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Post pics of your builds.... - Page 257

post #3841 of 9592

my PPA v1 (chip-based buffs) in black hammond

this is a work-in-progress but I've got the front panel completed and only the rear panel is TBD (waiting on some parts).

lettering is old school 'datak' rub-on letters. these were left over from about 20 yrs ago and I'm surprised they even still work.

plastic panel is some thin cut-to-size stock at my local plastic (TAP plastic) store. its easy to work, it shows NO fingerprints (lol) and its forgiving if you slip up. not really strong but its strong enough for a poor man's 'FPE' sort of

neutrik all-black socket from parts express. I went out of my way to find a black/black neutrik and PE had it all along

the PPAv1 normally has no bass 'control' but it was easy to add. you can see the wima's sitting directly on the bass control (rear view).

for the phones-out, I snaked the 3 needed wires from *under* the board thru a drilled rubber grommet up front. its a bit neater that way, I think.

I used machined pin ic sockets to make a quick-release interface for all the front panel controls. now I can unhook the front panel for service and that was worth the extra effort (soldering, heat-shrink tubing and all that). some more still has to be done before I'm really finished, and then the whole socket bundle (per group) has to be tape insulated or something, for when you stuff the wires inside the box.

there are 4 buffers per channel (fully maxed). these are the buffers you CAN buy (ahem! cough.) but they still aren't cheap (about $5 each chip).

the op-amps are very old samples (again, maybe 10 yrs old) of BB opa627 chips with the center being an ad8610 on a browndog adapter.

resistors are vishay. caps are generally whatever I find at my local surplus shop

pics follow-









update: added a bantam dac 'plugin' for fun



post #3842 of 9592
Quote:
Originally Posted by Beefy View Post
The design of that starving student is absolutely outstanding. Well done!
Thanks

Quote:
Originally Posted by Fred_fred2004 View Post
Really impressive, wish I could do case work to that standard, top job
It's not too bad, spent a little time laying everything out and then took my time with a drill press. But having the tools or knowing how does really helps.

Quote:
Originally Posted by linuxworks View Post
nice job, e36! you gonna add a 'dinan' badge to it?
Haha, DINAN... just like AMG. A little HP and a lotta $$$
post #3843 of 9592
in a past lifetime, I was heavily into the dinan m3 thing. dinan is a few miles away from where I live...

you think high end audio drains wallets? pffft! start modifying CARS and then you see what real wallet-emptying is all about. custom suspensions at dinan were in the $1000+ range, just to start. and lets not even talk about dinan custom exhaust prices..
post #3844 of 9592
I finished this mini3 a couple days ago.
Front

Back
post #3845 of 9592
Quote:
Originally Posted by linuxworks View Post
in a past lifetime, I was heavily into the dinan m3 thing. dinan is a few miles away from where I live...

you think high end audio drains wallets? pffft! start modifying CARS and then you see what real wallet-emptying is all about. custom suspensions at dinan were in the $1000+ range, just to start. and lets not even talk about dinan custom exhaust prices..
Yea, I'm already in the dog house with my M3, but every time I take it to the track I'm reminded that I'm not completely crazy.... yet!

post #3846 of 9592
Quote:
Originally Posted by Beefy View Post
The design of that starving student is absolutely outstanding. Well done!
x2

I think I saw a similar design a while ago in the SS thread and was floored by it. The tubes inside the heat sink is such an elegant way to present a nice compact package. edit: question retracted. Just noticed your BOM was up on SS page.
post #3847 of 9592
Here are a couple of Bantam DACs
post #3848 of 9592
I finished my PPA v1 and also customized a Bantam DAC to fit it in a special way







[img]tttp://farm4.static.flickr.com/3057/3071869609_6e7cb5a446_o.jpg[/img]



I first converted my 'cable DAC' to having 2 gold rca jacks. that was a feat in itself given the tiny clearances in using the 'supplied' box. I did find 2 'odd' positions to place the rcas in the bantam and that basically determined where my rca's would go on the PPA chassis back.

the whole idea, as you can see, is to have a 'pluggable module' that reduces cable length and almost eliminates cables entirely just a male-male rca barrel adapter is used as the 'wiring' between the PPA and the DAC.

kinda cute, no?
post #3849 of 9592
Looks great - a neat idea for the Bantam!
post #3850 of 9592
thanks tom

did you notice that I used 'felt pads' (sticky round things you buy at hardware stores) under the metal nuts (need to find black ones) as a non-scratch support attempt

even still there isn't enough height to make it sit flat with the PPA hammond box. the dimensions just didn't work or I'd have the rca jacks hitting the PPA pc board. but it would have been neat to have them both sit on the table, flat, which was my intention.

NO one can complain about 'analog cabling' since there really isn't much to complain about (heh)
post #3851 of 9592
Preview of things to come....


post #3852 of 9592
Nice
post #3853 of 9592
Working on a line preamp. Here's the main board in progress. will have 7 digital inputs and 7 analog inputs as well as a 64 step relay volume control an LCD display and NOS DAC onboard. Using ULN2001 relay driver, 2x74145 3 bit to 8 line relay drivers, and a BasicX24 microcontroller to power the whole thing.

Any thoughts?
LL
post #3854 of 9592
post #3855 of 9592
Quote:
Originally Posted by Captain Ødegård View Post
Nice wooden iPhone stand Captain!
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