Building an F5 Turbo v2 (in-Progress) - Page 2 - diyAudio
Go Back   Home > Forums > Amplifiers > Pass Labs

Pass Labs This forum is dedicated to Pass Labs discussion.

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 18th February 2013, 01:01 AM   #11
diyAudio Member
 
bnorrish's Avatar
 
Join Date: Oct 2012
Location: Boston
Looking forward to another 6L6 build.!

Quote:
Originally Posted by 6L6 View Post
Why? Three reasons -- Heatsink, heatsink and heatsink.
A 2pr stereo is about all the 5U can handle.
If the 5u heatsinks cannot take 4, what would you need to use to build the V2 from the schematic?
  Reply With Quote
Old 18th February 2013, 02:07 AM   #12
6L6 is offline 6L6  United States
diyAudio Member
 
6L6's Avatar
 
Join Date: Oct 2010
Location: Denver, Colorado
Quote:
Originally Posted by bnorrish View Post
If the 5u heatsinks cannot take 4, what would you need to use to build the V2 from the schematic?
This case (5U 400mm)

Something is getting lost in translation as I haven't gotten to those photos yet... This is going to have the V2 from the schematic, with 2 output pairs and diodes.

This is a photo of one channel output boards on the heatsinks, the Front-End board will be mounted on the baseplate.

Click the image to open in full size.

I will continue the guide shortly.
  Reply With Quote
Old 18th February 2013, 02:08 AM   #13
6L6 is offline 6L6  United States
diyAudio Member
 
6L6's Avatar
 
Join Date: Oct 2010
Location: Denver, Colorado
Quote:
Originally Posted by Zen Mod View Post
6L6 - be sure , later , to (edit) include link in first post in thread - directly to powering up/biasing procedure ..... which you are going to write , in detail
Yes, that info, as well as much more procedure in general will all be in the official guide. This thread is just the teaser.
  Reply With Quote
Old 18th February 2013, 02:16 AM   #14
PKI is offline PKI  United States
diyAudio Member
 
PKI's Avatar
 
Join Date: Aug 2011
Buzz, can you please point to the thread/post where 2nd and 3d harmonics adjustment with P3 described? Can't find it :-(
  Reply With Quote
Old 18th February 2013, 04:32 AM   #15
biju55 is offline biju55  India
diyAudio Member
 
biju55's Avatar
 
Join Date: Jul 2011
Location: Kuwait and India
Send a message via Skype™ to biju55
6L6 , where did you buy this heat sink chassis from ?
  Reply With Quote
Old 18th February 2013, 04:36 AM   #16
diyAudio Member
 
Join Date: Mar 2007
Location: Bandung
Quote:
Originally Posted by biju55 View Post
6L6 , where did you buy this heat sink chassis from ?
I think from DIY Audio Store
5U Amplifier Chassis w/ Aluminum Heatsinks and Faceplate - Full width with 40mm Heatsinks - Chassis

Didiet
  Reply With Quote
Old 18th February 2013, 05:03 AM   #17
diyAudio Member
 
Join Date: Jun 2009
6L6: how did you configure the first PSU board with the filter resistors so that all 8 caps are connected BEFORE the resistors (and not 2 caps before the resistors and 2 caps after them per rail)?
  Reply With Quote
Old 18th February 2013, 05:11 AM   #18
6L6 is offline 6L6  United States
diyAudio Member
 
6L6's Avatar
 
Join Date: Oct 2010
Location: Denver, Colorado
Click the image to open in full size.
At this point it becomes necessary to power things up in stages to verify that the PSU is working properly. Here you can see a temporary AC hookup on the far end, and the secondaries connected to the rectifier, and a centertap made from the inside wires. There should be +35v between the V+ pad on the bridge board and the centertap, -35v between V- and the centertap.

Click the image to open in full size.
Don't forget that the bottoms of the diodes are conductive, so you must use an insulator. These particular silpads are made for this case, and insulate well, but are small and require care when mounting to make sure they are in the right spot.


Anyway, if the bridge tests properly, then connect it to the capacitor boards. It's a good idea to use a light bulb mains lead for this.

Click the image to open in full size.

Click the image to open in full size.
(This is temporary wiring)
Check the voltages at the far side of the PCB, check the LEDs for proper operation.


Click the image to open in full size.
As the build progressed I needed to adjust the position of the bridge, and I added a terminal block for the transformer secondaries. (I am likely going to use this chassis for more than one guide, and keeping the transformer easily interchangeable will be useful.)

Click the image to open in full size.
Wiring from Bridge to PCB

Click the image to open in full size.
The completed DC section of the PSU

Last edited by 6L6; 18th February 2013 at 05:19 AM.
  Reply With Quote
Old 18th February 2013, 05:29 AM   #19
biju55 is offline biju55  India
diyAudio Member
 
biju55's Avatar
 
Join Date: Jul 2011
Location: Kuwait and India
Send a message via Skype™ to biju55
  Reply With Quote
Old 18th February 2013, 05:46 AM   #20
diyAudio Member
 
Join Date: Mar 2003
Location: midwest
Quote:
Originally Posted by buzzforb View Post
6L6,
looks great, as usual.
I am interested to see how that bottom takes the weight of the toroid. I have a suspician you might have some give.

Wayne,
my V3 is at home on sinks. Just didt get the PSU's finished.
Actually, its not bad at all. Just got my 5U Deluxe case put together. The way the two pans go together stiffens it considerably.

Russellc
__________________
Pass DIY B-1, Pass DIY F-5
  Reply With Quote

Reply


Hide 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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
F5 Turbo is posted Nelson Pass Pass Labs 635 6th April 2014 10:51 AM
F5 turbo heatsinks AudioSan Pass Labs 21 31st August 2013 01:47 PM
F5 turbo problems Rob Dingen Pass Labs 17 11th January 2013 08:38 PM
Best way to tune in BIAS F5 V2 Turbo Blink_PT Pass Labs 17 4th January 2013 10:40 AM
F5 Turbo ............. if only !!!!!! a.wayne Pass Labs 23 21st January 2012 02:24 AM


New To Site? Need Help?

All times are GMT. The time now is 06:19 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2