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DIY T-Amp User V2, TA2020 AIR CORES!, ~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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TSxtorm
post Nov 29 2008, 09:06 PM

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sorry guys for the late update, been away for few days tongue.gif

QUOTE(Monkey King @ Nov 29 2008, 12:32 PM)
well i cant really tell how much it improves since i never tried the 1% yet... anyway...most 1% are quite cheap... 1/4W type would be sufficient eh? hehe

now i have an excuse to use my another t-amp to replace my car amp...

i furbared the car amp when trying to change the op amps... damn 2 layer PCB... too lazy to figure out where is the problem now..declare RIP...

well my question is, direct connect V+ to battery positive (with a fuse of course) and GND directly to ' - ' post of battery.

would this t-amp drain away the battery juice over time via such connection? since the board dosent have place for me to connect REM+

plan to use it to drive dual 6 x 9 at rear biggrin.gif
*
yes it can drive your 6x9, as in how loud i have no idea. a 12v direct with an on\off switch is enough, if you tot off using the rem+, a relay can be use, REM+ have enough power to trigger a relay, tht was wat i did with my friend car amp smile.gif but watch out for aeroplane sound
Monkey King
post Nov 29 2008, 09:14 PM

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QUOTE(xtorm @ Nov 29 2008, 09:06 PM)
sorry guys for the late update, been away for few days tongue.gif
yes it can drive your 6x9, as in how loud i have no idea. a 12v direct with an on\off switch is enough, if you tot off using the rem+, a relay can be use, REM+ have enough power to trigger a relay, tht was wat i did with my friend car amp smile.gif but watch out for aeroplane sound
*
yo bro, thanks for the reply... i doubt any aeroplane sound would occur as long as you have proper grounding back to battery ' - ' terminal.

well, if im not mistaken, the battery voltage would fluctuate due to inconsistent load? (A/C, headlights , etc...) do we need to construct a voltage regulator for it? say LM7812 equivalent..?

if the t amp project in car is successful, might get another 2 units to power up the components. all using Pre-out, ditch the build in amp of HU. Forget about spending few hundred bucks on fancy car amps..

mind share the relay circuit? coz its kinda hard for me to goggle for right one.. sad.gif
jazzy939
post Nov 29 2008, 10:13 PM

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No relay circuit necessary. Just buy the 12V relay for the car and wire accordingly. 5 bucks only I think.. wink.gif

Anyway bought two 50K pot from NIXIE today.. we'll see how long will it lasts! wink.gif RM2.50 ea. laugh.gif

This post has been edited by jazzy939: Nov 29 2008, 10:56 PM
Najmods
post Nov 29 2008, 11:01 PM

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Been a while since I done something to my T-Amp. I use Senior discreet amp, now the soundstage is very wide and unbelievably deep, before this everything is in your face, like if you hear artists performs on stage, all the instruments is at the same level as the singer, now everything sits where it supposed to be, and even layers of vocal is prominent, my favorite artists love to use her whisper vocal behind her singing vocal, now I can hear that without any trouble

Another mod I done is using separate power from my PC PSU because when I game, I hear some noise because of my graphics card emit strange high frequency noise to the power line (its normal, as I read around, some components on graphics card emit that, forgot what it is called), I found one old 450W PSU lying around, I open it up, replaced few capacitor with higher quality and jumpstart it to power T-Amp. 15Amps of current available to the T-Amp only. I don't know if that sufficient enough to give boom to it tongue.gif Because the load is so low, I run it totally passive. How does it sounds? Wonderful biggrin.gif
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jazzy939
post Nov 29 2008, 11:08 PM

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It's s'wonderful! wink.gif
Monkey King
post Nov 30 2008, 04:26 AM

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I tried swap the T amp power supply from the Teletron 12V 3A unregulated to Generic PC PSU (i suppose this is also another SMPS as well) since i heard there is a lot of good response using SMPS.

part of the reason also i'm worried that constant 16V supply (measured with DMM) from the teletron might kill the T amp someday.

however, much to my surprise, the t amp DOES NOT LIKE PC PSU.

when i switch on, there is 'noise' yes noise like you heard when your radio reception is bad.. even w/o playing any songs..

quicky disconnect it, tried with few other PSU like Enlight, Acbel... same result...


jazzy939
post Nov 30 2008, 07:16 AM

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Unregulated PSU's voltage is always higher when measured with no loads...

My Junior is using a PC PSU.. no big deal.. what happened to your T-Amp? hmm.gif
Monkey King
post Nov 30 2008, 08:04 AM

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QUOTE(jazzy939 @ Nov 30 2008, 07:16 AM)
Unregulated PSU's voltage is always higher when measured with no loads...

My Junior is using a PC PSU.. no big deal.. what happened to your T-Amp? hmm.gif
*
good morning bro jazzy...

i just did some minor mod to my teletron unregulated..

and well the measured 16V is obtained when the t amp is connected to the supply, with music playing..


oh about the mod...

i paralleled one of this cap at the output of the power supply, to my delight, there is much improvement in term of sonics.

more depth, warm vocal...
user posted image

i may plan to have 3 t-amps with different mod level (and a comparison of course)

1: high end, putting the best replacement component for the amp, with primary objective of maximizing the SQ. (Boutique input caps 2-3% tol, tighther tolerance components, replace almost all the components on board, left out only the TA2024 itself) of course the parts are the best that i can possibly afford.

2. Mid range: the one i have now ... Vishay MKT1813 input, SMD caps replacement with polyester caps (i've ordered 50 pcs of KEMET 0.1uF polyester 5% from farnell....dirt cheap, 1% Metal Film resistors. i have lots of 104 Mylar caps to replace..

3. Base Line: almost stock, maybe just remove the polarized 1uF or replace with anything i can salvage.


all 3 will feed by same power supply, driving same speakers

what do you think biggrin.gif

This post has been edited by Monkey King: Nov 30 2008, 08:22 AM
jazzy939
post Nov 30 2008, 08:43 AM

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Morning Monkey King!
Big plans there! laugh.gif I'd say its a good learning experience modding the T-Amps, tuning/tweaking and how each one of the mods affect the sound output. Some very significant, some barely. You won't know until you do it hands on!
Keep us posted. Good luck and have fun! thumbup.gif


Monkey King
post Nov 30 2008, 08:50 AM

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aha yeah actually i'm planning to get few more t amps, for car, and maybe a good idea for father's day present too... (ready built of course)

since tripath no longer produce any of these chip, i do worrythis t amp might extinct like black gates caps someday... sad.gif
jazzy939
post Nov 30 2008, 08:54 AM

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You better get them while they're available! tongue.gif

But there are other amps around.
The TA2024 was raved for the 'best bang per buck' it presents.. wink.gif

So little money, so much 'sound'...

This post has been edited by jazzy939: Nov 30 2008, 08:54 AM
abel
post Nov 30 2008, 02:10 PM

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ermm make me wanna built one T-amp ... smile.gif
can this T-amp feed with 14v DC .... ?


Added on November 30, 2008, 2:28 pm
QUOTE(Najmods @ Nov 29 2008, 11:01 PM)
Been a while since I done something to my T-Amp. I use Senior discreet amp, now the soundstage is very wide and unbelievably deep, before this everything is in your face, like if you hear artists performs on stage, all the instruments is at the same level as the singer, now everything sits where it supposed to be, and even layers of vocal is prominent, my favorite artists love to use her whisper vocal behind her singing vocal, now I can hear that without any trouble

Another mod I done is using separate power from my PC PSU because when I game, I hear some noise because of my graphics card emit strange high frequency noise to the power line (its normal, as I read around, some components on graphics card emit that, forgot what it is called), I found one old 450W PSU lying around, I open it up, replaced few capacitor with higher quality and jumpstart it to power T-Amp. 15Amps of current available to the T-Amp only. I don't know if that sufficient enough to give boom to it tongue.gif Because the load is so low, I run it totally passive. How does it sounds? Wonderful biggrin.gif
Attached Image
*
suggess not to use solid state PSU

This post has been edited by abel: Nov 30 2008, 02:28 PM
ijan
post Nov 30 2008, 02:33 PM

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Back on the PSU requirement, since the unit is SUPPOSEDLY ran on 8xAA battery, power input shuld be that high at output power of 10W into 8ohm. Say getting a 15V out tranny regulated to 12V, at most 30VA is good enough eh? Iq is too little to even bother, this shud lead to proper operation of the chip?

The datasheet isnt of much help..

However, a 1A 12V dc jack shud be able to run it eh? Got my new *baby* liao..
Najmods
post Nov 30 2008, 02:40 PM

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QUOTE(abel @ Nov 30 2008, 02:10 PM)
ermm make me wanna built one T-amp ... smile.gif
can this T-amp feed with 14v DC .... ?


Added on November 30, 2008, 2:28 pm

suggess not to use solid state PSU
*
IIRC maximum you can go is 13.8V. If you use 14V maybe it can run, but it won't last long

About the 'not using solid state PSU', please elaborate
abel
post Nov 30 2008, 02:44 PM

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QUOTE(Najmods @ Nov 30 2008, 02:40 PM)
IIRC maximum you can go is 13.8V. If you use 14V maybe it can run, but it won't last long

About the 'not using solid state PSU', please elaborate
*
means not using computer PSU .... using those AC transformer than put rectified to convert to DC

This post has been edited by abel: Nov 30 2008, 02:47 PM
Najmods
post Nov 30 2008, 02:50 PM

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QUOTE(abel @ Nov 30 2008, 02:44 PM)
means not using computer PSU .... using those AC transformer than put rectified to convert to DC
*
Any advantages of doing so?
abel
post Nov 30 2008, 02:57 PM

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QUOTE(Najmods @ Nov 30 2008, 02:50 PM)
Any advantages of doing so?
*
normally when u used motor or Switching PSU , its becomes distorted
jazzy939
post Nov 30 2008, 06:21 PM

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SMPS is switching PSU! laugh.gif
The T-Amp works well with switching PSU, linear or even battery! (SLA)..
It is not your normal chip amp. Its a Class T and/or D... normal believe/school of thoughts about SMPS being 'dirty' does not apply here... laugh.gif

ijan, a 12V 1A should suffice but higher is 'better' I am using a 4.2A at 13.6VDC

QUOTE(abel @ Nov 30 2008, 02:57 PM)
normally when u used motor or Switching PSU , its becomes distorted
*
This post has been edited by jazzy939: Nov 30 2008, 06:24 PM
abel
post Nov 30 2008, 08:38 PM

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QUOTE(jazzy939 @ Nov 30 2008, 06:21 PM)
SMPS is switching PSU! laugh.gif
The T-Amp works well with switching PSU, linear or even battery! (SLA)..
It is not your normal chip amp. Its a Class T and/or D... normal believe/school of thoughts about SMPS being 'dirty' does not apply here...  laugh.gif 

ijan, a 12V 1A should suffice but higher is 'better' I am using a 4.2A at 13.6VDC
*
ohhh i dunno mah hehehe tongue.gif
thanks for the information

This post has been edited by abel: Nov 30 2008, 10:49 PM
Y.C.
post Dec 2 2008, 02:57 PM

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My 2nd unit of T-amp (with Vishay MKT1822 2.2uF 100V and Panasonic FM 470uF 25V caps) + JP’s Alpha 50K volume pot + computer-notebook-style 12V DC 2.5A SMPS are currently with a very close friend in his office. He uses it over his Cyrus 1 amp driving a pair of Celestion 3 and loves the T-amp instantly. His words: “Sound from your tiny amp is excellent. It’s fast and transparent. My Cyrus 1 sounds slower and less transparent by comparison.” He, however, acknowledges impact of bass of the T-amp is light to which I recommend a 12V DC 7Ah Hitachi battery as he is a firm believer in battery power.

I shall need to buy another new board from Xtorm to build an unit of T-amp for my friend.


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