Topic: Schoeps CMR battery box (photos inside)

[jerryfreak]

based on this simple circuit from bernhard:

http://simplefuels.com/CMR.jpg

i still have one more coat of potting compound on the internal components to the right of the battery.

http://flickr.com/photos/10466474@N04/2877613432/

http://flickr.com/photos/10466474@N04/2876776503/

i hooked it up a few days ago, and the battery is still powering the mics fine, thats a good sign. Smaller batteries may be a good direction to take it.

i used 5-pin mini-xlr jacks for both input and output, but you could also do it with 4 pin mini in and 3 pin mini out (unbalanced in and out, power is 4th pin on input), would be cheap 'dont plug it in backwards' insurance. A 3-pole stereo minijack out would also work. space was a little tight inside that hammond case, but it worked, and is pretty small. mini xlrs are solid connectors, and you have unlimited options for in and out breakout cables

[johnw]

Awesome! Do you have any interest in making/selling these for those of us who are not EE inclined? +T

[johnw]

Also, what are you using to apply gain? And weren't you looking into using the Nady XLR adapters for P48 usage?

[johnw]

Also, what are you using to apply gain? And weren't you looking into using the Nady XLR adapters for P48 usage?

EDIT: I read the preamps for pu$$ies thread.

[jerryfreak]

i havent tested msh's phantom circuit yet, got sidetracked, but thats next up!

[ianstone]

Awesome! Do you have any interest in making/selling these for those of us who are not EE inclined? +T

i'll second that.

[takes a number and gets in line]

[jerryfreak]

well.. i am going to the electronics store today...

but i dont think any of you guys even own CMRs!

Awesome! Do you have any interest in making/selling these for those of us who are not EE inclined? +T

i'll second that.

[takes a number and gets in line]

[ianstone]

well.. i am going to the electronics store today...

but i dont think any of you guys even own CMRs!

Awesome! Do you have any interest in making/selling these for those of us who are not EE inclined? +T

i'll second that.

[takes a number and gets in line]

i dont, but i would buy them if you'd make me a setup with them to use with the MK capsules

then sell my cmc6's and kc5's

[jerryfreak]

i can let you try out mine if you wish ian. i'll be seeing you no later than halloween umph, right?

well.. i am going to the electronics store today...

but i dont think any of you guys even own CMRs!

Awesome! Do you have any interest in making/selling these for those of us who are not EE inclined? +T

i'll second that.

[takes a number and gets in line]

i dont, but i would buy them if you'd make me a setup with them to use with the MK capsules

then sell my cmc6's and kc5's

[johnw]

well.. i am going to the electronics store today...

but i dont think any of you guys even own CMRs!

Awesome! Do you have any interest in making/selling these for those of us who are not EE inclined? +T

i'll second that.

[takes a number and gets in line]

I don't either, but am looking to get a smaller footprint and the CMRs or Nbox looks to be the way to go. If you're building these things, I could pick up the CMRs after selling off my current setup.

[jerryfreak]

ok, im thinking about making a handful of these and would like a show of hands on who is in.

-4-pin mini xlr input, with 4-pin to (2) 3pin breakout cable.
-3 pin mini xlr output, with options for 3-pin to two xlrs or 3-pin to 1/8" mini
-4-pin extension cable (stereo) to allow you to run a single stereo cable up to where you y-it to the mics (my mics have 2m cables)

all cables will be shielded schoeps cables identical to the factory cmr (single channel) or kc5 (stereo) cables, switchcraft mini xlrs, neutrik full-size xlrs

battery box -  $50
input y-breakout cable (short) - $50
3-pin mini xlr output cable to 2x straight or RA xlr - $50
3-pin mini xlr output cable to minijack - $35
4-pin extension cable - 5 meter kc5 style cable - $100

those are mostly materials costs, most of the mini xlr and xlr fittings are $10 each after shipping and the schoeps cable is up to $16/meter. so im not in it for the money obviously, making $20 or less per component. I am gonna make myself a second-gen unit and would rather bang out a few at a time, all universal so we can all get along in the field.