I think the 2022 will only be back by end Jun. If you want to listen to it, will have to wait until than, else TT anytime.

Ok, will let you know once it is ready.

What TT is this? T-amp or tube pre-amp? Location?
Maybe I can join do a melawat sambil belajar

What hole(s) you guys are talking about

Men are born to know that, it is our duty!

T-amp stock board accept bare wire, the babana female is addition, if you don't need it just don't add it in.

Sakaic, what source you got your 5v from? Like jazzy said you can't squeez much out of it. A normal 7805 5v linear supply only give max 500mA.

I tried with 12V 1.2A/20Hr. Play for about 6hr none stop. I didn't try until it is totally flat because i think that is bad for the amp.
If get bigger one like car 12V battery, I think you can last for days but the charging and gas release from it make you think twice if you want to put it indoor.

This post has been edited by kww: Jun 19 2010, 01:48 PM

Sakaic, Can you take a picture? Tq

Sakaic, Mind to share what is you impression before and after each mod?

sakaic, thanks for sharing, looks cool.
A few questions:
-That is a huge power buffer cap on the right side. 0.5F?
-your 7805 doesn't need heat sink?

I found vocal on 2020 to be thin compare to 2024. I change the input cap and it sound a bit warmer but still lacking.

I love vocal, can't help to always refer to 2024 for any amp I listen to.

I have another version of 2020 datasheet. It stated both Co=0.47uf, Cz=0.47uf (not 0.22uf) and Ccm=0.1uf (not 0.01uf).
I have made the changes, the improvement is quite noticable in in high and mid range. I like the result.

Because of couldn't find better one, I tempolary use Wima 2.2uf 60V as input cap, power cap change to 220uf from 470uf and orginal indoctor remain. I think changing these 3 may improve more but lets wait and see.

The version of 2020 datasheet I got.


My MKIII caps all change to 0.47uf and o.1uf


The small 2.2uf Wima input cap and 220uf power cap


Please don't use default RCA cable supply with MKIII, change it immediately, huge improvement

Xtorm, changing the 0.47uf cap give smoother high and mid. The vocal didn't sound clinical and harsh anymore. I don't know is it analog.

Ya, the bass reduce after I change input cap and power cap. I am not sure which one affect it but I will change the input cap to obbligator once I found it someway in my store. The power cap is Elna cerafine, should be of better quality compare to the original.

Sakaic, you mean for 8ohm it should be 0.22uf and Cdo is 0.01uf (not as the datasheet 0.1uf)?

I have tried both 0.47uf and 0.22uf on Cz. I like 0.47uf more in that position even my speaker is 8ohm. The vocal is fuller, warmer, thicker and bass is better. Beside that I also change an obbligator 2uf 650v to replace the wima at input cap, vocal is smoother, mid and low improve. Maybe it need more time but I think not much changes.

Overall I am satisfy with it after swap of the capacitors. There are a few failure but not worth mention.

After that I also do an AB test with 2024, I think it is close, but if listen careful enough, 2024 still win by a small margin, I think I am really bias, it is all in my brain telling me 2024 is good because i have been listening to it for few years already, I am use to it.

Here is the summary of thing I highly recommend to change for 2020 MKIII (don't ask me to use scope to proof it to you, I have only my ear to tune):

1. Don't use the RCA cable supply with it, swap with better cable.
2. Co change to 0.47uf.
3. Input cap must change to better one in range of 2uf-3uf (non electrolytic)
4. Cz is already 0.47uf but changing to a better brand will improve the sound.
5. Solder connect all cable, the cable socket supplied is of low quality.

Next upgrade I will consider is to use better inductors and better power supply of 150VA transformer with a simple CRC filter.

Jazzy, not much progress la. I am just doing 1 to 1 swap, noting much will happen.

Depends on what mod you do on it.
You can start reading from page 1, lots of feedback and mod from members.

My 1st version of t amp still working until now (3 years ago).

I tried SMPS and a bridge rectified trans, 2nd option wins by miles even it is just 45VA as compare to 2A out from SMPS.
Provide it as much power you can but don't goes over 14.5v.