TATCA - Finally Completed + Images

Vikash · 29th March 2005, 07:35 PM

A while ago now I started taking bits of old equipment and putting together a Tiny and Transparent Chip Amp based on B&D's lm3875 kit. Today I finally got round to finishing the PSU and taking some snaps:

http://www.vikash.info/audio/tatca/images.asp

Really chuffed with this one. Just need to make a longer umbilical cable and perhaps mate the whole thing with some TB fullrange for the office.

Zaph, where ya hiding that TB article, grrr...

This was the first PCB you ever sent me Brian

Come a long way, but those Rev.1 LM3875 boards are still as sweet as they come

homer09 · 29th March 2005, 09:02 PM

What a cute little amp

No but seriously, i really like it, its different, compact and sleek. Good work Vikash.

Makes me want to rethink my "typical" chasis that i have in the works...

carlosfm · 29th March 2005, 09:24 PM

Cool.

mod_evil · 30th March 2005, 01:10 AM

Friend... This is very Cool...

The pcb is BrianGT?

Thanks Mod.

sivan_and · 30th March 2005, 01:18 AM

Sweet!!

homer09 · 30th March 2005, 03:37 AM

Quote:

Originally posted by mod_evil
Friend... This is very Cool...

The pcb is BrianGT?

Thanks Mod.

Yeah they are, Vikash says so in his first post.... They are the very first version of brian's boards

Nuuk · 30th March 2005, 07:26 AM

Good thinking Vikash. Now your next challenge is to come up with some transparent heatsinks!

How good is (thick) glass as a heatsink. The LM3875 doesn't seem to put out much heat anyway!

Yoghourt · 30th March 2005, 08:47 AM

Contrary to what I thought, glass is not so bad a good thermal conductor:
http://www.projects.ex.ac.uk/trol/dictunit/notes5.htm
But one should not expect too much of it (Gth=1 vs aluminium Gth=240)

So now, problem are:
- how to mount tightly a chip to some kind of flass heatsink
- how to make it "safe" (no glass collapsing at the first little hit)

filholder · 30th March 2005, 08:02 PM

Really good work there Vikash.

Got me thinking. I might do my next one out of copper plate and perspex. Cos you have got a really good loook there.

Seeing as you are in the u.k. and do a lot of building do you know of anywhere to get good quailty resistors, well caddocks really.

Any ideas?

zei · 30th March 2005, 08:15 PM

Maybe you was just kidding, but i have the full TB article from zaph in a zipfile.

With the ok from the author i,ll send it to you?

well, just pm me if you need it.

regards

29th March 2005, 07:35 PM	#1
Vikash diyAudio Moderator Emeritus Join Date: May 2003 Location: UK	TATCA - Finally Completed + Images A while ago now I started taking bits of old equipment and putting together a Tiny and Transparent Chip Amp based on B&D's lm3875 kit. Today I finally got round to finishing the PSU and taking some snaps: http://www.vikash.info/audio/tatca/images.asp Really chuffed with this one. Just need to make a longer umbilical cable and perhaps mate the whole thing with some TB fullrange for the office. Zaph, where ya hiding that TB article, grrr... This was the first PCB you ever sent me Brian Come a long way, but those Rev.1 LM3875 boards are still as sweet as they come __________________ "The human mind is so constituted that it colours with its own previous conceptions any new notion that presents itself for acceptance." - J. Wilhelm. (But I still think mine sounds better than yours.)

29th March 2005, 09:02 PM	#2
homer09 diyAudio Member Join Date: Jan 2004 Location: Montreal	What a cute little amp No but seriously, i really like it, its different, compact and sleek. Good work Vikash. Makes me want to rethink my "typical" chasis that i have in the works... __________________ Most people wouldn't know good music if it came up and bit them in the ***. - Frank Zappa

30th March 2005, 01:18 AM	#5
sivan_and diyAudio Member Join Date: Dec 2004 Location: Dxb / India	Sweet!! __________________ SivanandBalan

30th March 2005, 07:26 AM	#7
Nuuk diyAudio Member Join Date: Feb 2003 Location: Somerset, SW England	Good thinking Vikash. Now your next challenge is to come up with some transparent heatsinks! How good is (thick) glass as a heatsink. The LM3875 doesn't seem to put out much heat anyway! __________________ The truth need not be veiled, for it veils itself from the eyes of the ignorant.

30th March 2005, 08:47 AM	#8
Yoghourt diyAudio Member Join Date: Jun 2004 Location: Alpes	Contrary to what I thought, glass is not so bad a good thermal conductor: http://www.projects.ex.ac.uk/trol/dictunit/notes5.htm But one should not expect too much of it (Gth=1 vs aluminium Gth=240) So now, problem are: - how to mount tightly a chip to some kind of flass heatsink - how to make it "safe" (no glass collapsing at the first little hit) __________________ Dzharis: raaaaaah lovelyyyy!


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29th March 2005, 09:24 PM	#3
carlosfm Banned Join Date: Mar 2003 Location: Lisbon, Portugal	Cool.

30th March 2005, 01:10 AM	#4
mod_evil diyAudio Member Join Date: Dec 2004 Location: Rio	Friend... This is very Cool... The pcb is BrianGT? Thanks Mod.

30th March 2005, 08:02 PM	#9
filholder diyAudio Member Join Date: Jan 2005 Location: london	Really good work there Vikash. Got me thinking. I might do my next one out of copper plate and perspex. Cos you have got a really good loook there. Seeing as you are in the u.k. and do a lot of building do you know of anywhere to get good quailty resistors, well caddocks really. Any ideas?

30th March 2005, 08:15 PM	#10
zei diyAudio Member Join Date: Feb 2005 Location: Gothenburg, Sweden	Maybe you was just kidding, but i have the full TB article from zaph in a zipfile. With the ok from the author i,ll send it to you? well, just pm me if you need it. regards

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