I have several Polar Relays similar to the ones shown on Brooke Clarkes excellent page: http://www.prc68.com/I/Telegraph.shtml#255A The ones I have here are type 119A. If you would like to have a Polar Relay to tinker with, they are $7.50 each plus postage. Shipping weight 2 lbs. Steve Hilsz jydsk at tds.net