- Dec 28, 2009
Member Vkung of vkmusic in Canada was kind enough to send me this product for review. http://www.vkmusic.ca/
It's a portable kit intended for an outboard supply or battery. The supply is optional and does not charge a battery. I haven.'t really read the instructions other than parts position and wiring diagrams so I'll fill in more about it in the review portion. I wanted to post pictures and describe the build which was quite easy and quick for me but I'm used to a soldering iron.
Contents and carton:
Example of instructions with description of different gain options:
I built at standard 11 times gain.
Bottom of board after components installed:
Top of board after components installed. Op Amps shown come preinstalled:
After supply leads secured:
This is about 1 hr in from the first shot.
How it sits in the anodized aluminium case:
Front and back are nicely done plastic. If it weren't for review, I'd lose the front sticker because it detracts from a otherwise nice looking piece. Kit did not come with nuts for the jacks so the only thing securing the board to the face is friction and the positioning of the volume knob. Haven't mentioned it to vkung yet. Easy fix and believe it or not, it feels secure as is. I would still like more. I may throw a couple screws in the track at the back edge of the board. It would be even more secure than the common nuts at the front method.
Finished amp, front, with tools needed. Allen was given and no soldering iron shown:
Back showing PS jack and thumb screws for quick battery access:
So from start to finish, it's about 1:15 if you can solder and are handy. Took about 1:30 with pics and some conversations. Probably up to 3 hrs for normal DIY taking this on as an early project. For those trying this sort of thing for the first time, learn how to flow solder and practice a bit.
The board and parts are of better quality than others I've done and the board is 2 sided so flowing properly helps. Parts position markings on the board and the way the parts are presented in the packaging makes it a breeze to populate the board. I didn't have a small tip for my iron handy so I made do. It's not rocket science. Leave the leads long and cut after soldering.
I'll do a listening and possible tweak review within a week. There's an output coupling cap and resistor at the output so since the amp chip has some momentary short tolerance, I may negate the resistor to see if it holds up. I may also bypass the coupling caps (adding a small value cap in parallel) to see if it improves things. Haven't even turned it on yet so fingers crossed. LOL