TPA3116D2 Amp - Page 250 - diyAudio
Go Back   Home > Forums > Amplifiers > Class D

Class D Switching Power Amplifiers and Power D/A conversion

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 30th March 2014, 04:55 PM   #2491
diyAudio Member
 
Join Date: Nov 2005
Try the ferrites for two weeks. Then switch back. You might find the ferrites were not the right choice.

I've yet to hear anything that actually sounded better with them, for any purpose. I know it's harsh and hard-lined, but seriously I always go back to without.
  Reply With Quote
Old 30th March 2014, 05:02 PM   #2492
diyAudio Member
 
Join Date: Jan 2014
Did anyone have success with eliminating the anti-pop or anti-bump on the red JY board on turn-on? I placed a capacitor from the mute pin to the ground on the power input and that seemed to work but isn't very pretty.

Yesterday I tried the method proposed on page 172, see image below and the ground point suggested, using a 10uf 50v capacitor and it didn't work. This is a way cleaner way to mod the board so hoping there's another solution like this.

Or rather how do I locate a ground point on the board closer to the mute pin?

Click the image to open in full size.
Click the image to open in full size.
  Reply With Quote
Old 30th March 2014, 05:10 PM   #2493
diyAudio Member
 
Join Date: Feb 2008
Location: Chicago, Illinois, USA
Can anyone with a blue YJ board confirm if their board produces a "hiss" with no inputs connected? I'm wondering if this is a "feature" of the board itself, or if mine is "special".

Thanks!
  Reply With Quote
Old 30th March 2014, 05:52 PM   #2494
Jogi is offline Jogi  Germany
diyAudio Member
 
Join Date: Jan 2008
Yup, I have 2 of those and both show noise, even with preamp connected. Only when the pre is switched on, noise disappears.
I tried 100k resistors from input to ground, but nothing changed.
Lets call it a feature then
Probably that is the reason for the lower price.
  Reply With Quote
Old 30th March 2014, 07:07 PM   #2495
xrk971 is offline xrk971  United States
diyAudio Member
 
xrk971's Avatar
 
Join Date: Oct 2012
Location: Virginia
Any amp with high impedance inputs connected to non powered sources will pick up noise or produce hiss because it is either ungrounded or not live in order to provide some input source impedance. I don't think it's unusual for the tpa3116 to do this. With preamp turned on the hiss is only audible with your ear next to the driver right?
  Reply With Quote
Old 30th March 2014, 07:12 PM   #2496
Lo_Tse is offline Lo_Tse  Canada
diyAudio Member
 
Join Date: Dec 2006
Quote:
Originally Posted by Octavia View Post
Thanks LoTse, I kept thinking their must be a better price performance choice than $$$ Goldpoints.
Your are welcome.

I have to admit though, the first time I looked at its picture, I "felt in love" with the Goldpoint attenuator. it looked so solidly built and all the joints are meticulously made. However, I just cannot afford it.

One see quite a number of those blue/green atenuators (usually ladder/serial type) that uses 1% resistors on EBay. The quality of the workmanship varies. Nevertheless, I read that they usually work fine. However, the stereo ones are quite bulky and take up a lot of space. The one on this link is quite compact and should fit nicely in the small chasis that I planned for my next 3116. By the way, in this website, they also has the same attenuators that have connecting wires soldered to the attachment points so they can be placed onto the PCB directly (some people like it, some don't).

Regards,

Regards,
  Reply With Quote
Old 30th March 2014, 07:39 PM   #2497
BL21DE3 is offline BL21DE3  Scotland
diyAudio Member
 
BL21DE3's Avatar
 
Join Date: May 2004
Location: Saffron Walden
Quote:
Originally Posted by Lo_Tse View Post

I have to admit though, the first time I looked at its picture, I "felt in love" with the Goldpoint attenuator. it looked so solidly built and all the joints are meticulously made. However, I just cannot afford it.
The Goldpoints are quite stunning, but like you I can't justify spending that much on a volume control. Whereas ~7 on the one in your Aliexpress link was easier to justify. Thanks agin for bringing it to my attention, I'm looking forward to giving it a go with my YJ blue board.
  Reply With Quote
Old 30th March 2014, 08:16 PM   #2498
diyAudio Member
 
Join Date: Mar 2014
Quote:
Originally Posted by BL21DE3 View Post
Can anyone recommend a reasonably priced 50K pot to go with the YJ blue board? I'm currently using a 100K Alps blue from my spare parts box, which is probably not ideal as the majority of TPA3116 boards use 50K pots.
http://www.digikey.com/product-search/en?vendor=0&keywords=p2g1503-nd
another option. This is another that has been getting tossed around for quality and price.
  Reply With Quote
Old 30th March 2014, 08:26 PM   #2499
diyAudio Member
 
Join Date: Mar 2014
I'm a little confused by the acceptance of a hiss when not plugged into a source. With everyone cheering the merits of this board and also talking about just leaving it plugged in all the time. Does that mean your speakers are constantly hissing or do you just leave it plugged into something? I will be running mine off of my phone so I can't just leave it there. I'm assuming the hiss isn't supposed to be there and can be gotten rid of? I'm really just guessing as this is all really new to me.

I got my blue board hooked up last night and the noise before plugging my phone into it was awful. Sounded like a broken guitar amp or something. I assume that is from not having shielded cables yet or a poor soldering job on the wires from me.

On a side note. It had absolutely no problem driving my 8" 4ohm event 20/20's.
The rap sounded particularly awesome.

On full volume (direct from phone, no pot so not as loud) for about 20 minutes the amp started cutting out. The heat sink was almost too hot to touch.
  Reply With Quote
Old 30th March 2014, 09:21 PM   #2500
diyAudio Member
 
wushuliu's Avatar
 
Join Date: May 2008
Location: Los Angeles
Quote:
Originally Posted by flavo cadillac View Post
I'm a little confused by the acceptance of a hiss when not plugged into a source. With everyone cheering the merits of this board and also talking about just leaving it plugged in all the time.
Why wouldn't your source be plugged in all the time. That's just normal. Having a preamp with multiple inputs even more normal.
  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
FS- Twisted Pear Buffalo 32S Board & System New & Unused secretriches Swap Meet 1 10th August 2009 02:17 PM
Modify & build out (2) Western Electric 300B / 2A3 Hammond monoblock amps & UTC LS-5 quality sound Tubes / Valves 0 9th May 2009 03:59 PM
Krell KSA 80 bias & dc offset check & adjust procedure Clouseaupte Solid State 3 9th August 2007 09:39 AM
DIY-AMP <ZAS> Low THD & IM high bandwith murphy Solid State 18 30th December 2005 10:28 AM


New To Site? Need Help?

All times are GMT. The time now is 02:08 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