1DIFFQC amplifier - Page 4 - 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 16th September 2012, 08:52 PM   #31
diyAudio Member
 
Nico Ras's Avatar
 
Join Date: Nov 2005
Location: East Coast of South Africa
Quote:
Originally Posted by evette View Post
Hello Mr.Nico Ras, first of all I should explain that this 1 channel was built using all junk parts that were collected over many years you know old tv sets radios anything I couls salvage. I haven,t collected information from others or mr. harrison. Nor have I read any power supply thread. The changes I made werte because I wanted to really open this amp up,,The pcb,s that Mr. Harrison was so kind to give to me I felt that he had given me the tools to begin with so I simply took it to the next level. Evette
Thank you for your honesty and opinion Evette
__________________
Kindest regards
Nico
  Reply With Quote
Old 16th September 2012, 11:20 PM   #32
diyAudio Member
 
Kindhornman's Avatar
 
Join Date: Aug 2012
Location: Los Angeles, California
Harrison,
A couple of questions for you or anyone else. I found a discrepancy between another part number on the BOM, C3 & C12 are supposed to be 33uF capacitors. The parts I received are 47uF instead and read as part # PLV1J470MDL1TD. I am coming up with UEP1J330MPD-ND but not sure if this is correct? What should the correct number be. Also I ended up with the wrong fuse holders for the boards. Does anyone have the part number for the correct parts? Otherwise I am close to completing the boards, just wondering if I am going to change the output transistors to what Evette is using..... Haven't built the power supply so it would be a perfect time to change devices. I am thinking that with the devices Evette is using the output power is also increasing, is that correct or is it just running on a higher voltage?

Last edited by Kindhornman; 16th September 2012 at 11:35 PM.
  Reply With Quote
Old 17th September 2012, 04:45 AM   #33
diyAudio Member
 
Join Date: Oct 2011
Quote:
Originally Posted by evette View Post
This amp can really swing the current. Evette
I was waiting for you to say that It packs a punch.
__________________
www.harrisonaudiolabs.com
  Reply With Quote
Old 17th September 2012, 04:48 AM   #34
diyAudio Member
 
Join Date: Oct 2011
Quote:
Originally Posted by Kindhornman View Post
Harrison,
A couple of questions for you or anyone else. I found a discrepancy between another part number on the BOM, C3 & C12 are supposed to be 33uF capacitors. The parts I received are 47uF instead and read as part # PLV1J470MDL1TD. I am coming up with UEP1J330MPD-ND but not sure if this is correct? What should the correct number be.
Yes use the 47 uf. Did not find the 33 uf with the specs needed.
__________________
www.harrisonaudiolabs.com
  Reply With Quote
Old 17th September 2012, 06:12 PM   #35
diyAudio Member
 
Join Date: Oct 2011
Quote:
Originally Posted by evette View Post
Hello Everybody,, A quick update 1-on the first channel that I builded I used TIP142 transistors I enjoyed the sound very much my supply was at 37-+ volts. Then I try Changing my outputs and I used another suppy 45-+ The outputs are now MJH6284
Now this amp has come alive The bass takes you to the center of the earth and the highs put you on cloud 9. You,ll end up listening to your whole collection of music again.
Quote:
Originally Posted by evette View Post
If You built anything in life Please put this amp on top of your list. Evette
Quote:
Originally Posted by evette View Post
IThis amp t,s 33K per rail. This amp can really swing the current. Evette
Hi Evette,

A friend of mine in Seattle would like to listen to your amp. Or you could make him one as he cannot assemble PM me.
__________________
www.harrisonaudiolabs.com
  Reply With Quote
Old 17th September 2012, 06:29 PM   #36
diyAudio Member
 
Kindhornman's Avatar
 
Join Date: Aug 2012
Location: Los Angeles, California
Harrison that is a pretty long distance to hear those amps, Washington to Canada... But perhaps Sarah Pallin could hear over that distance, she could probably see your house from hers......
  Reply With Quote
Old 17th September 2012, 06:38 PM   #37
diyAudio Member
 
Kindhornman's Avatar
 
Join Date: Aug 2012
Location: Los Angeles, California
Evette,
I looked on the site for those mjh6284 transistors and I assume that you had the earlier case configuration. The ones that are available as of June of this year are different but I am not sure that it would make any difference? Is the case the only difference and is the heat transfer going to be affected by the larger case on the device? I'm a babe in the woods on understanding all the factors of choosing a power transistor and I can see the Darlington circuit in the schematics but I will need to read much more before I would know one designs advantage over another. I am counting on the smart people here to steer me right. The more clean power I can get out of the design the better as I am working with loudspeakers with great frequency response and low efficiency of about 86db at 1 watt and 4 ohms. I also have the same in an 8 ohm voicecoil but the efficiency is about identical with the change of impedance as the weight of the voicecoil makes them about even.

Steven
  Reply With Quote
Old 17th September 2012, 06:55 PM   #38
diyAudio Member
 
Join Date: Oct 2011
Quote:
Originally Posted by Kindhornman View Post
But perhaps Sarah Pallin could hear over that distance, she could probably see your house from hers......
.

A lot of members are missing out because they cannot assemble these amplifiers. They would prefer modules or complete builds. I welcome constructive ideas on how to fix this Inorder for me to focus on research rather than these issues I need partners
__________________
www.harrisonaudiolabs.com

Last edited by OnAudio; 17th September 2012 at 07:09 PM.
  Reply With Quote
Old 17th September 2012, 08:24 PM   #39
diyAudio Member
 
Kindhornman's Avatar
 
Join Date: Aug 2012
Location: Los Angeles, California
I understand Harrison. I am in the middle of a beryllium dome tweeter development project and what am I doing building an amplifier? But I am learning so it is worth much to me in that regards.

Not to be racist in the least. but Chinese hands would build it cheaper than all the rest of us are going to do this for.......
  Reply With Quote
Old 17th September 2012, 09:01 PM   #40
diyAudio Member
 
Join Date: Oct 2011
Quote:
Originally Posted by Kindhornman View Post
I am in the middle of a beryllium dome tweeter development project and what am I doing building an amplifier? But I am learning so it is worth much to me in that regards.
The universe has many mysteries, could it be possible that the success of the tweeter will be hinged on that amplifier <joking>
__________________
www.harrisonaudiolabs.com
  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
Hypex SMPS400 + 2x UCD180 wiring (DC error, Auto Amplifier Enable, Amplifier Standby) maxw Class D 12 2nd December 2013 08:46 PM
Burning Amplifier 2012 Nominee 1DIFFQC OnAudio Pass Labs 9 31st October 2012 01:25 PM
An amplifier to take to University - A small low power integrated amplifier monty78pig Solid State 33 31st August 2012 06:00 AM
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 06:21 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