Electrodyne M100-A schematic

[mich]

Hi,
I have to rack up a few of these - anybody got a schematic/pinout or some direction where to look?

Thanks

 

[mich]

its a nice little 5 transistor  module,

only the white diodes dosent have markings on them.-1N4004 maybe?

what about working voltage?could be deduced from the schematic, but any guesses?

would like to add a finer gain control, maybe an attenuator, but we'll talk about that after sorting out the basics.

 

[gar381]

Contact Ken at orphan audio

http://www.orphanaudio.com/portfolio/electrodyne-m100-preamp/gallery/electrodyne/

I am Shure he can come up with a schematic/pinout

GARY

 

[mich]

Contact Ken at orphan audio

http://www.orphanaudio.com/portfolio/electrodyne-m100-preamp/gallery/electrodyne/

I am Shure he can come up with a schematic/pinout

GARY

Thanks,I'll try that.

 

[groselicain]

Hopefully no one is offended by my resurrection, but I wanted to see if mich ever got that schematic, or if he had ever traced out his own. Thanks.

 

[gar381]

Ken at Orphan Audio is Electrodyne

GARY

 

[gridcurrent]

there are apparently two versions of the plug in card for model E802 mixer.
early one is based on the 709 op-amp and features a 4 position front panel slide switch.
the later is discrete, very possibly the AM4 circuit and has a rotary gain control switch.
the early unit's pinouts largely agree with the B-100,
http://www.orphanaudio.com/wp-content/uploads/Electrodyne_B100_pinout.pdf
with a few additions:
1.  input low
2.  input high
3.  0V
4.  0V
5.  +30 VDC
6.  output
7.  0V
8.  frame/chassis