Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Solid State Talk all about solid state amplification.

"The Wire AMP" Class A/AB Power Amplifier based on the LME49830 with Lateral Mosfets
"The Wire AMP" Class A/AB Power Amplifier based on the LME49830 with Lateral Mosfets
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 4th May 2012, 08:53 AM   #1061
TheShaman is offline TheShaman  Europe
diyAudio Member
 
Join Date: Jan 2007
Quote:
Originally Posted by qusp View Post
@The Shaman: if you are reading mate, did you end up getting any result with the DPS600? i'm probably looking more at the dps500 or 600 for woofers and the 400 for the other amps be they mid-woofers or tweeters depending on where the LPUHP ends up
Still waiting on AudioPower to ship the supplies.
The first part of the order (6 supplies) is supposed to be boxed up and ready (they even sent me pics) but have been waiting on UPS to collect for over a week now.
I've been told the second part of the order (another 10 supplies) were boxed up last night.

Time will tell.
__________________
"You have a hierarchy: a mathematician, a physicist (which is a failed mathematician), and an engineer (which is a failed physicist)." - Andrew Jones
  Reply With Quote
Old 4th May 2012, 08:55 AM   #1062
qusp is offline qusp  Australia
diyAudio Member
 
qusp's Avatar
 
Join Date: Oct 2009
Location: Brisbane, Australia
ok, well sounds like theres some progress at least, at least they might be able to ship together given the UPS delay?
  Reply With Quote
Old 4th May 2012, 09:04 AM   #1063
TheShaman is offline TheShaman  Europe
diyAudio Member
 
Join Date: Jan 2007
That's up to them. Frankly, at this point I'd be happy even if they send the first part of the order.
__________________
"You have a hierarchy: a mathematician, a physicist (which is a failed mathematician), and an engineer (which is a failed physicist)." - Andrew Jones
  Reply With Quote
Old 4th May 2012, 10:01 AM   #1064
AP2 is offline AP2  Italy
Banned
 
Join Date: Dec 2009
Location: Italy
Hi all,
I apologize for the problem, the main delay (I refer to the version / DA of the DPS-600) is linked to the external manufactory for the power-unit , right in this new version (now in stock). there are no problems for the standard version of the DPS-600 (the same as that sent to Owen, but with regulators, including, for drivers vcc) and remote control 2Pin
It is not easy to hear Owen, this can be a problem that extends the time.

Regards
  Reply With Quote
Old 4th May 2012, 06:37 PM   #1065
TrickyMicky is offline TrickyMicky  United Kingdom
diyAudio Member
 
Join Date: Nov 2007
Quote:
Originally Posted by blueskix View Post
Hi Owen,

This works for me
Best Regards,
Steve
Works for me too.
  Reply With Quote
Old 7th May 2012, 07:14 PM   #1066
FloridaBear is offline FloridaBear
diyAudio Member
 
Join Date: Aug 2011
Just received my package today (Monday, 5/7) in Florida, USA. Looks like everything is there. Time to heat up the soldering iron!
  Reply With Quote
Old 8th May 2012, 09:17 PM   #1067
opc is offline opc  Canada
diyAudio Member
 
opc's Avatar
 
Join Date: Oct 2004
Location: Ottawa, Ontario, Canada
"The Wire AMP" Class A/AB Power Amplifier based on the LME49830 with Lateral Mosfets
Hi Guys,

Now that people have everything they need to start building, I have a few goodies to post up regarding bias settings and the SMPS I've measured.

I'll start with bias. I took a whole pile of distortion and distortion product ratio (DPR) measurements at various different bias levels. This way, each individual user can make their own decisions about what levels to bias at.

Here's the test setup:

Amp setup = SE
PSU = DPS400 with PBTU
+/- 52VDC on Mosfets
+/- 64V on LME
Bias levels from 25mA to 1A.
Gain = 28dB
Input = 225mV RMS
Output = 3.9W
Load = 8 ohms

The first set of attached images show the distortion product ratio at different bias currents.

Overall bias levels are (in order):

25mA
50mA
100mA
150mA
200mA
250mA
300mA
350mA
400mA
500mA
600mA
700mA
800mA
900mA
1000mA
Attached Images
File Type: png Distortion Product Ratio 25mA.png (48.2 KB, 561 views)
File Type: png Distortion Product Ratio 50mA.png (47.8 KB, 541 views)
File Type: png Distortion Product Ratio 100mA.png (47.4 KB, 535 views)
File Type: png Distortion Product Ratio 150mA.png (47.1 KB, 526 views)
File Type: png Distortion Product Ratio 200mA.png (46.7 KB, 518 views)
File Type: png Distortion Product Ratio 250mA.png (46.8 KB, 89 views)
File Type: png Distortion Product Ratio 300mA.png (46.7 KB, 98 views)
File Type: png Distortion Product Ratio 350mA.png (46.5 KB, 94 views)
File Type: png Distortion Product Ratio 400mA.png (46.9 KB, 81 views)
File Type: png Distortion Product Ratio 500mA.png (47.1 KB, 137 views)

Last edited by opc; 8th May 2012 at 09:21 PM.
  Reply With Quote
Old 8th May 2012, 09:20 PM   #1068
opc is offline opc  Canada
diyAudio Member
 
opc's Avatar
 
Join Date: Oct 2004
Location: Ottawa, Ontario, Canada
"The Wire AMP" Class A/AB Power Amplifier based on the LME49830 with Lateral Mosfets
And here are the rest:
Attached Images
File Type: png Distortion Product Ratio 600mA.png (46.2 KB, 134 views)
File Type: png Distortion Product Ratio 700mA.png (46.4 KB, 70 views)
File Type: png Distortion Product Ratio 800mA.png (46.3 KB, 49 views)
File Type: png Distortion Product Ratio 900mA.png (46.5 KB, 48 views)
File Type: png Distortion Product Ratio 1000mA.png (46.8 KB, 86 views)
  Reply With Quote
Old 8th May 2012, 11:01 PM   #1069
opc is offline opc  Canada
diyAudio Member
 
opc's Avatar
 
Join Date: Oct 2004
Location: Ottawa, Ontario, Canada
"The Wire AMP" Class A/AB Power Amplifier based on the LME49830 with Lateral Mosfets
Next up I've got the actual THD+N expressed as a percentage for each bias level.

Same order as last time, but the 900mA measurement is omitted. The only relevant channel is CH3. The other two are disconnected.

Keep in mind that these are THD+N measurements, and as a result they stay about the same at higher bias levels even though the distortion continues to drop if you look at the DPR graphs. This is a sign that the noise levels are becoming dominant at higher bias levels as the distortion starts to drop below the noise floor of the amp with this supply.
Attached Images
File Type: png THD+N 225mV 8R - 25mA.png (65.2 KB, 110 views)
File Type: png THD+N 225mV 8R - 50mA.png (65.5 KB, 86 views)
File Type: png THD+N 225mV 8R - 100mA.png (64.8 KB, 53 views)
File Type: png THD+N 225mV 8R - 150mA.png (64.8 KB, 59 views)
File Type: png THD+N 225mV 8R - 200mA.png (64.3 KB, 54 views)
File Type: png THD+N 225mV 8R - 250mA.png (64.7 KB, 64 views)
File Type: png THD+N 225mV 8R - 300mA.png (64.4 KB, 73 views)
File Type: png THD+N 225mV 8R - 350mA.png (62.9 KB, 74 views)
File Type: png THD+N 225mV 8R - 400mA.png (63.5 KB, 76 views)
File Type: png THD+N 225mV 8R - 500mA.png (61.8 KB, 92 views)
  Reply With Quote
Old 8th May 2012, 11:03 PM   #1070
opc is offline opc  Canada
diyAudio Member
 
opc's Avatar
 
Join Date: Oct 2004
Location: Ottawa, Ontario, Canada
"The Wire AMP" Class A/AB Power Amplifier based on the LME49830 with Lateral Mosfets
and the last few:
Attached Images
File Type: png THD+N 225mV 8R - 600mA.png (63.2 KB, 89 views)
File Type: png THD+N 225mV 8R - 700mA.png (63.3 KB, 63 views)
File Type: png THD+N 225mV 8R - 800mA.png (61.8 KB, 60 views)
File Type: png THD+N 225mV 8R - 1000mA.png (62.9 KB, 87 views)
  Reply With Quote

Reply


"The Wire AMP" Class A/AB Power Amplifier based on the LME49830 with Lateral MosfetsHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Marriage from "ZEN" - and ordinary class AB topology about HCA - why not realized ?? tiefbassuebertr Pass Labs 2 4th January 2014 04:52 PM
X-Amp (LME49830 + Exicon Lateral Mosfets) danfo098 Chip Amps 28 14th October 2013 04:05 AM
"CA-10", new Single Ended Power amp Device based on Aleph or ZEN ? tiefbassuebertr Pass Labs 1 29th September 2010 06:55 PM
Compound Lateral FET for higher power Class AB amp. Mooly Solid State 17 22nd August 2010 02:13 PM
Improvments to "Tube Headphone Amplifier/Preamp with Relay-Based Input and Power Swi" kipman725 Headphone Systems 4 17th August 2009 06:12 PM


New To Site? Need Help?

All times are GMT. The time now is 06:37 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio
Wiki