• The move to the new server is done. There are some software and database maintenance updates in process. This has us passing the hat around to help out. We appreciate any donations. Seriously, even a dollar helps. The payment page may be found here - https://www.audiokarma.org/support.html

Amp Camp Amp

You know what would look cool on that little stereo ACA amp. A black anodized 1/4-3/8" aluminum faceplate with the center cut out in a circle to reveal the power switch. Maybe an inch or a little more reveal all the way around the switch. It would look like a black widow.
 
Thanks everyone for good advise.I am going to pair it with SSP as it has good amount of gain.

Regards,
Sachin
 
nj pheonix said:
OK I read this from the beginning. At the risk of sounding stupid (maybe this is an extension of a previous thread). What is this? (I get its a single ended integrated) but what else. Power expectations? Passive pre? It doesn't seem to have much transformer so I'm guessing its relatively low powered. Did anything preceed it? Mock up is pretty. The woodwork mock ups are works of art. Without the wood, is everything off the shelf? Could you estimate total parts cost? It looks like a cool project. Oh , any chance group build offer in the future. I'm about 4 projects behind. I really need to hit the bench.
Click to expand...

Sachin has several things going on in this thread.

The main portion of the thread is for Nelson Pass' "Amp Camp Amp,::

http://www.diyaudio.com/forums/diyaudio-com-articles/214808-amp-camp-amp-1-a.html

monoblock, single-ended 5W, class A. Sachin is just putting both of the amps together into one case (the red case with black heatsinks).


The other portion in his thread is just showing a case/layout for another project he did (black case). Looks to be:

CNC MM phono pre
SSP preamp
Nelson Pass B1 buffer (clone)
OPS (power supply)
input source selector
 
westend said:
Nice looking preamp! I like the layout of the internals.
The teak faceplate is something I could live with and gives the case a classy look.

I haven't done much with wood faceplates, maybe I should change on that. FWIW, I think Dodog and I are going to make some monoblock Amp Camp cases. There was talk of wood in our discussions. We'll see...

@ejfud--Gary, have you brought any of the local Electronic Brain Trust in on your problems?
Click to expand...

Tis true! I'm leaning for an all aluminum enclosure now after seeing all the awesome work you do. I'll stop hijacking Sachin's thread and get mine up at some point.
 
dodog said:
Sachin has several things going on in this thread.

The main portion of the thread is for Nelson Pass' "Amp Camp Amp,::

http://www.diyaudio.com/forums/diyaudio-com-articles/214808-amp-camp-amp-1-a.html

monoblock, single-ended 5W, class A. Sachin is just putting both of the amps together into one case (the red case with black heatsinks).


The other portion in his thread is just showing a case/layout for another project he did (black case). Looks to be:

CNC MM phono pre
SSP preamp
Nelson Pass B1 buffer (clone)
OPS (power supply)
input source selector
Click to expand...

Sorry for confusion caused by my side.Joel has rightly described everything.

Regards,
Sachin
 
dodog said:
Tis true! I'm leaning for an all aluminum enclosure now after seeing all the awesome work you do. I'll stop hijacking Sachin's thread and get mine up at some point.
Click to expand...

Lance's workmanship is top class:thmbsp: I have saved few pics of his past builds in my PC.

Regards,
Sachin
 
Boards soldered:
ck9y.jpg


we7n.jpg


I have used standard BOM by NP.That 3300uf caps was big dia for this PCb even lead spacing is 2mm bigger and thicker than PCB.My friend had to ream PCB holes to fit.I should have checked it first.I bought caps with 10mm lead spacing,7.5 MM lead spacing cap would have been a perfect fit.

Regards,
Sachin
 
Last edited:
dodog said:
Looking good, Sachin!

I assume the trim-pot is just hiding behind the giant cap?

I've had to ream PCB holes for larger-than-planned leads and found that a pin-vise is an invaluable tool (no affiliation):

http://www.staples.com/office/suppl...0&srccode=cii_17588969&cpncode=33-176504291-2

My local hobby store has an amazing selection of tiny bits and can order near any size if they don't stock it. Bits are never more than a few dollars.
Click to expand...
Hi Joel,
here is the trim pot.My friend has bend it for easy access for biasing.
zkiv.jpg


Regards,
Sachin
 
Test fit on heatsink:
qfkc.jpg

2gdt.jpg


PCB wire connectors
ryda.jpg


I will use heatshrink or Teflon tubing on 2nd Panasonic .47r resister as it seems to be little close to wire connector.This board is a single sided,so Mosfets needs to be soldered first before mounting.

Regards,
Sachin
 
Last edited:
Many thanks to all,
Finished except power switch.
Sounding very impressive, unbelievable ( really never expect this much quality from this small amp), very nice punchy and clean and perfect bass. By default bias voltage is 9.6v for each channel and increased to 10v. I am using Dell 19.5v /3.6A(60W) DC laptop charger. I have paired with my AR 2ax speakers, AMP driving perfectly those speakers. But i want to test with high efficiency (>90db)speakers. When i connected my mobile source i feel low gain, Connected through B1 buffer with SSP, gain also good along with SSP.
Many thanks to Nelson, Rudy and Sachin to get finished this perfect Cute AMP.
I am planning to go each amp as mono-blocks by bridging mode. I ran this amp more than 3 hrs using my home UPS with out any issues. Sachin will post the pictures.

Thank you
Raghu
 
Last edited:
Nice job guys, it looks great. I like the use of the solder-on blades for the connections. I may have to steal that idea for myself. Do either of you have a link to the part at Mouser or Digikey?
 
dodog said:
Nice job guys, it looks great. I like the use of the solder-on blades for the connections. I may have to steal that idea for myself. Do either of you have a link to the part at Mouser or Digikey?
Click to expand...

Hi Joel,
they are called PCB Tab Terminals.We bought them locally,but they are available on Ebay too.I have found following on Mouser

http://in.mouser.com/ProductDetail/Keystone-Electronics/1287/?qs=sGAEpiMZZMsQtlBhqKq43RXrh6HzuOwF

http://in.mouser.com/ProductDetail/Molex/19705-4301/?qs=1zQqmA4D1PiVRwChNlH8kA==

http://in.mouser.com/ProductDetail/TE-Connectivity-AMP/63824-1/?qs=2mZjssE3HVUsaGgaQRQHhQ==
Kindly check pitch spacing before buying.

Regards,
Sachin
 
Last edited:
My DYI experience is minimal ( I felt the need to qualify that before I asked the question.) Is that heatsink way oversized for this application?
 
nj pheonix said:
My DYI experience is minimal ( I felt the need to qualify that before I asked the question.) Is that heatsink way oversized for this application?
Click to expand...

No. These are class-A monoblocks and, as such, quite inefficient, which means heat. Perhaps you could get away with a slightly smaller heatsink but you'd risk burning up the MOSFETs.
 
nj pheonix said:
My DYI experience is minimal ( I felt the need to qualify that before I asked the question.) Is that heatsink way oversized for this application?
Click to expand...

Heatsinks are actually smaller than DIY audio store.They look bigger in pics.heatsink size is just 190x70x30 and total cab width is only 8.5 inches.I was worried about heat,but it does the job perfectly.It gets only warm.

Regards,
Sachin
 
OK thanks they look huge against the transistor. I didn't realize heat could efficiently dissipate that far out .
 
You must log in or register to reply here.
Back
Top Bottom