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First time F5 build
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Old 29th September 2018, 02:04 AM   #21
rayma is online now rayma  United States
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Join Date: Apr 2011
Quote:
Originally Posted by jakesnake1 View Post
I'm thinking about putting the PSU and the Amplifier in two different chassis for ventilation purposes.
Is it okay to have a long distance wire run between the rectifier and the amp?
Keep it all in one chassis, unless you want to go with monoblocks (two separate, mono amplifiers).
A separate power supply chassis won't help thermally.
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Old 29th September 2018, 02:34 AM   #22
jakesnake1 is offline jakesnake1  United States
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Location: Agoura Hills, CA
Okay y'all good news. I discovered the Digikey parts numbers in the BOM. Still lost on the ones without numbers though. Any guidance is appreciated.
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Old 29th September 2018, 02:37 AM   #23
jakesnake1 is offline jakesnake1  United States
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@Rayma, I see what you're saying but In my application, my bedroom cabinet is pretty small with not a lot of area for heat to dissipate. So I was thinking I could put one pretty box under my Tv for aesthetics (The amplifier) and hide the PSU somewhere with good ventilation. I believe it would overheat or damage my furniture if I kept it in one box.
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Old 29th September 2018, 02:41 AM   #24
rayma is online now rayma  United States
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Quote:
Originally Posted by jakesnake1 View Post
I could put one pretty box under my Tv for aesthetics (The amplifier) and hide the PSU
somewhere with good ventilation. I believe it would overheat or damage my furniture
if I kept it in one box.
The power supply dissipation (diode blocks and resistors) is small compared to
that of the audio channels. Instead, I'd use a cooling fan on each heat sink,
or else turn down the bias until your placement changes, if it's only short term.

Last edited by rayma; 29th September 2018 at 02:47 AM.
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Old 29th September 2018, 02:55 AM   #25
jakesnake1 is offline jakesnake1  United States
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Got my words mixed up sorry. I meant the PSU under my TV and the amp somewhere else. Unfortunately its not short term Is it a bad idea or just not ideal?

I put together the BOM Digi-Key - Fast Add still unsure on the other values for the Input snubber resistor and Input snubber Capacitors. Im using a single Antek 4218. I'll do some reading but would like a second opinion before I order.
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Old 29th September 2018, 03:12 AM   #26
rayma is online now rayma  United States
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Join Date: Apr 2011
Quote:
Originally Posted by jakesnake1 View Post
Got my words mixed up sorry. I meant the PSU under my TV and the amp somewhere else.
I would go with a single chassis. The audio boards/sinks are the biggest and hottest parts,
so the entire amp may just as well be somewhere else. There isn't any size or thermal
advantage to separating out the power supply, since the audio chassis would still be the
same size and heat dissipation.

Last edited by rayma; 29th September 2018 at 03:17 AM.
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Old 29th September 2018, 03:20 AM   #27
jakesnake1 is offline jakesnake1  United States
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Join Date: Sep 2018
Location: Agoura Hills, CA
Noted, I'll see if I can figure out another solution.

In the mean time. Any rec's for the input snubber resistor? It's weird because I read a couple of build guides and I cant seem to find any reference to this and another part.
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Old 29th September 2018, 04:55 AM   #28
Mrshazbot is offline Mrshazbot  United States
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Join Date: Oct 2017
Location: San diego
First time F5 build
Here is a thread that has some good PSU pictures. You can see the exact capacitors being used. I think these higher total capacitors than the PSU needs, but I don’t think it matters - Vishay 22000uf 35v. I also ask the same question about the CL60 but Digikey doesn’t have the part, had to order it from Mouser.

I just bought all the stuff myself but haven’t received it yet and went through all the questions you have and eventually figured it out after a month or so.

Here’s the post

diyAudio F5 Build Guide
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Old 29th September 2018, 05:11 AM   #29
Dennis Hui is online now Dennis Hui  Canada
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Join Date: Aug 2002
Location: Toronto, Canada
First time F5 build
CL60 at digikey:

CL-60 Amphenol Advanced Sensors | Circuit Protection | DigiKey
__________________
We are fearless amplifier builders. A little heat doesn't scare us at all.
- NP 2002
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Old 29th September 2018, 09:53 AM   #30
silasmellor is online now silasmellor  Denmark
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Join Date: Nov 2016
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First time F5 build
The snubber only makes sense if you know the right value from testing the ringing if the transformer you use afaik. It’s not mandatory, add that later if you get the possibility of testing your trafo.
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