user 40373
Well-known member
- Joined
- Nov 22, 2009
- Messages
- 109
Last week I bought a broken Orban 111B. For some reason a previous owner removed the dual input/output attenuation potentiometers . They aren’t jumpered so obviously it doesn’t pass signal.
They are an unusual pot because it has two values...10K and 500K log clockwise.There isn't a readily available modern alternative so I ordered individual pots from Mouser.
Unfortunately I'm not getting any reverberated output. One the left channel, using the "mixed" output I get dry, unaffected signal and the input does turn it up or down, but the output doesn't do anything. If I increase the input, the "limiter" indicator flashes so I believe it's getting that far! Using the balanced, all wet output I get nothing.
On the right channel, again using the "mixed" output I get dry, unaffected signal but it cuts out. However the "limiter" indicator stay solid no matter what so not sure what's going on there. Using the balanced again nothing.
Any thoughts on where to start? I recapped the electrolytic caps.
Here's the schematics: http://www225.pair.com/audio/waltzingbear/Schematics/Orban/111B.htm
They are an unusual pot because it has two values...10K and 500K log clockwise.There isn't a readily available modern alternative so I ordered individual pots from Mouser.
Unfortunately I'm not getting any reverberated output. One the left channel, using the "mixed" output I get dry, unaffected signal and the input does turn it up or down, but the output doesn't do anything. If I increase the input, the "limiter" indicator flashes so I believe it's getting that far! Using the balanced, all wet output I get nothing.
On the right channel, again using the "mixed" output I get dry, unaffected signal but it cuts out. However the "limiter" indicator stay solid no matter what so not sure what's going on there. Using the balanced again nothing.
Any thoughts on where to start? I recapped the electrolytic caps.
Here's the schematics: http://www225.pair.com/audio/waltzingbear/Schematics/Orban/111B.htm