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F6 Illustrated Build Guide
F6 Illustrated Build Guide
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Old 12th June 2019, 05:53 PM   #1321
wdavis009 is online now wdavis009  United States
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Quote:
Originally Posted by chatziva View Post
Very nice! Did you wire it as a dual mono psu?
Yes, it has a dual mono power supply.
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Old 13th June 2019, 05:47 AM   #1322
mlwebb is online now mlwebb  United States
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Join Date: Dec 2007
Default Another first time F6

Hi Folks. I've been stopping by here occasionally for a decade, thinking, I ought to try building an amp sometime, finally gave it a go.
My case design is a little idiosyncratic - the back is blank, so it can go up against a wall, or on a shelf. The front will get a nice piece of wood, plain, and the top will be 3/8 glass, with ground edges, set up an 1/8" above the sides. The edges of the glass lighting up from the led's inside will serve as my power light.
I have a plan to add forced air if needed. I put the power inlet/switch up towards the front, to reach it easier, and the outputs on the back sides.

I used 6.9v zener (LM329)-3.3k R7,8; Jfets from punkydawgs, and VS-HFA25TB60-M3 Hexfred's for the rectifiers. Transformer is an Antek 3218 (300Va, dual 18v)

Please look the attached over and let me know if I have made any rookie mistakes, etc before I start it up. ( I built a bulb tester, and plan to unhook each amp side, test the psu, then one side at a time. I have the zeners turned down. The amp guides were great, but pics of the diyaudio psu rectifier boards wired up are a little shy (I found one) - so let me know if I have it right. Thank you to NP and all here.
Michael
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File Type: jpg side-back.jpg (266.1 KB, 45 views)
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Old 13th June 2019, 06:41 AM   #1323
ColinA123 is offline ColinA123  United Kingdom
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Location: Shropshire
Hi, looks interesting.
Just a heads up, on mine the adjustment pots worked backwards.
Something to watch for if bias starts to rise when switched on.
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Old Today, 01:07 PM   #1324
Alex Cazanescu is offline Alex Cazanescu
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Join Date: Dec 2017
Hello to everybody!
I just finished my amp today ,solving the issues I had after a wrong bias :-)...and I have to say that I`m very happy and surprised about the sound.It is indeed amazing.I like it a lot! Many thanks to Diyaudio for that and especially to Mr. Nelson Pass.

Though ,there is one single thing I would like to improve , if possible.I have the feeling the bass is a bit shy .Is it possible to add more weight to the bass somehow?

The bias was set to 0.51 V ( the mosfet second pin 62-63 degr C).
I have used 5.8 zenners and 3.3K resistors.

Thanks
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Old Today, 01:24 PM   #1325
Zen Mod is offline Zen Mod  Serbia
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F6 Illustrated Build Guide
give it some time , then judge the sound

pull up those mains NTCs , away from base plate

tell us more about rest of your setup , so we can comment where exactly to look for more bassssssssssssssssssssss
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