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Post pics of your builds.... - Page 588

post #8806 of 9604

Finally finished trouble shooting and casing up my Objective 2 build.  Slightly taller enclosure than the BOM enclosure to allow space for 1/4" output jack and RCA inputs in a more normal desktop configuration.  Used a drillpress on the included faceplates.  Not ready to drop $30+ to get slightly better finish since this is such a cheap build.

 

 

 

 

 

post #8807 of 9604
Quote:
Originally Posted by FraGGleR View Post

Finally finished trouble shooting and casing up my Objective 2 build.  Slightly taller enclosure than the BOM enclosure to allow space for 1/4" output jack and RCA inputs in a more normal desktop configuration.  Used a drillpress on the included faceplates.  Not ready to drop $30+ to get slightly better finish since this is such a cheap build.









Very nice. I'm considering purchasing a JDS O2/ODAC myself.

This is off topic, but relevant to the ODAC, what advantages do RCA connections have? I only have 1 piece of audio equipment that uses it (home receiver), but it seems to be pretty popular here on Head-Fi. If I'm looking for a versatile DAC, should I buy the one with the RCA inputs even if I don't exactly know what they're for?
post #8808 of 9604
popular? its a decades old completely dominant worldwide audio standard that has been used on TV,s, Video players, CD players, Preamps, Dacs, etc etc.... for one separate connections make for lower crosstalk and you dont short the connection plugging in/out, more rugged etc.

but its nothing fandangled, thats really surprising you have only one piece of gear that has them, that surprises me, your house must be full of low level consumer gear. stuff that does audio as a secondary function, not purpose built audio gear

if you will be using it at home, I would be recommend using it if you can, or better yet just build them into one enclosure and connect directly with wire.

no offense, but how old are you?
Edited by qusp - 10/19/12 at 3:08am
post #8809 of 9604
Quote:
Originally Posted by qusp View Post

popular? its a decades old completely dominant worldwide audio standard that has been used on TV,s, Video players, CD players, Preamps, Dacs, etc etc.... for one separate connections make for lower crosstalk and you dont short the connection plugging in/out, more rugged etc.
but its nothing fandangled, thats really surprising you have only one piece of gear that has them, that surprises me, your house must be full of low level consumer gear. stuff that does audio as a secondary function, not purpose built audio gear
if you will be using it at home, I would be recommend using it if you can, or better yet just build them into one enclosure and connect directly with wire.
no offense, but how old are you?

OK, 1 that's the kind of answer I was looking for.
2. I know RCA connections are used for L/R audio channels and video for TV's and video players...I was asking about audio gear in particular since I have little experience with home audio equipment (as opposed to portable audio equipment).
3. 21 years old
post #8810 of 9604
I asked about age simply because its a more recent development that audio gear doesnt always have them. even 10 years ago consumer audio gear would have them, even a 'boombox' would have them. lately with the invasion of ipods into the home and form before function design, they have started to disappear from all but separates. many wont even have a minijack, just an ipod dock, or wifi. all making quality worse, not better.
post #8811 of 9604

Dayyym!

 

*tries to imagine a world without RCA's...

 

*brainplosion.

post #8812 of 9604
Quote:
Originally Posted by miceblue View Post


Very nice. I'm considering purchasing a JDS O2/ODAC myself.
This is off topic, but relevant to the ODAC, what advantages do RCA connections have? I only have 1 piece of audio equipment that uses it (home receiver), but it seems to be pretty popular here on Head-Fi. If I'm looking for a versatile DAC, should I buy the one with the RCA inputs even if I don't exactly know what they're for?

 

Qusp already answered about the RCA's purpose.  For me I wanted separate enclosures simply for flexibility.  This way I can use the ODAC with other amps and the O2 with other DACs to allow me to find the combo that works best for my needs.  Plus I think little matching stacks are fun and I love to build cables.

post #8813 of 9604

I have something in my mind for a year now...

First, I really like the ODAC. When I bought mine, the first thing I noticed how small it is. I started wandering if I could design some components in the same form factor, and build something compact high-tech system based on them.
This is how the idea came of the small form factor relay stepped attenuator (size almost matches the ODAC), it is an easy stack design (do I wanna few more channels? cool.gif).
It was is very fun!

It is up and running on the test bench now in single ended:

 


in system (left) - Closeup (right):

 

(I put there match box for reference)

 

I have not decided on the case yet, I need some time to think.


Edited by earfanatic - 10/19/12 at 10:28am
post #8814 of 9604

Hi guys,

 

Thought I'd post my latest.... I built my 2ch b22 a while ago, but had issues with wiring in the Pot.... all sorted and finally in it's custom hardwood w/ plexiglass top!

 

hope you like!

 


Edited by wankski - 10/21/12 at 9:11pm
post #8815 of 9604
Quote:
Originally Posted by wankski View Post

 

 

 Image fixed. Very nice, I am planning to do something similar for my Lovely Cube, so I can stack my Bottlehead Crack over it. I've got in a whole pile of Alder wood - now I just need to find a table saw. :)

 

Any concerns about heat? Or any ventilation built in?

post #8816 of 9604
Quote:
Originally Posted by qusp View Post

I asked about age simply because its a more recent development that audio gear doesnt always have them. even 10 years ago consumer audio gear would have them, even a 'boombox' would have them. lately with the invasion of ipods into the home and form before function design, they have started to disappear from all but separates. many wont even have a minijack, just an ipod dock, or wifi. all making quality worse, not better.

 I agree minijacks are evil, I killed one of the inputs to my TV by not plugging one such connector in far enough.  

post #8817 of 9604
Quote:
Originally Posted by drez View Post

 I agree minijacks are evil, I killed one of the inputs to my TV by not plugging one such connector in far enough.  

yup, thats another fail on their part, it shorts the outputs/inputs to ground plugging it in or out. things were designed for telephone switchboards in the mono form, not hifi equipment in the stereo format...
post #8818 of 9604
Quote:
Originally Posted by earfanatic View Post

snip/
It is up and running on the test bench now in single ended:
/snip

is there another way to run it? wink.gif

a few more channels for what? dont say surround? the ODAC is async and async only, meaning there is no way to synchronise the clock to multiple dacs, so there will be phase differences between the different drivers that will probably change each time you turn the system on and each time it changes samplerate, not so hot for multichannel or digital crossovers.
Edited by qusp - 10/22/12 at 9:38am
post #8819 of 9604
Quote:
Originally Posted by qusp View Post


is there another way to run it? wink.gif
a few more channels for what? dont say surround? the ODAC is async and async only

As it has only one relay board now it can not attenuate balanced sources. Well you are right, the prototype shown is only single ended.

I did not say it only works with the ODAC. Why would it? I just made it small.

For the matter of fact, I wanted only single ended and put the whole thing below an ODAC to occupy the least space in a very compact box.

In the design process I realised it can have more channels easily.

Someone may find it useful or may not, I do not know yet. But I agree there is no use of the ODAC with multichannel.

 

I admit I have strange ideas on casing something: my initial idea was to make a wooden box with front panel almost just enough big to look good with a 50mm knob. But my woodworking skills are... lets say not even developed yet. wink.gif


Edited by earfanatic - 10/22/12 at 11:48am
post #8820 of 9604
Quote:
Originally Posted by earfanatic View Post

I have something in my mind for a year now...

First, I really like the ODAC. When I bought mine, the first thing I noticed how small it is. I started wandering if I could design some components in the same form factor, and build something compact high-tech system based on them.
This is how the idea came of the small form factor relay stepped attenuator (size almost matches the ODAC), it is an easy stack design (do I wanna few more channels? cool.gif).
It was is very fun!

It is up and running on the test bench now in single ended:

 


in system (left) - Closeup (right):

 

(I put there match box for reference)

 

I have not decided on the case yet, I need some time to think.

Lookin' good!

Just a few questions....

how many steps does it have?

does it use a logarithmic resistor ladder? or just something like rotary stepped-attenuator with relays instead?

what relays are you using? (that thing looks really small....)

what are you using to control the relays? standard logic or microcontroller?

it that a pot or rotary encoder behind that gold knob?

Thanks! because I'm thinking of building one too... biggrin.gif

 

Quote:
Originally Posted by wankski View Post

Hi guys,

 

Thought I'd post my latest.... I built my 2ch b22 a while ago, but had issues with wiring in the Pot.... all sorted and finally in it's custom hardwood w/ plexiglass top!

 

hope you like!

 

Very nice! So many heatsinks eek.gif

 

btw, why's the power switch in a seperate box? 

or it the transformer in there as well?

 

and what happened with the pot?

 

lol I'm a curious person biggrin.gif


 

I've recently made some pot. mounting PCBs for my builds and the manufacturer sent me twice the quantity I ordered! (20)

So I was thinking if anyone here wants them? I have 10 leftover now. 

Ofcourse, I will not pay the shipping...

 

It's designed for the ALPS RK097, but will work with any other pot with a similar footprint.

Also, it's got a common ground connected. (see PCB trace below.)

 

1000

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