sideout wrote:.....I wonder if the Wassel DC pioneers on here have got any clever ideas for a work around? Or is the future AC?....

Has anyone actually tried connecting to a Wassel DC set up with the rev counter feed connected to the DC output from the Wassel unit? maybe there is enough 'ripple' in the DC to trigger it, can't do any harm to try it in any case. If the battery smooths the DC out too much I wonder if inserting a diod into the possitive lead from thr Wassel and attaching the rev counter 'downstream' (isolating the batteryt) would work?
Does the technical specification for the SIP speedo give any info on the AC signal requirements for the rev counter? If it'll take up to 30 odd volts then connecting to the unregulated side of the Wassel unit would work. If not then it might be possible to work out some kind of voltage reduction arrangement.
Any thoughts on either of the above J1MS or Firekpd??