Doepfer

Does the A-137 Wave Multiplier also rectify somewhat, via the
"Symmetry" setting, or am I understanding it wrong?

--- In Doepfer_a100@yahoogroups.com, "Tim Stinchcombe" <timothy@...>
wrote:
>
> Hi list,
> 
> I only just discovered all this chat about full-wave rectifying etc., 
> and what the A-136 can/can't do, so I'm arriving to the party a 
> little late I'm afraid!
> 
> Yes, the A-136 can do this, but as Jari pointed out previously, it 
> requires some very careful knob twiddling. Here is what I did:
> 
> 1. Fed a sine wave into the input - the amplitude is deliberately 
> kept below about +/-2V, as otherwise the first stage in the A-136 
> will clip it.
> 2. Inserted patch cords into the 'ext level' sockets: the other ends 
> are not plugged in anywhere else, and simply act to keep the '+L' 
> and '-L' levels from interacting at all.
> 3. Adjusted all three 'A' controls to get the minimum out - this is 
> to get the 'A' gain at the (electrical) centre-spot (care must be 
> taken not to touch this again!).
> 4. Adjusted '+A' and '-A' in opposite directions to get full-wave 
> rectification: half-wave is obtained by setting each of these to 
> zero, in turn.
> 
> If this was going to be a regular occurence, it would probably be a 
> simple matter to modify the module with a few switches to 
> connect/disconnect stuff, and to put gains at precise settings.
> 
> I've posted some scope traces in the 'files' section, folder 'A-136 
> rectification'
> 
> Tim
>