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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
diyAudio Member
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
diyAudio Member
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
Hoopy Frood
diyAudio Member
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.
We are fearless amplifier builders. A little heat doesn't scare us at all.
- NP 2002
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Old 12th January 2021, 10:12 PM   #4
McQuaide is offline McQuaide  United States
diyAudio Member
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?
Mark Micro Seiki DDX-1000>Pearl 2>BA-3 FE>F5>Mirage OM-7 Towers
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Old 13th January 2021, 03:11 PM   #5
tyerkey is offline tyerkey
diyAudio Member
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
diyAudio Member
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
diyAudio Member
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?
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