DIY LM3875 amp build.

[hydrovac]

Hi, posting some pictures of LM3875 Gain-clone amp build. One of my earlier projects.

IMG_4342 by hydrovac, on Flickr

IMG_4430 by hydrovac, on Flickr

IMG_4429 by hydrovac, on Flickr

IMG_4428 by hydrovac, on Flickr

IMG_4319 by hydrovac, on Flickr

IMG_4321 by hydrovac, on Flickr

IMG_4322 by hydrovac, on Flickr

IMG_4323 by hydrovac, on Flickr

 

[spirovious]

Congratulations on your build,looks very decent.

 

[sashijoseph]

Nice PCBs...nice build.

What input caps are they...looking like tantalum?

 

[hydrovac]

Congratulations on your build,looks very decent.

Thanks spirovious.

 

[ukjeyaraj]

Very clean build. Can you share some details about components used, and the place from where they were sourced?

 

[hydrovac]

Nice PCBs...nice build.

What input caps are they...looking like tantalum?

DIY PCBs. 10Mf tantalum. Thanks sashijoseph.

 

[hydrovac]

Very clean build. Can you share some details about components used, and the place from where they were sourced?

Thanks ukjeyaraj,

DIY PCBs, basic and minimal comp sourced from local Hyderabad. I got the chip from Manufacturer: TEXAS INSTRUMENTS.

Regards
krishna

 

[omishra]

DIY PCBs. 10Mf tantalum.

:clapping: for DIY PCBs.

If you want to improve sound outright then first replace that 10F Tantalum from signal input by Audiograde caps like these -

ECA1HAM100X - PANASONIC - CAPACITOR, 10UF, 50V | element14 India

Listing
Your Search Results | element14 India | Results

 

[anuragn]

Question for you Mishraji:
I want to upgrade the components in my TA2022 amp. What are the thumbrules like what type of cap should be used for which duty. I tried googling but did not get proper results. Any pointers?

Hydro: Is it a home made PCB?

 

[omishra]

Question for you Mishraji:
I want to upgrade the components in my TA2022 amp. What are the thumbrules like what type of cap should be used for which duty. I tried googling but did not get proper results. Any pointers?

OT, Please forgive me or delete this post
For 2022 Amp,
On Input caps type: PP, I used WIMA
On Power Supply and charge pump caps : Panasonic or Nichicon Low ESR type Electrolytic
On zobal: Metal Film or Stacked Film
On output filter: PP or metalized polyster or Stacked Films anything.
Ferrite core on output: as red/black as per application notes.

Values please stick to TA2022 application notes.

 

[keith_correa]

Very nicely done and all wires well terminated and ends well insulated!
What value are those Rescon caps on the PS board?

And, how does/did it sound?

 

[Jaybe]

Hydrovac,

Inspiration for me as embark on building 3886 Gainclone.

Jayant

 

[keith_correa]

Hydrovac,

Inspiration for me as embark on building 3886 Gainclone.

Jayant

Jayant, if you intend building a Gainclone, it does not get simpler than this & this

 

[Jaybe]

Jayant, if you intend building a Gainclone, it does not get simpler than this & this

Keith,

Indeed ! Thanks for the link. I already have the kit procured from Linuxguru.

Jayant

 

[hydrovac]

Very nicely done and all wires well terminated and ends well insulated!
What value are those Rescon caps on the PS board?

And, how does/did it sound?

Thanks keith_correa,
Rescon 10000F 63volts, decent sonic quality.

 

[hydrovac]

Question for you Mishraji:
I want to upgrade the components in my TA2022 amp. What are the thumbrules like what type of cap should be used for which duty. I tried googling but did not get proper results. Any pointers?

Hydro: Is it a home made PCB?

Yes anuragn it is a DIY PCB.

 

[hydrovac]

Parallel version of LM3875 dual mono design, using all aluminum single chassis to house the two transformers and both amplifier channels (4 chips).
Please note that I have cutoff the power section of the PCB to reduce the size.


IMG_4504 by hydrovac, on Flickr


IMG_4503 by hydrovac, on Flickr


IMG_4500 by hydrovac, on Flickr


IMG_4499 by hydrovac, on Flickr


IMG_4498 by hydrovac, on Flickr


IMG_4497 by hydrovac, on Flickr


IMG_4494 by hydrovac, on Flickr


IMG_4490 by hydrovac, on Flickr

 

[captrajesh]

Very nice build. How much did it cost at the end.

 

[diesel engine]

Thanks ukjeyaraj,

DIY PCBs, basic and minimal comp sourced from local Hyderabad. I got the chip from Manufacturer: TEXAS INSTRUMENTS.

Regards
krishna

LM3875 is made by national semi, not Texas inst I think

 

[diesel engine]

Parallel version of LM3875 dual mono design, using all aluminum single chassis to house the two transformers and both amplifier channels (4 chips).
Please note that I have cutoff the power section of the PCB to reduce the size.


IMG_4504 by hydrovac, on Flickr


IMG_4503 by hydrovac, on Flickr


IMG_4500 by hydrovac, on Flickr


IMG_4499 by hydrovac, on Flickr


IMG_4498 by hydrovac, on Flickr


IMG_4497 by hydrovac, on Flickr


IMG_4494 by hydrovac, on Flickr


IMG_4490 by hydrovac, on Flickr

nice build hydrovac. where did you purchase all those alluminium?