F5 power amplifier - Page 1280 - 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 10th January 2013, 06:10 PM   #12791
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
probably you can use plain one , too

RTV Silicone is type used by all sort of mechanics , because is both temperature and oil resistive
Attached Images
File Type: jpg 0000_Permatex_High_Temp_RTV_Silicone_--.jpg (67.0 KB, 338 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 10th January 2013, 06:12 PM   #12792
labjr is offline labjr  United States
diyAudio Member
 
Join Date: Apr 2003
Location: MA
Arctic Silver Thermal Adhesive
  Reply With Quote
Old 10th January 2013, 06:25 PM   #12793
diyAudio Member
 
Blink_PT's Avatar
 
Join Date: Jul 2007
Location: Portugal
Quote:
Originally Posted by Zen Mod View Post
probably you can use plain one , too

RTV Silicone is type used by all sort of mechanics , because is both temperature and oil resistive
I know, I have a brother in law who has a workshop and I've seen him put a black silicone to seal the bearings. I'll stare at a tube
  Reply With Quote
Old 10th January 2013, 06:27 PM   #12794
Renron is offline Renron  United States
diyAudio Member
 
Renron's Avatar
 
Join Date: Jan 2007
Location: Sacramento
Quote:
Originally Posted by labjr View Post
Uh-oH, now you've done it. You're gonna hear about why you shouldn't use it....blah.....blah......blah. Conductive.........short out.........My F5 has it on the Mosfets for 4 year, I use it every day. NO problems. Not the adhesive btw
preferred straw color is red
__________________
"If it doesn't work properly, hope it catches on fire"- Nelson Pass @ BA3
"I fired up the prototype. Literally." The Prophet Pass.
  Reply With Quote
Old 13th January 2013, 05:19 PM   #12795
6L6 is offline 6L6  United States
diyAudio Member
 
6L6's Avatar
 
Join Date: Oct 2010
Location: Denver, Colorado
Guys with finished F5 -

Would someone with a scope (or really, really nice AC voltmeter) measure how much ripple you have on your rails?

I have 134mv peak to peak and curious if that's a lot or not bad.

I have a speaker hum and can't figure it out...
  Reply With Quote
Old 13th January 2013, 05:32 PM   #12796
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
usual procedure : words and pics , so we can figure out is it magnetic coupling or wiring deficiency
__________________
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 13th January 2013, 05:41 PM   #12797
diyAudio Member
 
oneplustwo's Avatar
 
Join Date: Apr 2009
Location: San Francisco
Quote:
Originally Posted by 6L6 View Post
Guys with finished F5 -

Would someone with a scope (or really, really nice AC voltmeter) measure how much ripple you have on your rails?

I have 134mv peak to peak and curious if that's a lot or not bad.

I have a speaker hum and can't figure it out...
With my fluke 45, I just measured 13mV on both positive and negative rails. So yours is 10 times worse....

For reference, I can hear a tiny bit of hum with my ear up against the speaker but not at all when farther than a foot or two away.
__________________
My Projects
  Reply With Quote
Old 13th January 2013, 05:58 PM   #12798
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
usual procedure : words and pics , so we can figure out is it magnetic coupling or wiring deficiency
Ok.

RCA jacks isolated from chassis. MAG here -

Click the image to open in full size.

PSU --> AMP --> speaker connections shown here

Click the image to open in full size.


Other than those photos, everything else as in this thread - all photos in top 2 posts.

An illustrated guide to building an F5
  Reply With Quote
Old 13th January 2013, 06:07 PM   #12799
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
grounded inputs - same reading ?

what's happening when you feed just one channel with present PSU ?
__________________
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 13th January 2013, 06:53 PM   #12800
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
Remove the -ve wire ( black ) to speaker from amplifier board , and connect it to power supply board ground .
  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
Rockford Fosgate Power 20001 bd amplifier power rating?? pachoorion Car Audio 8 8th May 2011 10:49 PM
Power transformers versus amplifier output power..what is your option? destroyer X Solid State 38 9th May 2009 05:23 PM
McIntosh Power Amplifier Power Guard johnnyrt Solid State 2 23rd August 2007 10:22 PM
Output power for a power amplifier Progg70 Solid State 33 10th September 2006 08:44 AM
Amplifier 3000 Wats Rms Power + Smps Higcht Power Bestiality MARAVILLASAUDIO Class D 1 5th November 2004 04:06 PM


New To Site? Need Help?

All times are GMT. The time now is 04:14 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