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F5 build questions
F5 build questions
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Old 12th January 2021, 06:22 PM   #1
tyerkey is offline tyerkey
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Join Date: Oct 2012
Default F5 build questions

Hi All,
I have finally begun building an F5 amplifier that I bought the boards for about 10 years ago. Life happened and the build just had to be shelved. I have a couple of questions that I need help with. I am slightly above novice range when it comes to electronics, so please be patient with me. My Previous build experience includes a pair of ACAs and a Bottlehead Quickie.

1) I am also a woodworker. I realize that there are parts of this amp that will get hot. If I have appropriate heat sinking, and the base plat of the chassis is steel, would it be safe to build the rest of the enclosure out of hardwood?

2) I know it may be in the build guide, but how do I compute the amount of heat sinking necessary to keep this amp cool enough?

3) I forget what else I was going to ask.
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Old 12th January 2021, 06:42 PM   #2
rayma is offline rayma  United States
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Join Date: Apr 2011
The base plate would need lots of holes for natural convection, or a fan.

These should get you started.
Heat Sink Size Calculator
Heat Sink Size Calculator | Celsia

Last edited by rayma; 12th January 2021 at 06:45 PM.
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Old 12th January 2021, 06:56 PM   #3
Dennis Hui is online now Dennis Hui  Canada
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Join Date: Aug 2002
Location: Toronto, Canada
F5 build questions
Another thing is to reference the build guide corresponding to your F5 PCBs,
since it's possible you may have an older version.
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We are fearless amplifier builders. A little heat doesn't scare us at all.
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Old 12th January 2021, 10:12 PM   #4
McQuaide is offline McQuaide  United States
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Join Date: Jan 2011
Location: Southeastern Pennsylvania
Wood is not a great idea given it doesn't isolate from all kinds of nearby interference. Maybe line it with aluminum sheet?
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Old 13th January 2021, 03:11 PM   #5
tyerkey is offline tyerkey
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Join Date: Oct 2012
Thank you all. I think I will bite the bullet and buy a chassis.
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Old 14th January 2021, 11:02 AM   #6
mkane77g is offline mkane77g  United States
Grandfather
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Join Date: Nov 2014
Location: 100 miles N. of S.F.
F5 build questions
Aleph J quiet as a graveyard. Run @ 53C.
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File Type: jpg 2020-12-06 02.15.06.jpg (826.4 KB, 76 views)
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Old 14th January 2021, 02:45 PM   #7
Centurion53 is offline Centurion53  United States
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Join Date: Dec 2018
Location: Albuquerque, New Mexico
Very interesting build! Would love to see more photos, is the power supply on board or external?
Thanks
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