Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Pass Labs This forum is dedicated to Pass Labs discussion.

F6 Illustrated Build Guide
F6 Illustrated Build Guide
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 12th June 2019, 05:53 PM   #1321
wdavis009 is online now wdavis009  United States
diyAudio Member
Join Date: Sep 2005
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.
  Reply With Quote
Old 13th June 2019, 05:47 AM   #1322
mlwebb is online now mlwebb  United States
diyAudio Member
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.
Attached Images
File Type: jpg front.jpg (331.0 KB, 84 views)
File Type: jpg bottom.jpg.jpg (326.4 KB, 85 views)
File Type: jpg top.jpg (419.5 KB, 82 views)
File Type: jpg left.jpg (325.6 KB, 82 views)
File Type: jpg right.jpg (420.8 KB, 78 views)
File Type: jpg side-back.jpg (266.1 KB, 45 views)
  Reply With Quote
Old 13th June 2019, 06:41 AM   #1323
ColinA123 is offline ColinA123  United Kingdom
diyAudio Member
Join Date: Jun 2017
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.
  Reply With Quote
Old Today, 01:07 PM   #1324
Alex Cazanescu is offline Alex Cazanescu
diyAudio Member
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.

Attached Images
File Type: jpg thumbnail.jpg (168.6 KB, 23 views)
  Reply With Quote
Old Today, 01:24 PM   #1325
Zen Mod is offline Zen Mod  Serbia
Official Court Jester
diyAudio Member
Zen Mod's Avatar
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
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
my Papa is smarter than your Nelson !
clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa... by Mighty ZM
  Reply With Quote


F6 Illustrated Build GuideHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Aleph J illustrated build guide 6L6 Pass Labs 3663 Yesterday 11:20 PM
diyAudio Power Supply Circuit Board v3 illustrated build guide 6L6 Power Supplies 882 Yesterday 07:26 AM
F5Turbo Illustrated Build Guide 6L6 Pass Labs 564 16th May 2019 02:25 PM
BA-3 Amplifier illustrated build guide 6L6 Pass Labs 224 11th May 2019 06:40 PM
ACA illustrated build guide 6L6 Pass Labs 157 1st February 2019 01:02 AM

New To Site? Need Help?

All times are GMT. The time now is 03:15 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio