SYMEF amplifier - Page 32 - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

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 3rd March 2012, 03:00 PM   #311
diyAudio Member
 
Join Date: Oct 2011
Thanks for joining the quest Nikosokey, I do hope you have a great time
  Reply With Quote
Old 3rd March 2012, 03:03 PM   #312
diyAudio Member
 
Join Date: Oct 2011
Hi Janneman,

I am hoping you will join us. You have many years of experience, but one never knows what they will find out here, your contribution to the state of the art will be highly appreciated

kind regards,

Harrison.

Last edited by OnAudio; 3rd March 2012 at 03:07 PM. Reason: typo
  Reply With Quote
Old 3rd March 2012, 03:51 PM   #313
diyAudio Member
 
Join Date: Oct 2011
Default 30k mark

In-order for me to get closer to the 30k mark for data analysis, I need this threads resident engineers (such as Joel and Paul among others)to show case their amplifiers at their cities audio events and email me the data.

I also need volunteers from those who will be attending burning amp 2012 and are willing to show case their SYMEF to do so.

Cheers
  Reply With Quote
Old 4th March 2012, 12:32 PM   #314
PauloPT is offline PauloPT  Portugal
diyAudio Member
 
Join Date: Jan 2010
Location: Lisboa, Portugal
Send a message via MSN to PauloPT
Whould it be of any value bypassing the 33uF caps with some small say 100nF polypropylene films?
__________________
Kind Regards,
Paulo.
  Reply With Quote
Old 5th March 2012, 05:45 AM   #315
diyAudio Member
 
Join Date: Aug 2009
Default about polypropylene...

I recommended it only for signal path.33uf is decoupling capacitor and has to do with the supply of the amp.

regards,
joel
  Reply With Quote
Old 5th March 2012, 08:20 AM   #316
PauloPT is offline PauloPT  Portugal
diyAudio Member
 
Join Date: Jan 2010
Location: Lisboa, Portugal
Send a message via MSN to PauloPT
I know 33uF is for decoupling. I see in many amps decoupling electrolytic caps bypassed with small film caps. It's good to bypass or not?
__________________
Kind Regards,
Paulo.
  Reply With Quote
Old 5th March 2012, 08:32 AM   #317
diyAudio Member
 
Join Date: Aug 2009
Default to my knowldge....

Purpose of 2 additional electrolytics as decoupling is used for vas stage and the input stage.to provide better psrr and as you can see they have separate ground returns.if you still want to put it used ceramics much cheaper and effective.

regards,
joel
  Reply With Quote
Old 5th March 2012, 11:53 AM   #318
PauloPT is offline PauloPT  Portugal
diyAudio Member
 
Join Date: Jan 2010
Location: Lisboa, Portugal
Send a message via MSN to PauloPT
Quote:
put it used ceramics much cheaper and effective.
Ceramics ind audio, isn't that an heresy?

The idea behind this is that high frequencies take the film cap path - better quality than any electrolytic -, and the bass doesn't mind the electrolytic. Some people always bypass electrolytics others say it can give rise to nasty ressonances.
For instance, in the power supply do you use to put a film cap after the reservoir electrolytics? I used to do it but now I'm not sure anymore.
__________________
Kind Regards,
Paulo.
  Reply With Quote
Old 5th March 2012, 12:06 PM   #319
diyAudio Member
 
Join Date: Aug 2009
Default decoupling cap.

This is where the decoupling capacitor comes in. The decoupling capacitor works as the device’s local energy storage. The capacitor cannot provide DC power because it stores only a small amount of energy but this energy can respond very quickly to changing current demands.

regards,
joel
  Reply With Quote
Old 5th March 2012, 01:50 PM   #320
PauloPT is offline PauloPT  Portugal
diyAudio Member
 
Join Date: Jan 2010
Location: Lisboa, Portugal
Send a message via MSN to PauloPT
Yes, I know that. I was looking at the issue with the filter point of view. Highs => small film cap , bass => big electrolytic .
__________________
Kind Regards,
Paulo.
  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
Wanted: DIY amplifier builder with experience. I need a 0.7 ohm stable amplifier Audiophilenoob Swap Meet 34 16th May 2005 11:58 PM
Questions about how to decrease the PASS A-40 amplifier into a class AB amplifier. novtango Pass Labs 2 21st October 2002 01:50 AM


New To Site? Need Help?

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