My BoSoZ time for improvement - 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 8th April 2006, 11:31 AM   #11
lykkedk is offline lykkedk  Denmark
diyAudio Member
 
Join Date: Dec 2002
Location: Denmark, Fredericia
Send a message via MSN to lykkedk
Thank you... Just what I expected, regarding the PSU connection.

Now I can finish my PCB...

EDIT: The capacitor's - what voltage must they be ?
__________________
/// got to catch up again ///
  Reply With Quote
Old 8th April 2006, 11:39 AM   #12
Buhl is offline Buhl  Denmark
diyAudio Member
 
Buhl's Avatar
 
Join Date: May 2002
Location: Aalborg, Denmark
hello henrik
try and measure the dc on your old bosoz circuit, that is just before the DC blocking cap, and ground - I guess that if you go for around 30 volts you are good - I use two Elna cerafine electrolytic caps at 100uF/25 volt in a back to back connection, so I get 50uF at 50 volt, bypassed with a Vishay MKP 0,22uF - the bass is better this way than with my old polypropylene 10uF.

Cheers !
Hans
__________________
"Calculations? We don't need no stinkin calculations! We just make them really big!" Quote: Nelson Pass
  Reply With Quote
Old 8th April 2006, 12:10 PM   #13
lykkedk is offline lykkedk  Denmark
diyAudio Member
 
Join Date: Dec 2002
Location: Denmark, Fredericia
Send a message via MSN to lykkedk
Nice, I think it's more easy to find them at that voltage. Instead of 250V
__________________
/// got to catch up again ///
  Reply With Quote
Old 10th April 2006, 07:58 PM   #14
lykkedk is offline lykkedk  Denmark
diyAudio Member
 
Join Date: Dec 2002
Location: Denmark, Fredericia
Send a message via MSN to lykkedk
Hallo again.

I'am hoping to test my setup X-BoSoZ tomorrow, thuesday.
I will just make a shunt, instead of R14 (-in), and leave the rest, as it is, when using it 'unbalanced', just as I did with my (no'X')BoSoZ Right ?

I attached a picture, from stripping-off my old BoSoZ, assambling, the new PCB.

I will post, when I have tested, it (Hopefully tomorrow, or through Easter).
Attached Images
File Type: jpg ssl10037_600x.jpg (93.2 KB, 627 views)
__________________
/// got to catch up again ///
  Reply With Quote
Old 11th April 2006, 07:19 PM   #15
lykkedk is offline lykkedk  Denmark
diyAudio Member
 
Join Date: Dec 2002
Location: Denmark, Fredericia
Send a message via MSN to lykkedk
Succes

I Tested (only with headphones, PC-soundcard etc...) my new PCB aka X-BoSoZ, and it seem's to work.

If I leave the Input -LEFT IN / -RIGHT IN, as it is, I recieve, just small gain.
I'am not shure, if it's the right thing to do through, as I got the 10K R121 Resistor too. (Not there on normal BoSoZ). But seem's to work.
If I 'SHORT' R114 to GND, then I got 375mV/110mV (3,.409) : ~10,65 dB.

I hope i got the time listining to it, one of the next day's.

I attached some more picture's.

Please note the steenoe's cap
Attached Images
File Type: jpg 4.jpg (83.8 KB, 554 views)
__________________
/// got to catch up again ///
  Reply With Quote
Old 11th April 2006, 07:21 PM   #16
lykkedk is offline lykkedk  Denmark
diyAudio Member
 
Join Date: Dec 2002
Location: Denmark, Fredericia
Send a message via MSN to lykkedk
one more
Attached Images
File Type: jpg 3.jpg (97.6 KB, 577 views)
__________________
/// got to catch up again ///
  Reply With Quote
Old 11th April 2006, 07:50 PM   #17
steenoe is offline steenoe  Denmark
diyAudio Member
 
steenoe's Avatar
 
Join Date: Mar 2004
Quote:
Please note the steenoe's cap
Yep, thats the one Good work on that X-BosoZ, Jesper
Nice amps on your homepage.

Steen
  Reply With Quote
Old 11th April 2006, 07:56 PM   #18
lykkedk is offline lykkedk  Denmark
diyAudio Member
 
Join Date: Dec 2002
Location: Denmark, Fredericia
Send a message via MSN to lykkedk
Nice, thank you , will have to update my site, when i'am finishing my amp. Just looking forward, to listen to it...

My daughter, think's its sounding good.

Attached Images
File Type: jpg 1.jpg (85.9 KB, 574 views)
__________________
/// got to catch up again ///
  Reply With Quote
Old 12th April 2006, 07:46 PM   #19
lykkedk is offline lykkedk  Denmark
diyAudio Member
 
Join Date: Dec 2002
Location: Denmark, Fredericia
Send a message via MSN to lykkedk
I have plugged it in now, it sounds great, but I got a bit of 'humming' through.

I think, i remember, that i had the same 'humming' with my old, BoSoZ, when using INPUT pot - is it possible to attach the pot, to the OUT connection ??? on the X-BoSoZ ???

Regarding the sound. I think I can hear more details now, maybe the voice's is smoother too, it sounds at least just as good as the old one, that's for sure.

Thank you all

Maybe someone could help me, with my humming, or maybe it's just the temporarly wiring ??? (I dont' think it is)
__________________
/// got to catch up again ///
  Reply With Quote
Old 13th April 2006, 03:53 AM   #20
JDeV is offline JDeV  South Africa
diyAudio Member
 
Join Date: Oct 2002
Location: Cape Town
Quote:
Originally posted by lykkedk
I have plugged it in now, it sounds great, but I got a bit of 'humming' through.

I think, i remember, that i had the same 'humming' with my old, BoSoZ, when using INPUT pot - is it possible to attach the pot, to the OUT connection ??? on the X-BoSoZ ???

Regarding the sound. I think I can hear more details now, maybe the voice's is smoother too, it sounds at least just as good as the old one, that's for sure.

Thank you all

Maybe someone could help me, with my humming, or maybe it's just the temporarly wiring ??? (I dont' think it is)

Use my POT's on the input and got absolutely no hum at all. Do you gat proper earth connections and are the chassis earthed to the mains power supply from the wall outlet? (safety earth)
If you do use safety earth, try to disconnect it temporarily and see if hum disappears.
__________________
"Be carefull who's advice you buy, but be patient with those who supply it."
From Baz Luhrmann's - Everybody’s Free (To Wear Sunscreen)
  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
PPI A600 improvement manina Car Audio 7 3rd April 2009 03:16 AM
Poll! What do you use in your X-BOSOZ or BOSOZ for Volume Control and Input Selector? promitheus Pass Labs 87 19th February 2006 03:15 PM
First time caller, long time listener... smallangryboy Introductions 15 19th March 2005 08:10 PM
One more time, P3&P4 / BoSoZ tobias_svensk Pass Labs 3 5th March 2004 08:33 PM
X-bosoz vs. CCS X-bosoz, how does the sound compare? acliao Pass Labs 14 26th February 2004 12:55 AM


New To Site? Need Help?

All times are GMT. The time now is 02:04 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