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Today's Featured Head-Fi Blog: A Japanese headfier's monologue (Sasaki)
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Well, here we go again. This is my First amplifier, rebuilt. Basically the only similarities it has with my first one is a couple of the parts like coupling caps and headphone jack are the same. the rest is basically a clone, of my second version. But i decided to make some improvements on the case, piano black finish which is 2 coats of flat black, then 5 coats of clear. Both the chassis are made of stainless steel and the covers are aluminium.
All the basics, gold rca jacks, high quality parts inside and out. The accent peices down the sides of the covers are stainless steel which is just sanded to achieve the brushed look. Overall im quite pleased with this amp, it sounds great and i believe is the best thing i have made yet, considering its all from scratch. PCB, Chassis, everything i have made.
And yes this is an RA1 clone, just with a few improvements. There is no LED for power indication because i dont need it, it just wastes battery power. And i happen to like my case a bit better than theirs.
Hope the pic isint too big. I optimized it and made sure it wasnt gonna be any bigger than anything else thats been posted.
I finished off my PIMETA over the weekend. There are some pitures in my gallery. Some brief specs:
ALPS 'Blue Velvet' pot
AD8610/8620 op amps
24v DC wall wart power
White LED - I don't think it's actually white, just a veeeery pale blue .
The rear panel looks a bit dodgy around the DC socket, as I had to drill to the largest bit I had, then hack the rest out with a knife . Also, I had to mount the front most capacitor horizontally in order to fit the output socket on the front panel .
Thanks to all those who helped with the construction, particularly Magsy .
Wow nice photography (nice looking amp too )... Digital SLR? The depth-of-field doesnt seem doable with a regular digicam.
phobus,
Thanks . I'm pleased with how the amp turned out (eventually ), it loooks pretty good. I think the all-black look works quite well.
Yep, DSLR - Canon 10D with a 50mm f1.8 lens @ f1.8 - I wanted to take the shots in natural light (i.e. without flash), and I couldn't be bothered to set up the tripod . Maybe I should make the effort and do some proper shots, but that will have to wait for next weekend.
Yes, I designed and built the case The smaller thickness case on the left is the power supply portion that has the batts and switch in, and the other side is the amp portion with just the amp. Its all connected with a sortof umbilical cord.
haoleb, great casework! It's exotic-looking enough that I think it deserves a better circuit than the RA-1 clone.
Thanks, Probbly so true as well, But the ra1 circuitry is the first amp i have built and its so simple and easy to build. It is a step above my soundcard output and i can also hook up phones to a regular line source through the rca jacks. Im not going for super fidelity in this thing but its certainly decent enough.
I'll tell you that paint job was the most stressfull part of the whole thing. One slip up and the whole dang thing is ruined. The time it takes for that lacqure to harden seems to take forever, sorta is too. about a week. I was originally going to make those side things out of polished copper but after i had the rest done i decided to go with the stainless instead since it would match everything else, and the copper wasnt polishing up the way i wanted it to look. Im pretty happy with the stainless though.
custom built?
.
. Also, I had to mount the front most capacitor horizontally in order to fit the output socket on the front panel 
)... Digital SLR? The depth-of-field doesnt seem doable with a regular digicam.
), it loooks pretty good. I think the all-black look works quite well. 
. Maybe I should make the effort and do some proper shots, but that will have to wait for next weekend.
Linear Mode
