PopPulse T-amp with Remote - modding - diyAudio
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Old 21st March 2008, 12:22 PM   #1
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Default PopPulse T-amp with Remote - modding

I am surprise no one mention this amp yet, guess I'll be the 1st to start this.
This is a I suspect this amp should became fairly popular as it is one of the few T-amp with Remote volume control.

It uses a TA2022 with around +/- 35v, a LM4562 for buffer/gain (~3x) stage, and an electronic volume chip "M62429" will some additional circuit for remote control.

I was attracted to it be the remote control and the use of the LM4562 (because it is currently my favorite opamp) which shows the design must know a thing or two about good sound. Oh, and the good price helps (sorry, google this yourself).

The amp sounds surprisingly good despite the signal path going thur 3 e-cap (Elna audio bi-polar). And already better than the 41hz amp3/6 I had use before (mostly likely because my speaker requires a bit of current to drive).

I initially thought that the electronic volume was the CS3310, but no, it was a little known chip "M62429". But I believe that this is also a very good sounding chip.

I had already did some mod to this amp. Will post later on this.
Here is an internal pic.
Attached Images
File Type: jpg poppulse_diy1.jpg (85.7 KB, 2861 views)
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Old 21st March 2008, 12:43 PM   #2
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Nice little amp. Seems like a far better bang for the buck than the "KingRex" and more power to boot.

It looks like it's missing some oh so important supply decoupling caps. Not sure why they would have left those out.

http://i29.tinypic.com/15n7g51.jpg
http://i30.tinypic.com/2gufl95.jpg
http://i32.tinypic.com/34hwcb6.jpg
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Old 9th April 2008, 12:51 AM   #3
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Default Re: PopPulse T-amp with Remote - modding

Quote:
Originally posted by ChuckT
I am surprise no one mention this amp yet, guess I'll be the 1st to start this.
This is a I suspect this amp should became fairly popular as it is one of the few T-amp with Remote volume control.

It uses a TA2022 with around +/- 35v, a LM4562 for buffer/gain (~3x) stage, and an electronic volume chip "M62429" will some additional circuit for remote control.

I was attracted to it be the remote control and the use of the LM4562 (because it is currently my favorite opamp) which shows the design must know a thing or two about good sound. Oh, and the good price helps (sorry, google this yourself).

The amp sounds surprisingly good despite the signal path going thur 3 e-cap (Elna audio bi-polar). And already better than the 41hz amp3/6 I had use before (mostly likely because my speaker requires a bit of current to drive).

I initially thought that the electronic volume was the CS3310, but no, it was a little known chip "M62429". But I believe that this is also a very good sounding chip.

I had already did some mod to this amp. Will post later on this.
Here is an internal pic.

Hi Chuck, you´re right.

First I ordered blind without never tested Class D Amps before and
the Poppulse surprizingly gave me much more sound than I ever expected. No thrills in the voices - they appear amazingly clear and present with a great soundstage. And with the Remote a real bargain ... Just have an Idea - what do you guys think ?? Should be
bi-amping possible over Y-Cables ? This would be mean more quality and controll. With the Digital Vol. Level it should be adjust both channels or not ? Does anyone has an idea ?
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Old 9th April 2008, 09:12 AM   #4
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Hi Dealer, (are u really a dealer?)

Wow, finally a user, I am surprise that it took so long.
Yes, this is a good sounding amp indeed, too bad you don't have reference to other T-amps.
I believe you can do bi-amp as the seller said that 1 remote can control 2 amps.

Please check your amp's fuse as mine has a 1A fuse, it should be around 4~5A.

There is a lot tweaking you can do if can solder. Replacing the 3 coupling e-caps will be an improvement.
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Old 9th April 2008, 10:08 AM   #5
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Quote:
Originally posted by ChuckT
Hi Dealer, (are u really a dealer?)

Wow, finally a user, I am surprise that it took so long.
Yes, this is a good sounding amp indeed, too bad you don't have reference to other T-amps.
I believe you can do bi-amp as the seller said that 1 remote can control 2 amps.

Please check your amp's fuse as mine has a 1A fuse, it should be around 4~5A.

There is a lot tweaking you can do if can solder. Replacing the 3 coupling e-caps will be an improvement.
Hi thanks for the tips. Fuses didnt burn till now and modifiying isnt really needed - thats my opinion. I am no technician and dont want to damage something.

I am not dealing presently, but if there are enough stocks of Tripath chips out there I am going to do that. Sadly the chips arent produced meanwhile because Tripath is killed

Do you know anything about the stock situation of the TA 2022 ?
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Old 9th April 2008, 10:36 AM   #6
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No no. Wrong fuse was used in my amp, 1A will limit current and you don't want that.

Too bad u don't diy, can improve by quite a bit.

google "TA2022 inventory" and you'll find a huge stock somewhere, esp in China.
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Old 10th April 2008, 04:41 AM   #7
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Quote:
Originally posted by ChuckT
No no. Wrong fuse was used in my amp, 1A will limit current and you don't want that.

Too bad u don't diy, can improve by quite a bit.

google "TA2022 inventory" and you'll find a huge stock somewhere, esp in China.
Hi Chuck again, nice to hear from you again.

Your search suggestion was a golden shot. I just wanted sure infos if
they are still available in enogh amounts. And they are obviously.

Thank you soo much.
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Old 10th April 2008, 04:15 PM   #8
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I got one of these too last month. I thought it didn't have the lows of my Audiolabs. Hadn't listened to it till I got the Trends TA 10.1 a few days ago.

Out of the box, I find the Trends having more detail and soundstage compared to the Poppulse. Actually the Trends drove my old PSBs quite well. Never heard my PSB sounded its high end before. (Compared to my other speakers which delivered it too well.)

Anyway, can you suggest a mod that will get the Poppulse as close to the stock TA 10.1? Cuz now, I'm looking at whether to get the Winsome Labs Mouse instead.

But then again I don't want to make the same mistake like I did with the Poppulse, ie. thought it would sounds as good as the Trends since its Tripath based. The Winsome Labs is based on the T2050 chip.

Another alternative is to get a Value Mod from Audiomagus.

As you guessed, I'm not actually a DIY. Well not yet in the PCB/electronic area. Most of my DIY experience are based on making my own cables.
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Old 11th April 2008, 01:50 AM   #9
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The biggest bottleneck for the poppulse is the 6 coupling e-caps. Replace those and you'll be on another level. I suggest Visay MKT1822 3.3uf (63v or 100v) will be an excellent choice.

Check the fuse, if it is 1A, replace it with 4~5A.

The decoupling for the poppulse is not the best. And for the life of me, I don't know why there are no regulation of the +/- 35v and that the e-cap is removed just next to the chip. There are only an Elna 4700uf + 1 smd all the way to the ta2022.
So add a nice > 200uF/35V cap back into that empty cap space next to the chip.

There are a lot more mods that can be done. Later.

I have play with the TA2024 chips before and in my opinion the TA2022 sound better in my system (low efficiency speaker)
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Old 11th April 2008, 02:47 AM   #10
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Quote:
Originally posted by ChuckT
The biggest bottleneck for the poppulse is the 6 coupling e-caps. Replace those and you'll be on another level. I suggest Visay MKT1822 3.3uf (63v or 100v) will be an excellent choice.


Hi, I am also no technician. But I would be pleased to check out your
suggestion. Can you post here or another place a detailed pic where the procedure is easy described. Maybe over imagepaint of microsoft.
Quote:
Originally posted by ChuckT
Check the fuse, if it is 1A, replace it with 4~5A.
Thats easy. I hope so :-))
Quote:
Originally posted by ChuckT
The decoupling for the poppulse is not the best. And for the life of me, I don't know why there are no regulation of the +/- 35v and that the e-cap is removed just next to the chip. There are only an Elna 4700uf + 1 smd all the way to the ta2022.
So add a nice > 200uF/35V cap back into that empty cap space next to the chip.

There are a lot more mods that can be done. Later.

I have play with the TA2024 chips before and in my opinion the TA2022 sound better in my system (low efficiency speaker)
And here again I am on limit of my technician knowledge. Maybe I post soon a imageshack link with coloured paints of the whole parts and they are numbered. You can say then for example; "number 6 and 2 must be replaced"

Anyway - I hope you know what you are speaking about and suggestion. Are you an technician or an interested hobby-user ?

Thanks again for your contribution. Hope to see from you more soon.
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