[sdiy] on the search for some MXR Digital Delay memory chips

[Travis Shire]

> Thanks to Paul Perry for the tip-off,  it seems like some Arcade Game
> suppliers have these chips. So I'm going to try and round them up
> soon.  :)
>
>
> +odd
> --

I'm with Christian on this. That old triple supply ram runs real warm, is is
*real* fussy with supply voltages and is getting difficult to track down.
How many are in each unit? I'd think a couple 4164s would replace the whole
lot and only require a +5v supply.