ta 2024
hi blair & jazzy
eloquently put blair,yes.
as for the sound,to me it was like not working and working.
hi blair & jazzy
eloquently put blair,yes.
as for the sound,to me it was like not working and working.
T amp in Mayalisa
Im very glad to see people are enjoying the T-amp so much all over the world!
i never expected this to take off as it did!
Thanks everyone ! 🙂
Im very glad to see people are enjoying the T-amp so much all over the world!
i never expected this to take off as it did!
Thanks everyone ! 🙂
Re: T amp in Mayalisa
Hi there Arjen,
No, thanks to you for making it possible (and affordable too!) 😀
We had great fun playing around removing and replacing 'stuffs'.
For what it is worth, in stock version it IS a great amp.. Don't get me wrong, we're just squeezing a 'lil more just to get more mileage if you know what I mean.. 😉
We're looking forward to your new TA2024 board.. Will discuss with the gang on what would be their wish list on the new board. We still have time to give you the feedback, right? 😉
JustBlair thanks for the intro.. you make me feel at home here!
Hi there Arjen,
No, thanks to you for making it possible (and affordable too!) 😀
We had great fun playing around removing and replacing 'stuffs'.
For what it is worth, in stock version it IS a great amp.. Don't get me wrong, we're just squeezing a 'lil more just to get more mileage if you know what I mean.. 😉
We're looking forward to your new TA2024 board.. Will discuss with the gang on what would be their wish list on the new board. We still have time to give you the feedback, right? 😉
JustBlair thanks for the intro.. you make me feel at home here!
ArjenShenzhen said:
Re: ta 2024
I may just give this a try. I find it hard to believe it will make such a difference, but I have been very wrong before and I am happy to be wrong again.
Weekend is here, I will try and find some time to give it a go...
JB
albin said:
I may just give this a try. I find it hard to believe it will make such a difference, but I have been very wrong before and I am happy to be wrong again.
Weekend is here, I will try and find some time to give it a go...
JB
TA2024 worldwide
Hi there Jazzy,
Glad to see so many people are enjoing this,
When i found this lot of PCB's it was Exess stock so the price was low, i know the PCB is not perfect, the buffer caps are small and the input caps are not ideal, ive changed those for 10.000 uF buffercaps and 2.2 uF foil caps at the input.
I think for smaller applications and portable they are also very suitable! the only drawback is that the IC needs 60 mA idle current, but excluding that the amp only uses what it puts out, its very efficient.
Im now working on the new design, planning on keeping it simple and where people want to modd, i want to add some more space for components where it is fixed i want to use SMD.
Any advice or idea's are still very welcome!
Greetings from Shenzhen China,
Arjen Helder
Hi there Jazzy,
Glad to see so many people are enjoing this,
When i found this lot of PCB's it was Exess stock so the price was low, i know the PCB is not perfect, the buffer caps are small and the input caps are not ideal, ive changed those for 10.000 uF buffercaps and 2.2 uF foil caps at the input.
I think for smaller applications and portable they are also very suitable! the only drawback is that the IC needs 60 mA idle current, but excluding that the amp only uses what it puts out, its very efficient.
Im now working on the new design, planning on keeping it simple and where people want to modd, i want to add some more space for components where it is fixed i want to use SMD.
Any advice or idea's are still very welcome!
Greetings from Shenzhen China,
Arjen Helder
Albins Power linie Modification
I had a look at your modification Albin. I have to admit I was sceptical that it would make a difference to the board. However my initial impressions (and I am leaving in caveats here, testing was not extensive) are that indeed this modification makes an improvement to the clarity in the mid range and bass regions.
I did not do things just as Albin suggested, looking at the design of the board, I took things a little further to make the power lines as symetrical as possible. I made use of the twin terminals Sure supply for power connections.
I have a couple of Graphics that I am adding to my write up, but the first version is now published
You can read more on my site.
i would very much like someone else to give this a try and tell me if you here a difference as well. The difference seemed very tangible and a definate improvement (though my tests so far have been non-ideal)
I had a look at your modification Albin. I have to admit I was sceptical that it would make a difference to the board. However my initial impressions (and I am leaving in caveats here, testing was not extensive) are that indeed this modification makes an improvement to the clarity in the mid range and bass regions.
I did not do things just as Albin suggested, looking at the design of the board, I took things a little further to make the power lines as symetrical as possible. I made use of the twin terminals Sure supply for power connections.
I have a couple of Graphics that I am adding to my write up, but the first version is now published
You can read more on my site.
i would very much like someone else to give this a try and tell me if you here a difference as well. The difference seemed very tangible and a definate improvement (though my tests so far have been non-ideal)
Attachments
I just tried the tweak via Albin's method. I didn't expect any difference (I already bypassed the diode on board with a wire), but I feel like there is definitely something different. I don't have 2 boards with and without the tweaks, so this is from memory with 5 minutes in between to do the mod. Interesting mod.
Yeah Dweekie. It seems an unlikely mod to me, but I am fairly sure it's a goodun. If you have any more listening impressions please post so i DONT THINK I AM GOING MAD!
justblair said:
And what makes you think I'm not also going mad?
I use the DC socket with the diode replaced with wire. When I first cut the trace in the middle of the power rail, I noticed that one of the channels did not work. I assumed that both rails were powered by the dc socket since there is a trace that follows under the RCA inputs to the other side of the board. The lack of power on one side seems to indicate that power originates only on one side of the board when using the DC socket for power. The mod seperated the bed of caps on board between the two channels instead of sharing them. I'm not sure what kind of electrical explanation can be given for the benefits of the mod since the capacitance remains the same while the point of splitting the power changes, but it seems to logically make sense in my head.
I'd like to have pin 7 (OVERLOADB) connected to a monostable multivibrator (or 555 timer or ?) so that it will illuminate an LED for 0.25 to 1 second when the amp clips. If that's difficult to implement, or not likely to interest enough people, at least have a trace from it to a pad or header pins so that it can be connected to an external pulse-stretcher and LED driver. If there were through-hole pads near the edge of the board, that would allow mounting an LED on-board, or installing header pins (or wires) to connect an external LED.
Same with the fault pin, although that just needs a resistor since it can drive an LED directly. Maybe arrange it so it drives a two-color (green/red) LED to indicate status as OK/Fault.
That's my wish list. Thanks!
Same with the fault pin, although that just needs a resistor since it can drive an LED directly. Maybe arrange it so it drives a two-color (green/red) LED to indicate status as OK/Fault.
That's my wish list. Thanks!
Finally had a chance to play with some of the Arjen boards I purchased a couple of months ago! Will try and get some pics up later.
I was pleasantly surprised by the sound of the stock board. It was a little harsh on the highs but the lows were excellent. i only had time to mod one board so swapped the power supply capacitors for some 470uf panasonic fm's and swapped out the inductors for some 10uH Jantzen air core inductors. This made the sound considerably smoother and reduced the harshness I heard in the high end of the stock board. I still need to swap out the input capacitors which I will do on the 'final' board.
I was pleasantly surprised by the sound of the stock board. It was a little harsh on the highs but the lows were excellent. i only had time to mod one board so swapped the power supply capacitors for some 470uf panasonic fm's and swapped out the inductors for some 10uH Jantzen air core inductors. This made the sound considerably smoother and reduced the harshness I heard in the high end of the stock board. I still need to swap out the input capacitors which I will do on the 'final' board.
Hi Phresh,
Could you point a web page for 10uH Jantzen air core inductors on Digikey, Mouser or Farnell ? Thanks.
Could you point a web page for 10uH Jantzen air core inductors on Digikey, Mouser or Farnell ? Thanks.
I got them from www.audio-components.co.uk Took a week or so to arrive as they weren't in stock but the person I dealt with was very helpful.
@lostcause - Each one is probably about the size of a thimble. The leads are far too big for the original holes so I had to attach them to a piece of smaller wire.
@toolkit - Yeah, they are a shade over £2 each, but even adding better power supply caps and a couple of better input caps the board cost is still around £20. You could spend £100 on a power supply and still end up with an amp that bats far far above what it costs.
@toolkit - Yeah, they are a shade over £2 each, but even adding better power supply caps and a couple of better input caps the board cost is still around £20. You could spend £100 on a power supply and still end up with an amp that bats far far above what it costs.
phresh said:
Ah - I didn't see any that cheap, I only looked at the 10uH ones and they looked to be about £12 a pop! I've got a set of the Autocostruire ones on my Sonic Impact and am pleased with those but they are a shade over 5Euro a piece inc postage.
You might have been looking at the 10mH inductors, they are in that price range I think. I imagine these are pretty similar to the autocoisture inductors with th added bonus of being a bit cheaper if you live in the UK.
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