I would like to use my Vibroplex Brass Racer (The one with the Curtis chip) on my Globe Chief 90A and I was wondering what type of isolation is needed between the Racer and the rig? I don't think the Racer could handle the voltage. The key up voltage across the key is 70 vdc. TIA es 73 Gene, WØQFC Spring Hill, Florida WEB SITE: http://www.w0qfc.com