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

Chip Amps Amplifiers based on integrated circuits

Compact Sized LME49810/11 +ThermalTrak Amp
Compact Sized LME49810/11 +ThermalTrak Amp
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 15th February 2018, 09:51 PM   #311
indianajo is offline indianajo  United States
diyAudio Member
 
indianajo's Avatar
 
Join Date: Jan 2010
Location: Jeffersonville, Indiana USA
I got 24 of the last LME49810 but thought at the time thermal trak transistors were discontinued (just the complement of the NJL4281 I had already was). Now no boards are available. I guess I'll have to become a board designer. Like tom and telstar I'd like at least two pairs of TO247 or TO-3P transistors.
__________________
Dynakit ST70, ST120, PAS2,Hammond H182(2 ea),H112,A100,10-82TC,Peavey CS800S,1.3K, SP2-XT's, T-300 HF Proj's, Steinway console, Herald RA88a mixer, Wurlitzer 4500, 4300
  Reply With Quote
Old 15th February 2018, 10:25 PM   #312
Telstar is offline Telstar  Italy
diyAudio Member
 
Join Date: Dec 2007
Location: Italy
There are a few (maybe one) chinese design for sale on aliexpress and amazon with 3 pairs i think. This is not the proper thread to link.
But I'm sure Tom design with the old 3886 is of better quality.
__________________
"The response of the inner ear extends to at least 200khz" Dr W. Tempest
  Reply With Quote
Old 17th October 2018, 08:40 PM   #313
josoeff is offline josoeff  Europe
diyAudio Member
 
Join Date: Mar 2006
Location: Dreieich
Hi Panson

Just finished to of the compact size boards, they sound good -thanks for your work!!
However, I have a problem with the quiescent current. Between test point one and test point two only 8 mV are measured and above the 180 ohm resistor only 1.08 volts. The trimming pot is completely turned out (open). Do you recommend the change of certain values? The boards run at 2 x 44 volts.
  Reply With Quote
Old 17th October 2018, 09:07 PM   #314
josoeff is offline josoeff  Europe
diyAudio Member
 
Join Date: Mar 2006
Location: Dreieich
Hi Panson
I made a mistake, between R12 and R22 (both bridged) I measure around 490 ohms -so the 500 R pot is closed. I conclude that changing the trim pot to a higher value would allow the adjustment of the desired quiescent current - is that correct?
Regards, Jo
  Reply With Quote

Reply


Compact Sized LME49810/11 +ThermalTrak AmpHide 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
On Semi ThermalTrak davidallancole Solid State 639 1st May 2013 03:29 AM
LME49810 plus ThermalTrak single-board layout panson_hk Chip Amps 1 28th September 2009 11:57 AM
LME49810 W/ Thermaltrak CFP Output BarryJF02 Chip Amps 6 13th September 2009 01:23 AM
OnSemi ThermalTrak Arius Solid State 8 26th August 2005 05:09 PM
In search for a compact sized motorized pot yairf Parts 1 19th October 2004 03:56 PM


New To Site? Need Help?

All times are GMT. The time now is 08:55 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki