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Old 21st August 2019, 11:49 PM   #31
flamethrower1 is offline flamethrower1  United States
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F5 V3
Point taken, have you ran into any problems finding room for everything in a 4U chassis?
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Old 22nd August 2019, 12:42 AM   #32
flamethrower1 is offline flamethrower1  United States
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What are the wattage values you are using for the 20ohm resistors, are they 1/2 watt as called out in the original BOM
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Old 22nd August 2019, 02:26 PM   #33
rhthatcher is offline rhthatcher  United States
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I just confirmed that I used 0.5W snubber resistors.


4U chassis should be perfect.



If there is the chance you may want to go for a F5 turbo one day, consider biting the bullet to get a 5U chassis. It will work fine for your F5, and give you room to expand if you want to use the chassis for a larger future build.
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Old 23rd August 2019, 12:44 AM   #34
flamethrower1 is offline flamethrower1  United States
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F5 V3
Thanks for the info.
Have all parts ordered for the boards as they are.
Anyway, I am building this just to have a Nelson Pass design, never had the opportunity to listen to one of his amps and now I am going build one "with my own little hands".
Oh, any tips on soldering the aluminum heat sinks?
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Old 23rd August 2019, 03:59 AM   #35
Ben Mah is offline Ben Mah  Canada
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F5 V3
You don't solder aluminum heat sinks. Why do you think you need to solder them?
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Old 23rd August 2019, 12:21 PM   #36
flamethrower1 is offline flamethrower1  United States
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I thought I read somewhere that they were soldered.
Glad they do not need to be though as it sounds like it would be challenging
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Old 25th August 2019, 02:18 AM   #37
flamethrower1 is offline flamethrower1  United States
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I have a pair of Anthologys that I built and plan on running with this amp.
Here is quote from the designer,"The worst amplifier load is 5.6 ohms and -25 degrees at 58 Hz.
Will I be ok running this with a standard F5V3 with the 18 volt Antek?
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Old 25th August 2019, 07:20 AM   #38
AudioSan is offline AudioSan  Norway
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Originally Posted by flamethrower1 View Post
Thanks for the info.
Have all parts ordered for the boards as they are.
Anyway, I am building this just to have a Nelson Pass design, never had the opportunity to listen to one of his amps and now I am going build one "with my own little hands".
Oh, any tips on soldering the aluminum heat sinks?
Are you thinking of the rectifier heatsinks?

if so, there is 2 pins on the underside of the sinks. Solder dem to the PCB like any other Component. Just remeber to screw down the rectifier diodes to the heatsinks first.
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Old 25th August 2019, 07:27 AM   #39
Luke is offline Luke  New Zealand
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Originally Posted by AudioSan View Post
One more time. this is a standard 1 pair F5 version 3. not a F5 turbo V3.
Can you post a link to the F5 V3? I have never heard of it.
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Old 25th August 2019, 07:54 AM   #40
AudioSan is offline AudioSan  Norway
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It is just a F5. But with the latest diyaudiostore boards. v3. F5 – diyAudio Store
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