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Post pics of your builds.... - Page 261

post #3901 of 9172
12/8/08 at 8:04pm

getting very small

I etched this last night going to use 805 resistors and opa2132, There is no room left on the board this may be the limit for home etched single sided boards. No drinks Friday night I will need a steady hand to do this
LL
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LL
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post #3902 of 9172
12/9/08 at 12:32am
a Partial Pimeta(tm)



still need to build the buffers.
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post #3903 of 9172
12/9/08 at 1:34am
Those resistor sockets are they from an ic socket? they look very useful
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post #3904 of 9172
12/9/08 at 2:09am
yes, they were painfully yanked out from a plastic IC socket
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post #3905 of 9172
12/9/08 at 2:45am
do there exist single sockets directly from the suppliers? I have always wondered this, as I have often heard people say "why don't you just socket resistor-x, and substitute resistors to your liking".
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post #3906 of 9172
12/9/08 at 2:54am
Quote:
Originally Posted by chobint View Post
do there exist single sockets directly from the suppliers? I have always wondered this, as I have often heard people say "why don't you just socket resistor-x, and substitute resistors to your liking".
the "center part" on the pimeta is designed to accommodate a (dont remember how many pins) socket directly.

If you use smallish (RN55 or similar) resistors they fit right in there.

There are some drawbacks, but it allows you to experiment with different multi-loop ratios. I have never done that, but gather it could hold some sonic gems.
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post #3907 of 9172
12/9/08 at 2:57am
Quote:
Originally Posted by chobint View Post
do there exist single sockets directly from the suppliers? I have always wondered this, as I have often heard people say "why don't you just socket resistor-x, and substitute resistors to your liking".
Yeah, you can buy SIP sockets and cut off one or more as you need them. I haven't ever seen single ones before, and they'd probably be more expensive than the same number in a long strip anyways. If it's not going to be in a row with others, I usually break the plastic off the pins (just a good squeeze with some pliers and it cracks right off) so they end up looking just like the ones in linuxworks' photo.
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post #3908 of 9172
12/9/08 at 3:02am


Example with break away, machined SIP Sockets.

Edit:

Here is a better pic:

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post #3909 of 9172
12/9/08 at 4:35am
Quote:
Originally Posted by nikongod View Post
the "center part" on the pimeta is designed to accommodate a (dont remember how many pins) socket directly.
it works. I actually used a SIP socket with every other hole filled in (just as a 'key'). you can see it, to some degree, here:



I used one sip socket below and one above connected to the cable to form a 'connect'

here's another shot of where I'm at right now with this. it works REALLY REALLY WELL. I might say it sounds better than my PPA V1 but that just can't be....



I'm using the LMH6321 part here (damn, that thing gets hot to the touch during use!) on 'poor mans browndogs' (lol).

did I say it works well? man, it works really well

and now my pimeta is a 'module' with all the ins, outs and power quick-disconnect. me likes


note that I cut off part of the PCB near the pots since I was not board mounting them and might need the extra box room, inside. I mounted a 3 term molex post for the audio-in (coming from the pot on the panel) and one way in back standing on its own 2 legs, for power. kind of resting near that zener, like its a park bench (lol).
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post #3910 of 9172
12/9/08 at 1:52pm
Quote:
I'm using the LMH6321 part here (damn, that thing gets hot to the touch during use!) on 'poor mans browndogs' (lol).

did I say it works well? man, it works really well
Yeah, the lmh6321 are great chips.

Quote:
and now my pimeta is a 'module' with all the ins, outs and power quick-disconnect. me likes
Looks like a pimeta build by someone who's spent too long doing OOP. How many classes do you have there?
...I do like that kind of modularity too Looks great.
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post #3911 of 9172
12/9/08 at 1:57pm
Quote:
Originally Posted by rds View Post
Yeah, the lmh6321 are great chips.
I wish I could make use of the metal heatsink area under the LMH chips.

I also would like to find out what the 'thump' is all about on these. I kinda like it but tangent thinks it may be unnatural or actually a distortion. I'll try to find out since I'm now curious.

Quote:
Looks like a pimeta build by someone who's spent too long doing OOP. How many classes do you have there?
...I do like that kind of modularity too Looks great.
I hate c++ though - I still prefer regular old ansi C

my building style has changed over the years. it used to be all about the outside panel and the inside would be 'demons' but now I try to make the inside as nice as I can, too. after you've removed things so many times, quick-connect style is a must-have!
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post #3912 of 9172
12/9/08 at 3:32pm
Quote:
Originally Posted by linuxworks View Post
and now my pimeta is a 'module' with all the ins, outs and power quick-disconnect. me likes
It's nice I'm experimenting in my last build with jumpers and pins headers to achieve similar things.
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post #3913 of 9172
12/9/08 at 4:15pm
more detail on the line-in offboard connector. I lucked out that things 'worked out' there was a strong ground on top (to solder the middle wire to) and that also makes it strong enough to support itself. the other 2 meet at traces that used to go to the line-in pads but that part of the board was cut of (by me) to make the board physically smaller.



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post #3914 of 9172
12/10/08 at 10:55pm
Nice job... I should have used some of the KK connectors on the Pimeta I built for my son.

BTW, what are the blue resistors? I thought they were Vishay CMF, so ordered some from Mouser but got tan resistors?
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post #3915 of 9172
12/10/08 at 11:12pm
thanks. yes, they are vishays from digikey. they're pretty, huh?



that was a previous build and I used almost entirely just that R series. had to go with a 'vishay equiv' for the 1M since that's not in the shiny-dark-blue series, it seems ;(

I think they were not too cheap - over a quarter each. for a resistor, that seems obscene to me, but I don't use *that* many of them.
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