Anyone audition this pretty amp yet ? Its now cheaper than the TA-10 and comes standard with a blue Alps pot !
How does it compare to the TA-10 ?
http://www.diykits.com.hk/
How does it compare to the TA-10 ?
http://www.diykits.com.hk/
An externally hosted image should be here but it was not working when we last tested it.
Ok, well I'm very sorry. It wasn't my intention to offend several thousand people...
But I'm not bullshitting, the 2024 is much more vulnerable than the 2021 in my experience... Plus it has slightly less power given the fact that it is limited in supply voltage due to poor cooling capabilities...
Well ok I'll cut it out, but for those looking for a ready built amp go for the TA2020! (but I do wonder what the beep you're doing on this forum if you do so?!)
But I'm not bullshitting, the 2024 is much more vulnerable than the 2021 in my experience... Plus it has slightly less power given the fact that it is limited in supply voltage due to poor cooling capabilities...
Well ok I'll cut it out, but for those looking for a ready built amp go for the TA2020! (but I do wonder what the beep you're doing on this forum if you do so?!)
Got one playing just now
Hi Edt,
I bought one for the ridiculous price of €59,-.
My comments (listen with half an ear since I am a new bee to High End DIY)
It is well build en sounds fine on my system, though I am still in the run in phase. It seems easy to tweak (coils, caps etc) and came with a decent power supply.
I can't understand how they do this for such little money! If I throw another 20€ at it I will have a very nice amp!! The only problem is that I have promised this one to my daughter (and the next one to my son...... and the third to my wife
My 5 ct.
Peter
Hi Edt,
I bought one for the ridiculous price of €59,-.
My comments (listen with half an ear since I am a new bee to High End DIY)
It is well build en sounds fine on my system, though I am still in the run in phase. It seems easy to tweak (coils, caps etc) and came with a decent power supply.
I can't understand how they do this for such little money! If I throw another 20€ at it I will have a very nice amp!! The only problem is that I have promised this one to my daughter (and the next one to my son...... and the third to my wife
My 5 ct.
Peter
I can imagine there can be improvements when changing some components in the output filter, like using decent MKP caps and MPP toroidal cores to wind inductors with....
But then I'd say just use a better (for insance TA2020 based) amp, they usually have more space for such components... Like I mentioned I'm not too fond of this chip to start with and I think it's still about the weakest link in the chain here...
But then I'd say just use a better (for insance TA2020 based) amp, they usually have more space for such components... Like I mentioned I'm not too fond of this chip to start with and I think it's still about the weakest link in the chain here...
True and I have one
Hi V-bro,
I am playing around with this amp, to get in shape for building my own "better" amps (as you know ;-).
My soldering technique is improving a lot, hope to be able to solder smd soonest!
Just took of the inductors. I will experiment with self wound aircores here (o,8 mm wire).
Caps need to be replaced too. I am thinking of 6,8 uF 440 V Jantzen foilcaps to replace the noname with caps on the board. Not very expensive, and a nice upgrade I hope.
What do you think?
Peter
Hi V-bro,
I am playing around with this amp, to get in shape for building my own "better" amps (as you know ;-).
My soldering technique is improving a lot, hope to be able to solder smd soonest!
Just took of the inductors. I will experiment with self wound aircores here (o,8 mm wire).
Caps need to be replaced too. I am thinking of 6,8 uF 440 V Jantzen foilcaps to replace the noname with caps on the board. Not very expensive, and a nice upgrade I hope.
What do you think?
Peter
Re: True and I have one
Not being V-bro but here's my 2 cents.
Properly cored and shielded inductors are actually better than air core coils for this purpose, I wouldn't replace the inductors.
6,8 uF capacitors are way over the top and will result in a quite severe power on pop, I'd recommend 1 uF or 2,2 uF types. Especially with 1 uF types there's a lot of inexpensive excellent choices.
peterhenk said:
Not being V-bro but here's my 2 cents.
Properly cored and shielded inductors are actually better than air core coils for this purpose, I wouldn't replace the inductors.
6,8 uF capacitors are way over the top and will result in a quite severe power on pop, I'd recommend 1 uF or 2,2 uF types. Especially with 1 uF types there's a lot of inexpensive excellent choices.
Nothing personal Saturnus but 1 uF for input caps is way too small. This was one of the first design errors manufacturers of amps with TA2024 made. There will simply be low roll off with 1 uF. Bad advice.
2.2 uF is OK but just leave the original ones where they are and it will be fine. This amp does not pop at power up as it has a relay !! Fact.
Component quality is OK, way better than most amps with TA2024 anyway. Just enjoy the amp. If you want to mod something better use a TA2020 based amp ( preferably one with poor quality components so that modding it is justified ).
Just my opinion.
Jean-Paul
2.2 uF is OK but just leave the original ones where they are and it will be fine. This amp does not pop at power up as it has a relay !! Fact.
Component quality is OK, way better than most amps with TA2024 anyway. Just enjoy the amp. If you want to mod something better use a TA2020 based amp ( preferably one with poor quality components so that modding it is justified
).Just my opinion.
Jean-Paul
inductors??
Hi Jean Paul,
Next ones will be 2020 or an more powerfull T-amps (this one is actually for my wife)
i have taken those inductors of already.
I can either solder the original inductors back, give air-coils a try or get some toroids (but where??).
So many choices
Thanks every body for the input
Peter
Hi Jean Paul,
Next ones will be 2020 or an more powerfull T-amps (this one is actually for my wife)
i have taken those inductors of already.
I can either solder the original inductors back, give air-coils a try or get some toroids (but where??).
So many choices
Thanks every body for the input
Peter
Just leave it original. It looks good and probably it sounds more than good. The risk for damage weighs more than subjective results by replacing already good components.
Arjen Helder sells nice TA2020 amps. I ordered some and I am curious how they are.
You already removed the inductors ? It will be hard to obtain just 4 of the same SMD coils. You, ahem, prove my point to leave it untouched.
Arjen Helder sells nice TA2020 amps. I ordered some and I am curious how they are.
You already removed the inductors ? It will be hard to obtain just 4 of the same SMD coils. You, ahem, prove my point to leave it untouched.
jean-paul said:
Nothing personal, jean paul, but you're wrong. The t-amp had 0.33 uF input caps. It was badly designed because in combination with the other input circuitry it made low Q filter that had effect much higher in the frequency band than I think the designers intended.
Without the additional input filtering a 1 uF cap is more than adequate for rulerflat frequency response to about 40 Hz.
Did I mention t-amp or its specific input caps ?
Anyway, 40 Hz is poor. 2.2 uF is adequate, also with the original t-amp.
http://www.michael.mardis.com/sonic/inputmods_F.html
http://www.michael.mardis.com/sonic/measure/5066-freq.html
Anyway, 40 Hz is poor. 2.2 uF is adequate, also with the original t-amp.
http://www.michael.mardis.com/sonic/inputmods_F.html
http://www.michael.mardis.com/sonic/measure/5066-freq.html
Re: True and I have one
Well, be careful because I'm afraid that aircores are by nature very unsuitable for filtering RF (as 1,5Mhz is airborne RF). It'll work as a fantastic transmitting antenna. A closed magnetic system nicely keeps the field inside without letting it become airborne.... I know guys are busy to make them shielded, perhaps that is a good solution....But I'm afraid the idea about using aircores for class T is much based upon knowledge about them being superior in speaker filters, signals under 20Khz. It's a whole different ballgame and horses for courses, I place my bet on a coil well encapsulated in the core material....or at least with a closed magnetic system (interesting to know perhaps that the original SI amplifier inductors are also wound on a core, but the construction still allows much radiation to come free....as it has a top and bottom that do not "see" eachother, so it has to come free there, a toroidal core keeps it all inside...)
About the caps?
I would be surprised if you hear the difference between them and other decent quality polyprop caps of a few cents less, but let someone else switch between the one and the other caps. When you have distinguished them more often than 95% right I'm afraid we have found someone with superhuman hearing!
peterhenk said:
Well, be careful because I'm afraid that aircores are by nature very unsuitable for filtering RF (as 1,5Mhz is airborne RF). It'll work as a fantastic transmitting antenna. A closed magnetic system nicely keeps the field inside without letting it become airborne.... I know guys are busy to make them shielded, perhaps that is a good solution....But I'm afraid the idea about using aircores for class T is much based upon knowledge about them being superior in speaker filters, signals under 20Khz. It's a whole different ballgame and horses for courses, I place my bet on a coil well encapsulated in the core material....or at least with a closed magnetic system (interesting to know perhaps that the original SI amplifier inductors are also wound on a core, but the construction still allows much radiation to come free....as it has a top and bottom that do not "see" eachother, so it has to come free there, a toroidal core keeps it all inside...)
About the caps?
I would be surprised if you hear the difference between them and other decent quality polyprop caps of a few cents less, but let someone else switch between the one and the other caps. When you have distinguished them more often than 95% right I'm afraid we have found someone with superhuman hearing!
Air cores it will be
Air cores has been the choice.
I prepared the board first drilling holes for the nylon "cores" then I wound 0,8 mm inductors 17mm long x 3 layers (calculator from the web) to get the 10 nF cores.
Soldered all back in and........ Very nice sound!!
Sound stage seems bigger, and I seem to hear a slightly warmer and more detailed sound (what a desire does to the brain / ears )
Need your advice on:
1. the applied shielding (aluminium kitchen foil) can this be done???
2. does this influence the DC offset?? I guess my cores are not exactly the same.
At least I did my first oficial amp mod. What fun this is!!
Peter
Air cores has been the choice.
I prepared the board first drilling holes for the nylon "cores" then I wound 0,8 mm inductors 17mm long x 3 layers (calculator from the web) to get the 10 nF cores.
Soldered all back in and........ Very nice sound!!
Sound stage seems bigger, and I seem to hear a slightly warmer and more detailed sound (what a desire does to the brain / ears
)Need your advice on:
1. the applied shielding (aluminium kitchen foil) can this be done???
2. does this influence the DC offset?? I guess my cores are not exactly the same.
At least I did my first oficial amp mod. What fun this is!!
Peter
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