Chip Amp Photo Gallery

[chermann]

Thought I'd throw an oldie into the thread... My first amp build about 15 years ago. Simple internally, a gain clone chip amp kit.

Hi Flappy

nice housing...picture from inside available ?

 

[sthcoaster]

Just finished Audiosector LM3875 monoblocks

More pics in relevant Audiosector forum

 

[mhouston]

Show the outside too.

 

[sthcoaster]

Show the outside too.

More pics in the other thread link provided. Didn’t want to load pics here as well.

 

[techtool]

One of my first Amps

Inspired by Flappy's recent "oldie" post. Here's one of my first amp projects built in the early 70's. It's a mono integrated 18 watt amp based on the Signetics NE540L driver IC. The amp circuit came from a Popular Electronics magazine article from May 1971. Technically, it's not a pure Chip Amp since the 540 drives the two discrete bipolar transistors seen on the back. The pre-amp is a three transistor circuit that came from a book of projects. I had to buy a few of the parts but most were scrounged from junk TV chassis and the like, which explains all the odd sizes.

I made the case and brass knobs in metal shop at school.

Didn't even know this was still around until I was cleaning out my dad's basement one day. This is the project that started it all and led to a life long career in electronics. Not only that, the thing still works. Thanks for looking. Anyone else got one?

 

[Jaytor]

@techtool - that is very cool. How old were you when you built this?

 

[techtool]

Thanks Jay. Started it at 14, in a different chassis and finished like this at 16. This was my sound system, along with a cassette deck and homemade speaker, until I finished college.

 

[Flappytango]

Hi Flappy

nice housing...picture from inside available ?

here is one pic of the inside, pretty basic... I gave this amp to my nephew ~10 years ago (kind of regret it)..

 

[Puffin]

My, MyRef_C

 

[speaker]

The idea here was an exercise in salvage and cost minimisation.

Surprised this isn't done more often, well done!

 

[esprit]

Audiosector

One for the kitchen

 

[esprit]

opp,s

 

[mhouston]

I’ve used two of these in the past now gone to the TDA7293 for 100Wpc.

 

[hanair]

Here is my creation! I built my active 2-way stereo 7 or 8 years ago using linuxguru's version of MyRef PCBs. Recently I moved the whole setup to a new case and better wiring. Here are the pictures!

Thanks to linuxguru!

 

[troystg]

Very nice.

I've made the same mistake myself many times...

Red RCA's are on the left side.

 

[hanair]

Very nice.

I've made the same mistake myself many times...

Red RCA's are on the left side.

Good catch! I had that in my mind while installing RCA's and I still made that mistake

Thanks for pointing that out!!

 

[troystg]

If you decide to change them I would recommend twisting the speaker leads too. Reduce the loop area as much as possible.

But beautiful layout and design!

 

[selwe]

Compact build using 2x24 SMPS in series with some extra filtering and 2x4700uF reservoirs. Couldn't wait for a bluetooth module, I think I had left enough room in there. LM3886 based on 00940 design.

 

[frontier9]

My very prototype style of build ... this my 4th working listening amp/pre-amp.
Bridged TDA2030 for sub and a single TDA2030 for mono-mix mid/top. To be upgraded to stereo in future.

 

[denbret]

PSU + OP

Hi all,

Here is my PSU + OP. I put the OPA1692. The PSU is very quiet.

The PSU are Erno Borbely super shunt regulator