emulatorII-list

On mine, they are not even aluminium electrolytics. each is a pair of tantalums wired in series. I can't tell you if sampling works as at the moment my EII won't even boot.

Kevin

--- In emulatorII-list@yahoogroups.com, "Gil" <gilwe@...> wrote:
>
> I haven't managed to get my Emulator II to sample from the day I got it.
> 
> I see no signal when playing into the input (using another synth, or an electric guitar).
> 
> I decided to investigate this further and found that what seems to be the sampling circuit, has two electrolyte caps, which on the schematics are marked as "alum-electro (nonpolar) 4.7uf" but on the actual board, regular POLAR caps are used. These caps I put myself while recapping the machine when I got it  a few years ago.
> 
> I tend to think that this causes the sampling circuit not to work,
> BUT - a closer look at the board reveals a + sign near each of these two caps, as if the engineers did intend to use regular POLAR caps there...
> 
> I'm afraid to replace them with non-polars so I don't damage the circuit...
> 
> 
> Any advice / info on this ? Will anyone be able to take a look at his E-II voice board and check if these two electrolyte 4.7uf caps are bipolar (there should be a "NP" mark on them, and no polarity marking) ?
> 
> They are right under the power supply at the top-right corner of the left board.
> 
> The diagram is probably page 42 in the manual:
> 
> http://www.synthesizerarchiv.de/circuits/emu/emulator2_circuits/emulator2_circuits.pdf
> 
> Thanks !
>