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.

Sony Vfet Illustrated build guide
Sony Vfet 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
Reply
 
Thread Tools Search this Thread
Old 22nd January 2018, 05:43 AM   #441
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
Sony Vfet Illustrated build guide
30Vdc ......... once , or twice ?

lost ground , or lost rail somewhere ,along the way ?
__________________
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
Old 22nd January 2018, 07:03 AM   #442
slimecity is offline slimecity  New Zealand
diyAudio Member
 
Join Date: Jan 2009
I think I have a bad ground - i will double check that.......
  Reply With Quote
Old 24th January 2018, 04:12 AM   #443
slimecity is offline slimecity  New Zealand
diyAudio Member
 
Join Date: Jan 2009
OK - Im not very good at mentally sussing out power supply requirements to please bear with me. I'm not totally sure what I am aiming for here. I have followed the general gist of the post on page 1 of this thread to build the powersupply. I have done it as per the attached. Is this right? I take it Im not aiming for plus 30-0-minus 30VDC? As I dont have that currently. I am getting:

* 30VDC between the wires on each side on the powersupply and
* As well as the above, plus 30VDC between ground and plus on one side and
* As well as the above, minus 30VDC between ground and minus on the other side.

Am I overthinking this? I basically have the same powersupply sorted out as per the diagram in this thread except without the resistors. Would I be better off installing the universal power supply boards sold in the diyaudio store? Im not sure that I have room in my case now.....thanks!
Attached Images
File Type: jpg 20180124_180508.jpg (485.9 KB, 361 views)

Last edited by slimecity; 24th January 2018 at 04:16 AM.
  Reply With Quote
Old 24th January 2018, 04:33 AM   #444
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
Sony Vfet Illustrated build guide
this way
Attached Images
File Type: jpg damn-PSU.jpg (51.4 KB, 357 views)
__________________
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
Old 24th January 2018, 04:52 AM   #445
slimecity is offline slimecity  New Zealand
diyAudio Member
 
Join Date: Jan 2009
Okaaaaaaaayyyyy!

Great - thanks - and I assume that the plus, gnd and minus in your revised diagram goes identically to both modules?

Sorry but I can be a muppet sometimes.
  Reply With Quote
Old 24th January 2018, 05:11 AM   #446
Ben Mah is offline Ben Mah  Canada
diyAudio Member
 
Join Date: May 2012
Location: Vancouver
Adding the resistors between the capacitors will also reduce the ripple voltage.

And if you are referring to each channel as a module, then yes the plus and minus voltages and ground need to be connected to both channels.
  Reply With Quote
Old 24th January 2018, 05:48 AM   #447
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
Sony Vfet Illustrated build guide
Quote:
Originally Posted by slimecity View Post
Okaaaaaaaayyyyy!

Great - thanks - and I assume that the plus, gnd and minus in your revised diagram goes identically to both modules?

Sorry but I can be a muppet sometimes.
if you're having dedicated PSU per channel , then yes ....... if that is what you're asking
__________________
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
Old 24th January 2018, 09:43 AM   #448
RainfallSky is online now RainfallSky  Russian Federation
diyAudio Member
 
RainfallSky's Avatar
 
Join Date: Jul 2015
Location: Saint-Petersburg
I manage to get original black anodized TO-3 brackets, PCBoards and VFETs but without anything for mounting.
Can owners of ESSENTIALS kit tell what was in the mounting hardware pack?
Need to know type of bolts and their size and size of washers for TO-3 bracket.

And also what type of screws should mount Q5, Q6 transistors heatsink?
M4 are too big, M3 too small. Should be something like M3.5 maybe?

TO-3 brackets have 4 mm holes pre-drilled to mount UMS compatible heatsink.
Tried M4 bolts and they fit just right.
But by Universal Mounting Specification Deluxe 4U and 5U chassis heatsink should be pre-drilled for M3 bolts/screws.
So should there be kind of washers for bracket's UMS mounting holes?
I was planning to buy Deluxe 4U case for Amp in future.
  Reply With Quote
Old 24th January 2018, 04:55 PM   #449
Ben Mah is offline Ben Mah  Canada
diyAudio Member
 
Join Date: May 2012
Location: Vancouver
Take a look at 6L6's "build guide" posts at the beginning of this thread as they answer some of your questions.
  Reply With Quote
Old 25th January 2018, 07:49 AM   #450
RainfallSky is online now RainfallSky  Russian Federation
diyAudio Member
 
RainfallSky's Avatar
 
Join Date: Jul 2015
Location: Saint-Petersburg
Thank you, Ben Mah.

Most of the answers is found and other will be found eventually.

UMS heatsink mounting hardware contains of M3 screw, lock washer, washer.
There are no length sizes but heatsink is 5 mm thick and UMS heatsink is 1.5 mm thick with a threads tapped to a minimum depth of 5mm.
So 10 mm length M3 screw would be OK.
Although T-bracket UMS predrilled holes are much bigger than M3 screws I did not saw any complains.
I guess it's kind of OK too.

V-FET's mounting hardware contains of bolt, small washer, lock washer, nut and insulator.
No sizes but M4 bolts fit.
Length of bolts used on photos are bigger than needed, about 15-20 mm.
Since T-bracket is 5 mm thick insulator should have 5 mm length.
Predrilled holes for V-FET's are 7 mm so insulator should thick as this or less.

Q7, Q9 transistors mounting hardware contains of bolt, big washer, small washer, lock washer.
M4 bolt fits predrilled T-bracket 4 mm hole.
But by Vishay IRFP240 datasheet transistor mounting hole are 3.51-3.66 mm so bolts are M3.
Transistor is about 5 mm thick, T-bracket 5 mm plus nut and washers.
So bolt length should be about 20-25 mm.

Q5, Q6 transistors heatsink mounting hardware contains of screw, washer, small washer, lock washer and plastiс shoulder washer for transistors with exposed metal tab.
Found mounting kit for this in the BOM.
  Reply With Quote

Reply


Sony Vfet 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
F5Turbo Illustrated Build Guide 6L6 Pass Labs 471 Yesterday 09:19 PM
Aleph J illustrated build guide 6L6 Pass Labs 2868 Yesterday 02:31 PM
ACA illustrated build guide 6L6 Pass Labs 145 21st September 2018 05:09 PM
BA-3 Amplifier illustrated build guide 6L6 Pass Labs 155 21st September 2018 12:30 PM
F6 Illustrated Build Guide 6L6 Pass Labs 1192 8th September 2018 10:40 PM


New To Site? Need Help?

All times are GMT. The time now is 06:02 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki