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Groups > sci.electronics.design > #460350 > unrolled thread
| Started by | "Dave M" <dgminala@mediacombb.net> |
|---|---|
| First post | 2017-05-15 09:49 -0500 |
| Last post | 2017-05-19 06:29 -0700 |
| Articles | 5 on this page of 45 — 20 participants |
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Using consumer-grade power amp as Power opamp "Dave M" <dgminala@mediacombb.net> - 2017-05-15 09:49 -0500
Re: Using consumer-grade power amp as Power opamp Don Y <blockedofcourse@foo.invalid> - 2017-05-15 08:09 -0700
Re: Using consumer-grade power amp as Power opamp "Dave M" <dgminala@mediacombb.net> - 2017-05-16 12:53 -0500
Re: Using consumer-grade power amp as Power opamp tabbypurr@gmail.com - 2017-05-17 03:04 -0700
Re: Using consumer-grade power amp as Power opamp mrdarrett@gmail.com - 2017-05-18 09:02 -0700
Re: Using consumer-grade power amp as Power opamp George Herold <gherold@teachspin.com> - 2017-05-15 08:18 -0700
Re: Using consumer-grade power amp as Power opamp Phil Allison <pallison49@gmail.com> - 2017-05-15 17:15 -0700
Re: Using consumer-grade power amp as Power opamp George Herold <gherold@teachspin.com> - 2017-05-16 05:49 -0700
Re: Using consumer-grade power amp as Power opamp "Dave M" <dgminala@mediacombb.net> - 2017-05-16 13:00 -0500
Re: Using consumer-grade power amp as Power opamp Jan Panteltje <pNa0nStpealmtje@yahoo.com> - 2017-05-15 15:57 +0000
Re: Using consumer-grade power amp as Power opamp John Larkin <jjlarkin@highlandtechnology.com> - 2017-05-15 09:02 -0700
Re: Using consumer-grade power amp as Power opamp Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> - 2017-05-15 09:03 -0700
Re: Using consumer-grade power amp as Power opamp Jan Panteltje <pNa0nStpealmtje@yahoo.com> - 2017-05-15 16:07 +0000
Re: Using consumer-grade power amp as Power opamp John Larkin <jjlarkin@highlandtechnology.com> - 2017-05-15 09:17 -0700
Re: Using consumer-grade power amp as Power opamp Jan Panteltje <pNa0nStpealmtje@yahoo.com> - 2017-05-15 16:46 +0000
Re: Using consumer-grade power amp as Power opamp John Larkin <jjlarkin@highland_snip_technology.com> - 2017-05-15 10:08 -0700
Re: Using consumer-grade power amp as Power opamp Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> - 2017-05-15 11:13 -0700
Re: Using consumer-grade power amp as Power opamp Clifford Heath <clifford.heath@gmail.com> - 2017-05-16 10:14 +1000
Re: Using consumer-grade power amp as Power opamp Jan Panteltje <pNa0nStpealmtje@yahoo.com> - 2017-05-16 08:36 +0000
Re: Using consumer-grade power amp as Power opamp Tim Wescott <seemywebsite@myfooter.really> - 2017-05-15 12:48 -0500
Re: Using consumer-grade power amp as Power opamp John Larkin <jjlarkin@highland_snip_technology.com> - 2017-05-15 11:18 -0700
Re: Using consumer-grade power amp as Power opamp Tim Wescott <tim@seemywebsite.really> - 2017-05-16 10:08 -0500
Re: Using consumer-grade power amp as Power opamp John Larkin <jjlarkin@highland_snip_technology.com> - 2017-05-16 11:19 -0700
Re: Using consumer-grade power amp as Power opamp George Herold <gherold@teachspin.com> - 2017-05-16 11:32 -0700
Re: Using consumer-grade power amp as Power opamp Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2017-05-16 16:02 -0400
Re: Using consumer-grade power amp as Power opamp John Larkin <jjlarkin@highlandtechnology.com> - 2017-05-16 20:19 -0700
Re: Using consumer-grade power amp as Power opamp Phil Allison <pallison49@gmail.com> - 2017-05-15 16:59 -0700
Re: Using consumer-grade power amp as Power opamp Chris Jones <lugnut808@spam.yahoo.com> - 2017-05-16 21:54 +1000
Re: Using consumer-grade power amp as Power opamp Phil Allison <pallison49@gmail.com> - 2017-05-16 06:06 -0700
Re: Using consumer-grade power amp as Power opamp tabbypurr@gmail.com - 2017-05-16 06:57 -0700
Re: Using consumer-grade power amp as Power opamp Winfield Hill <hill@rowland.harvard.edu> - 2017-05-15 18:42 -0700
Re: Using consumer-grade power amp as Power opamp krw@notreal.com - 2017-05-15 21:55 -0400
Re: Using consumer-grade power amp as Power opamp Winfield Hill <hill@rowland.harvard.edu> - 2017-05-16 05:53 -0700
Re: Using consumer-grade power amp as Power opamp Jan Panteltje <pNa0nStpealmtje@yahoo.com> - 2017-05-16 14:23 +0000
Re: Using consumer-grade power amp as Power opamp krw@notreal.com - 2017-05-16 12:28 -0400
Re: Using consumer-grade power amp as Power opamp "Kevin Aylward" <kevinRemovAT@kevinaylward.co.uk> - 2017-05-16 20:27 +0100
Re: Using consumer-grade power amp as Power opamp Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> - 2017-05-16 16:03 -0700
Re: Using consumer-grade power amp as Power opamp "Kevin Aylward" <kevinRemovAT@kevinaylward.co.uk> - 2017-05-17 19:34 +0100
Re: Using consumer-grade power amp as Power opamp Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> - 2017-05-17 11:47 -0700
Re: Using consumer-grade power amp as Power opamp Phil Allison <pallison49@gmail.com> - 2017-05-18 04:43 -0700
Re: Using consumer-grade power amp as Power opamp Jan Panteltje <pNa0nStpealmtje@yahoo.com> - 2017-05-18 16:30 +0000
Re: Using consumer-grade power amp as Power opamp John Larkin <jjlarkin@highland_snip_technology.com> - 2017-05-16 16:07 -0700
Re: Using consumer-grade power amp as Power opamp jurb6006@gmail.com - 2017-05-16 00:45 -0700
Re: Using consumer-grade power amp as Power opamp sroberts6328@gmail.com - 2017-05-18 08:57 -0700
Re: Using consumer-grade power amp as Power opamp George Herold <gherold@teachspin.com> - 2017-05-19 06:29 -0700
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| From | Jan Panteltje <pNa0nStpealmtje@yahoo.com> |
|---|---|
| Date | 2017-05-18 16:30 +0000 |
| Message-ID | <ofki79$1bca$1@gioia.aioe.org> |
| In reply to | #460596 |
On a sunny day (Tue, 16 May 2017 16:03:40 -0700) it happened Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote in <p71nhcpc8djf4im089o8js57gsg4q5ksuc@4ax.com>: >Try listening to class-D crap via hearing aids that are class-D :-( > >Class-D is for audiophools. Class D means interference. I have this, nice fan at the back, 19 inch rack: http://panteltje.com/pub/301734-an-01-ml-MCCRYPT_ENDSTUF_POWER_PA3000_de-en-fr-nl.pdf mixed languages. Good enough for the living room and street level. Was only 70 Euro at the time... It now seems there is a force in the EU, now that UK leaves EU, to move back towards French or German as the main language. I remember getting French lessons in kindergarten... History repeats itself. What the consequences are for 'the world' I don't know, and about units, we use a comma where the US uses a dot. 12,5 means 12 1/2 that gets tricky if one needs 12,997 gram. Will it ever be fixed? 1,999 percent distortion ;-)? Could be useful in marketing...
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| From | John Larkin <jjlarkin@highland_snip_technology.com> |
|---|---|
| Date | 2017-05-16 16:07 -0700 |
| Message-ID | <sg1nhc9358t89p6jbd3am2hk5ptmqt0p83@4ax.com> |
| In reply to | #460566 |
On Tue, 16 May 2017 20:27:57 +0100, "Kevin Aylward" <kevinRemovAT@kevinaylward.co.uk> wrote: >"Winfield Hill" wrote in message news:ofdleo02voc@drn.newsguy.com... > >Dave M wrote... >> Has anyone used any of the consumer-grade audio power amps ... > >>Sorry, but these days "consumer-grade audio power amps" >> are all class-D. In general most of these can perform as >> well as a linear amps. > >This, of course, depends on the colour of your ears, and their >reflectability... > I can make a fortune selling golden ear makeup. -- John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
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| From | jurb6006@gmail.com |
|---|---|
| Date | 2017-05-16 00:45 -0700 |
| Message-ID | <83181801-a664-4011-9581-0d88b36fbcef@googlegroups.com> |
| In reply to | #460350 |
I am having a hard time figuring out why anyone would want to do that. Just a simple circuit would be cheaper. Single ended, transistor or whatever fed by an OP AMP or even a comparator of discrete components.
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| From | sroberts6328@gmail.com |
|---|---|
| Date | 2017-05-18 08:57 -0700 |
| Message-ID | <5e1d72a3-2e8e-4942-ad39-aa464f7c77b1@googlegroups.com> |
| In reply to | #460350 |
On Monday, May 15, 2017 at 10:49:56 AM UTC-4, Dave M wrote: > Has anyone used any of the consumer-grade audio power amps such as the > LM1825, TDA2030, or TDS7297 as a basic DC power opamp? > Any reason they shouldn't be used as power supply regulators, TEC > controllers, etc? > > Dave M As long as you configure it as a inverting opamp with a gain of 20 or more, LM3886 is one big op-amp that works down to DC. We have them in some mechanical servo systems that need a DC to 2500 Hz response and +/- 12V of drive. . I'm driving 3 ohm and 7 ohm coils with them, no problems. Must use a split rail, we use +/- 24 volt rails. Steve
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| From | George Herold <gherold@teachspin.com> |
|---|---|
| Date | 2017-05-19 06:29 -0700 |
| Message-ID | <3b6e2fe7-bb17-4c87-9c69-cf99c192aa74@googlegroups.com> |
| In reply to | #460788 |
On Thursday, May 18, 2017 at 11:58:01 AM UTC-4, srober...@gmail.com wrote: > On Monday, May 15, 2017 at 10:49:56 AM UTC-4, Dave M wrote: > > Has anyone used any of the consumer-grade audio power amps such as the > > LM1825, TDA2030, or TDS7297 as a basic DC power opamp? > > Any reason they shouldn't be used as power supply regulators, TEC > > controllers, etc? > > > > Dave M > > As long as you configure it as a inverting opamp with a gain of 20 or more, LM3886 is one big op-amp that works down to DC. We have them in some mechanical servo systems that need a DC to 2500 Hz response and +/- 12V of drive. . I'm driving 3 ohm and 7 ohm coils with them, no problems. Must use a split rail, we use +/- 24 volt rails. > > Steve Interesting thanks. Are those air coils? How bad is the crossover distortion. I use LM675 for ~10 ohm/1 amp coils. I tried some power opamps (OPA544) and the crossover was worse. No (zobel) compensation network. George H.
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