My first chip amp

[edjosh23]

Congradualations Enigma,

Any other projects in mind once you have finished?
Do you know what type of volume control your going to use on your final amp?

and the chassis looks similar to mine too 😀

Josh

 

[uvodee]

still looking for some nice knobs in gold

bought some more knobs from a guy who makes repro's from les paul 1950's guitars but they are for 1/8' shaft...

 

[uvodee]

PIC #2

kind of a simple looking case

J-P

 

[uvodee]

another pic

actually it looks quite boring....

J-P

 

[uvodee]

yes yes blue light

looks empty,

am getting some letraset to put on my brand..
h.e.a.r.

stands for high end audio reproduction

j-p

 

[uvodee]

last on of this serie

still looking for knobs to put on the small shafts


j-p

 

[uvodee]

technical

boards from our house supplier...

but regular bridge rectifier...

2 simple trannies from rs, 12-0-12 5 amps

sound is ok, but only for classical, and jazz, nothing else

I used abbot tech trannies (from apexjr. in other projects, and they are better for rock etc... ( more lower) !
Unfortunately they are soooooooooo heavy and chunky, no enlcosre will hold them ....

J-P

 

[BrianGT]

Re: technical

boards from our house supplier...

but regular bridge rectifier...

2 simple trannies from rs, 12-0-12 5 amps

sound is ok, but only for classical, and jazz, nothing else

I used abbot tech trannies (from apexjr. in other projects, and they are better for rock etc... ( more lower) !
Unfortunately they are soooooooooo heavy and chunky, no enlcosre will hold them ....

J-P

I put your pics in my gallery here:
http://www.briangt.com/gallery/nigc-uvodee

Let me know if you have any more.

--
Brian

 

[uvodee]

many more

but too boring to look at

this is the finalized one WITH the Les Paul cloned knobs...
diamond cut side surface

J-P

 

[uvodee]

and one more for the road

scratch does not seem to be visible without camera...

I am getting letraset in Seattle next week (at UW bookstore)
Seattle art (as advertised in the letraset website should have been an outlet... should have been is the right wording!


J-P

 

[phugger]

Ok, I'm having a little trouble getting started. There's so many different schematics out there and I don't know which one to use. I'm looking at the one from http://www.vikash.info/audio/gainclone02/

I assume that Cs is the 1000uf capacitor?

Also, over here http://www.geocities.com/rjm003.geo/rjmaudio/diy_gc.html they have C1 to protect my speakers from DC offset. Can I use any polypropylene cap here? I have some polypropylene caps (Panasonic 50V .1uF and Wima .1uF 100V) lying around that I use for headphone amps.

And I can't seem to find what the panasonic 4.7uF Panasonic electrolytic cap is for in briangt's igc user's guide. I mean I know it's for the rectifier bridge, but I don't know where it would be placed in the circuit.

 

[BrianGT]

I resurrected this old chassis today for my first LM3886 amp with snubber supply:

An externally hosted image should be here but it was not working when we last tested it.

more pics:
http://www.briangt.com/gallery/lm3886amp

😀

This chassis has housed 7 different gainclone amps thus far:
- my first p2p prototype LM3875 IGC amp (lifetime = 3 months)
- my first p2p/perfboard LM3875 NIGC amp (lifetime = 1 month)
- Eric's (ENIGMA) first p2p/perfboard LM3875 NIGC amp (lifetime = 2 months)
- my first LM3875 NIGC with my rev.1 pcbs (lifetime = 3 months)
- my second LM3875 NIGC amp with rev.2 boards and BG STD 1000uF caps (lifetime = 7 months)
- my first LM4780 amp build with the kit (lifetime = 1 month)
- finally, this amp, my first LM3886 NIGC with snubber supply
http://www.diyaudio.com/forums/showthread.php?postid=581171#post581171

IGC = inverted gainclone
NIGC = non-inverted gainclone

This is quite a good prototype chassis 😀

--
Brian

 

[karma]

yes indeed verry nice😀

 

[sr2002]

can u please send me the schematics and if possible pcb layout