Electronics Lab Philippines

Leach Low TIM Amplifier V4.5

Offline Engr. Dacuycoy

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Leach Low TIM Amplifier V4.5
« on: October 07, 2010, 08:57:33 PM »

If there is enough demand I will post the Layout with new trannies except for the output.
I'm a Mechanically trained, electronic to me is just an hobby and if I can do it, so can you!
Don't get discouraged by those so called "EXPERT"! I can tell you most of the time they "TALK" only but with no practical results.
Seldom people succeed the first time, just keep on trying!

Offline jiggins20

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Re: Leach Low TIM Amplifier V4.5
« Reply #1 on: October 08, 2010, 10:50:04 AM »
cge po post nyo na...
Audio amp addict

Offline electronic repairer

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Re: Leach Low TIM Amplifier V4.5
« Reply #2 on: October 09, 2010, 10:15:14 AM »
Cge engr. post niyo na yan...

para mapagaralan naman natin..

thanks in advance..

Patience is the best attitude of an electronic repairer.

Offline Engr. Dacuycoy

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Re: Leach Low TIM Amplifier V4.5
« Reply #3 on: October 09, 2010, 05:17:10 PM »
I'm a Mechanically trained, electronic to me is just an hobby and if I can do it, so can you!
Don't get discouraged by those so called "EXPERT"! I can tell you most of the time they "TALK" only but with no practical results.
Seldom people succeed the first time, just keep on trying!

Offline kulapo

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Re: Leach Low TIM Amplifier V4.5
« Reply #4 on: November 09, 2010, 09:35:50 PM »
ok to a, napag aralan ko na mga detalye, problema lang yung availability ng transistor parts except output trannies... ??? engr.kumusta yung new substitute trannies natin dyan ok naba? ;D

Offline electronic repairer

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Re: Leach Low TIM Amplifier V4.5
« Reply #5 on: November 10, 2010, 08:24:01 AM »
ilabas mo na engr. yung mga substitute sa trannies..
Patience is the best attitude of an electronic repairer.

Offline tony

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Re: Leach Low TIM Amplifier V4.5
« Reply #6 on: December 01, 2010, 08:16:07 AM »
@engineer, sent you email......are you offering boards as in "group buy"? if so you can count me in for 4 boards, possibly more depending on price....
* you simulate a circuit because you know how it works and wants to tweak, not because you want to learn how that circuit works....simulations do not teach you to be circuit smart...it comes with experience....
*http://www.diyaudio.com/forums/power-supplies/191730-tonys-latest-traffo-diy-build-15.html#post4375385
*do not judge any amp by its schematics, drawing lang yon, look instead at the finished amp, it tells a lot about the amp and its builder.....
http://ronelex.com/bias-current-output-transistor-amplifier/156

Offline tony

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Re: Leach Low TIM Amplifier V4.5
« Reply #7 on: December 01, 2010, 08:28:39 AM »
* you simulate a circuit because you know how it works and wants to tweak, not because you want to learn how that circuit works....simulations do not teach you to be circuit smart...it comes with experience....
*http://www.diyaudio.com/forums/power-supplies/191730-tonys-latest-traffo-diy-build-15.html#post4375385
*do not judge any amp by its schematics, drawing lang yon, look instead at the finished amp, it tells a lot about the amp and its builder.....
http://ronelex.com/bias-current-output-transistor-amplifier/156

Offline Engr. Dacuycoy

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Re: Leach Low TIM Amplifier V4.5
« Reply #8 on: December 01, 2010, 12:51:18 PM »
it's nice to see you here sir tony. thanks for the email... in a few days i will post the old version of V4.5 then the 3 pairs version and 6 pairs version. for the 3 and six pairs version we need to calculate the resistor of the protection circuit and i need the expertice of our audio pro's and practioners.
I'm a Mechanically trained, electronic to me is just an hobby and if I can do it, so can you!
Don't get discouraged by those so called "EXPERT"! I can tell you most of the time they "TALK" only but with no practical results.
Seldom people succeed the first time, just keep on trying!

Offline tony

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Re: Leach Low TIM Amplifier V4.5
« Reply #9 on: December 01, 2010, 01:26:26 PM »
@engineer, you can read thru these for more info about SOA:http://home.alphalink.com.au/~cambie/ETI466Web.htm

* you simulate a circuit because you know how it works and wants to tweak, not because you want to learn how that circuit works....simulations do not teach you to be circuit smart...it comes with experience....
*http://www.diyaudio.com/forums/power-supplies/191730-tonys-latest-traffo-diy-build-15.html#post4375385
*do not judge any amp by its schematics, drawing lang yon, look instead at the finished amp, it tells a lot about the amp and its builder.....
http://ronelex.com/bias-current-output-transistor-amplifier/156

Offline Engr. Dacuycoy

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Re: Leach Low TIM Amplifier V4.5
« Reply #10 on: December 01, 2010, 01:49:51 PM »
thanks for link though i can't read it this time since i am in the office. the 3 and 6 pairs version is based on Jens Rasmussen DIYAUDIO. it was made single sided for the elab audio enthusias to make their own pcb. the dimensions are almost identical.
I'm a Mechanically trained, electronic to me is just an hobby and if I can do it, so can you!
Don't get discouraged by those so called "EXPERT"! I can tell you most of the time they "TALK" only but with no practical results.
Seldom people succeed the first time, just keep on trying!

Offline tony

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Re: Leach Low TIM Amplifier V4.5
« Reply #11 on: December 02, 2010, 09:52:16 PM »
it is sad that prof. Leach passed......http://www.diyaudio.com/forums/everything-else/177692-w-m-leach-passed.html

his design stands the test of time....i have built lots of amps based on his design...have exchanged emails with him.....

 
* you simulate a circuit because you know how it works and wants to tweak, not because you want to learn how that circuit works....simulations do not teach you to be circuit smart...it comes with experience....
*http://www.diyaudio.com/forums/power-supplies/191730-tonys-latest-traffo-diy-build-15.html#post4375385
*do not judge any amp by its schematics, drawing lang yon, look instead at the finished amp, it tells a lot about the amp and its builder.....
http://ronelex.com/bias-current-output-transistor-amplifier/156

Offline Engr. Dacuycoy

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Re: Leach Low TIM Amplifier V4.5
« Reply #12 on: December 02, 2010, 10:09:40 PM »
The loss of Dr. Leach will leave a great hole in the ranks of those who will train the next generation of audio engineers.

http://www.ece.gatech.edu/personnel/bio.php?id=62

http://www.ece.gatech.edu/media/news/release.php?id=5255
I'm a Mechanically trained, electronic to me is just an hobby and if I can do it, so can you!
Don't get discouraged by those so called "EXPERT"! I can tell you most of the time they "TALK" only but with no practical results.
Seldom people succeed the first time, just keep on trying!

Offline danny

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Re: Leach Low TIM Amplifier V4.5
« Reply #13 on: December 03, 2010, 04:17:58 AM »
oh my tsk tsk
another one? after Randy,  now its Dr. Leach naman  :( :(
we are losing great audio engineers

Offline insomartin

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Re: Leach Low TIM Amplifier V4.5
« Reply #14 on: December 03, 2010, 04:36:22 AM »
we are losing great audio engineers

great new ones will be born pa din...
it's sad pero his design stood the test of time and it will be.


Offline danny

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Re: Leach Low TIM Amplifier V4.5
« Reply #15 on: December 03, 2010, 04:52:27 AM »
pero nakakagulat lang dba kung iisipin
with in a year dalawa nalagas agad
si randy at si leach  :(

Offline kulapo

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Re: Leach Low TIM Amplifier V4.5
« Reply #16 on: December 04, 2010, 07:24:03 AM »
mga master tanong ko lang po, sa amp nato, kung halimbawa walang mabiling capacitor na mica pwede ba yung ceramic, ano pong epekto nito sa ampli? ???

Offline tony

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Re: Leach Low TIM Amplifier V4.5
« Reply #17 on: December 04, 2010, 08:43:22 AM »
silvered mica ang preferred because of its stability with temperature, if you can not source it, then you can use ceramics. i have used both and soundwise i am not able to hear any difference.....

silvered micas are available from Mouser, Digi-key, Allied and other stateside vendors....

maybe engineer can do a group buy for these parts depending interest....
* you simulate a circuit because you know how it works and wants to tweak, not because you want to learn how that circuit works....simulations do not teach you to be circuit smart...it comes with experience....
*http://www.diyaudio.com/forums/power-supplies/191730-tonys-latest-traffo-diy-build-15.html#post4375385
*do not judge any amp by its schematics, drawing lang yon, look instead at the finished amp, it tells a lot about the amp and its builder.....
http://ronelex.com/bias-current-output-transistor-amplifier/156

Offline kulapo

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Re: Leach Low TIM Amplifier V4.5
« Reply #18 on: December 04, 2010, 12:02:43 PM »
ok sir salamat.

Offline Engr. Dacuycoy

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I'm a Mechanically trained, electronic to me is just an hobby and if I can do it, so can you!
Don't get discouraged by those so called "EXPERT"! I can tell you most of the time they "TALK" only but with no practical results.
Seldom people succeed the first time, just keep on trying!