Chip Amp Photo Gallery

[Mr. Triatic]

alright, here's another compared to two matches..

[seventenths]

Mr. Triatic,
just plain "sweet"...


7/10

[gainphile]

Originally posted by john blackburn
RobertJ88



I'm 47 and I've just finished my first amp, it's nowhere near as good as yours, beautiful work by any measure.

John

I agree, I am twice your age and my build is nowhere close to that!... very solid.

[bego2]

nice work Robert.

[Nordic]

If I may add, something I saw in te NASA photoguidelines I posted before. That braided sleeving... the ends should idealy be rolled back inside the tube... preventing it from fraying...and also providing protection from cable tie stresses...

[robertj88]

Originally posted by tubee
Nice amp Robert!!

1 suggestion: try to get proper solid copper rails instead of the aluminium ones.

Good one! Soon I will start making some drawings.
I really like the shine of polished copper.

Originally posted by Nordic
If I may add, something I saw in te NASA photoguidelines I posted before. That braided sleeving... the ends should idealy be rolled back inside the tube... preventing it from fraying...and also providing protection from cable tie stresses...

I didn't know that technique, thanks for the tip.
Usually I melt the endings of the sleeving, en finish it with some heat shrink...

offtopic

*searching for a old cable*

Found something, this one isn't neat, but you get the point...


clickable

/offtopic

Thanks for all the compliments!

[zebra100]

I have finally finished my Peter Daniels LM3875 Premium kit. It is a dual mono setup, with a passive pre (pot in a box type). I had a few minor issues with ground hum, but I sorted it with heavy duty ground cables and 10 Ohm ground lift resistors on each channel.

My total spend on the Gainclone and Pre was around the £150 mark, and well worth every penny. I could have spent more by using more expensive components, i.e Black gates in the PSU rails (not everyones cup of tea) or a more expensive case, but on balance I think I got the mix right. Sound for pound/bang for buck, the Gainclone has to be up there with the best.

The cases are from hifi2000.com (Italy) and the transformers are 18V/120VA from RS Components (UK). I used an Alps Blue 50K dual log pot for the volume control (HiFi Collective)

My review,

Kit, Lightly modded NAD C520 (Schotky diodes, Black gates in output, Muting transistors removed, NE5532 Op Amps replaced with LM4562NA Chips), NeoTech/Puresonic IC's, Wharfedale Diamond 8.3's with IXOS Bi Wire cables, Olson mains conditioning block. Test track's, Leftfield - Phat Plannet, Dark Side of the Moon - Speak to Me/Breathe/On the Run/Great Gig in the Sky, Led Zeppelin - Kashmir/Over the Hills and Far Away, Holst - The Plannets (Mars).

This Gainclone produces an open and detailed sound. The timing is precise, with no mushyness in the top end. Cymbals and snare drums are faithfully reproduced and vocals are clear and precise. Mid's and high's are especially open and detailed. Bass is a little lean, but well presented and controlled. IMO


I am more than happy with the amp. For a first attempt at DIY, I am blown away with what is possible for just a small outlay.

[zebra100]

The picture on my previous post is a bitt naff, so I have enclosed another.

As you can see, I have only used small external heat sinks. The 3mm aluminium panel seems to do a good job. Even if I listen at high volume, it doesn't get too hot.

[zebra100]

I can't seem to post more than one pic at a time so here is my last picture.

You can see the ground lift resistors in the middle of the picure. Also, on the R/H transformer you can just about see the extra winding for the blue LED on the fromt panel (18 turns of insulated copper wire, directly soldered to the LED).

[zolta7]

Big Brother

4xLM4780 (balanced)