps?

Just trying to get parts ready.
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Old 15th December 2008, 07:39 PM   #213
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Those boards are truly universal and will accept most anything

The F3 PS has even special holes for screw in terminals, picture below shows that 52mm (2") Sikorel caps will fit there without problem.

If the caps have lugs, you need to make additonal cut outs to acomodate those.

On F3, C1 can be up to 36mm, which is the size of Jensen 10000/63 and pin spacing 6, 10, 18 or 25mm.

The other caps are up to 16mm dia with exception of C10 which can be only up to 13mm, pin spacing 5 or 7.5mm
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Old 15th December 2008, 08:11 PM   #214
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Hi Peter.

really idea nice idea to maintain same spacing across fets.. in fact, I have one F4 up and running.. ready for accomodating F5 in same box thanks!

2 x F5 for me .. payment done.

btw are you planning to complete the F series ?

ciao
Vale
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Old 15th December 2008, 09:26 PM   #215
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Quote:
Originally posted by Valeriano
....really idea nice idea to maintain same spacing across fets.. in fact, I have one F4 up and running.. ready for accomodating F5 in same box

....btw are you planning to complete the F series ?
If Mr. Pass approves, I can do that.
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Old 15th December 2008, 09:57 PM   #216
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Quote:
Originally posted by Peter Daniel


If Mr. Pass approves, I can do that.

did Nelson put any restriction on his previous F designs?
or is it just lack of interest from diya folks?
.. sorry maybe you already answered to this question.

btw forgot to say thanks for doing this.

ciao
Vale
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Old 15th December 2008, 10:30 PM   #217
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Quote:
Originally posted by Valeriano
did Nelson put any restriction on his previous F designs?
or is it just lack of interest from diya folks?
.. sorry maybe you already answered to this question.
AFAIR, he never did, but it's always apropriate to ask.

And thanks for your payment
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Old 15th December 2008, 11:14 PM   #218
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Hi Peter
I want to build a 10-12 channel amp for my pair of Orions by Linkwitz Lab(under construction, 5 drivers in each speaker,each driver driven separately) Which boards do you recommend and how many?
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Old 15th December 2008, 11:37 PM   #219
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If 25W per channel is enough for you, I would suggest F5 as it's simplest with least parts of the recent F series amps. Especially nice feature is "No capacitors anywhere in the circuit. (except in the power supply, of course!)"

http://www.firstwatt.com/products.htm
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Old 16th December 2008, 12:16 AM   #220
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What do you guys think about this heatsink?

farnell heatsink link

Fins 40mm (1 1/2") with 10mm (3/8") thick base plate, 100mm (4") high and 300mm (12") long

Its rated at 0.4 degC/w which I know is a wee bit high but the next one up is $$$ more. Its also a very reasonable size to fit in my rack and it won't be as tight a fit between the shelves...

Is it reasonable to mount Q3 and Q4 out to the very tips of the their legs to spread them out as far as possible on the heatsink (12" long) or will that cause problems?


Fran
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