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 21st May 2004, 12:22 AM   #1
diyAudio Member
 
MEGA_amp's Avatar
 
Join Date: Oct 2003
Location: CT
Default Soz

Here it is so far. The 8R on the white papers are 50 watters, I plan on using 250W, the paper is the footprint of the big Dales. I'm pretty sure the sink can handle 25-30W.
Attached Images
File Type: jpg 111.jpg (61.2 KB, 1010 views)
  Reply With Quote
Old 21st May 2004, 12:28 AM   #2
diyAudio Member
 
MEGA_amp's Avatar
 
Join Date: Oct 2003
Location: CT
Default #2

closeup
Attached Images
File Type: jpg 2.jpg (62.7 KB, 887 views)
  Reply With Quote
Old 21st May 2004, 12:31 AM   #3
diyAudio Member
 
MEGA_amp's Avatar
 
Join Date: Oct 2003
Location: CT
Default #3

side shot.

Eventually I will have to build a BOSOZ to drive it. I have every intention of X-ing it, but after all Ive heard about the SOZ, I wanna hear it stock first. I can only imagine bi-amping using the SOZ and Aleph 2. Sweet sound would be an understatement.


regards

JH
Attached Images
File Type: jpg 3.jpg (66.8 KB, 837 views)
  Reply With Quote
Old 21st May 2004, 12:40 AM   #4
moe29 is offline moe29  United States
diyAudio Member
 
moe29's Avatar
 
Join Date: Dec 2002
Location: Florida
Send a message via AIM to moe29 Send a message via Yahoo to moe29
I know those 250 watt Dale resistors are pretty expensive... did
you consider paralleling 50 watt resistors to get your 8ohms?
Might be cheaper than the price you're paying for the hefty 250's.

Plus it allows you to spread out the heat over more of the heatsink.

Looks pretty cool Always like seeing SOZ's.

consider X'ing it too.

keep us updated with pics!!

m.
  Reply With Quote
Old 21st May 2004, 01:58 AM   #5
Variac is offline Variac  United States
diyAudio Editor
 
Variac's Avatar
 
Join Date: Dec 2001
Location: San Francisco, USA
But can your house wiring handle it?

It might look nice it you make a wood frame with a recessed ledge on top for the heatsink to plop into. So it would be about 3" tall with the heatsink facing up. Low profile, kind of like B&O

Got my 50 watters from Apex Jr. He doesn't list them and I don't know if he has more, but he had 8 ohm for $2 ea.

GO Soz!!
  Reply With Quote
Old 21st May 2004, 03:41 AM   #6
diyAudio Member
 
MEGA_amp's Avatar
 
Join Date: Oct 2003
Location: CT
Default makes much more sense

I already have 8 - 8R 50 watters. All I need is 24 more, not too bad as they are $4.26 a piece, much cheaper than buying 8 250's. The 8R I have are RH type and I'll buy 24 more RH type, the 1R are NH type, I am assuming that this will be fine to mix. I read somewhere on this forum that RH are more warm sounding while the NH are more analytical, so if i mix them will I enter another dimension?

regards,
JH
Attached Images
File Type: jpg 8r pwr resistor.jpg (10.5 KB, 737 views)
  Reply With Quote
Old 22nd May 2004, 06:49 AM   #7
Blues is offline Blues  United States
Lightning In A Bottle
diyAudio Member
 
Blues's Avatar
 
Join Date: Sep 2003
Location: The Milky Way
Mega-amp, I see you take your hardware to bed uhmm something feels warm. Make sure that's a DOZ...Daughter of Z! Keep us posted.
  Reply With Quote
Old 23rd May 2004, 01:52 AM   #8
diyAudio Member
 
MEGA_amp's Avatar
 
Join Date: Oct 2003
Location: CT
Default revised layout

Heres what one channel will look like. 16 - 8R 50W in series-parallel, and 3 1R 50W. The 4 mosfets for both channels will be mounted on a separate sink 12"L x 9.75"W 2.2"Fins. Still debating whether I should go with 35 or 38 V secondaries. Will the fact that I'm doubling current from each X-formr be taken into consideration?
Attached Images
File Type: jpg 1.jpg (45.0 KB, 580 views)
  Reply With Quote
Old 23rd May 2004, 01:55 AM   #9
diyAudio Member
 
MEGA_amp's Avatar
 
Join Date: Oct 2003
Location: CT
Default PS

I may reduce some uF, we'll see
Attached Images
File Type: gif power supply 30w soz-sm.gif (26.9 KB, 585 views)
  Reply With Quote
Old 23rd May 2004, 02:32 AM   #10
moe29 is offline moe29  United States
diyAudio Member
 
moe29's Avatar
 
Join Date: Dec 2002
Location: Florida
Send a message via AIM to moe29 Send a message via Yahoo to moe29
...looking at that picture i remembered how much fun it was
drilling and tapping all the holes for those power resistors!!!
  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



New To Site? Need Help?

All times are GMT. The time now is 03:42 PM.


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