At 07:32 PM 12/22/00 -0800, you wrote: >Multipliers seem hard to come by these days. Use a beam-deflection tube!! It can be used as a ring modulator. Antique Electronic Supply is having a sale on 6AR8 beam deflection tubes. $1.70 each.... this sale is not on their website. call them at 480-820-5411. Eric Barbour METASONIX