Tks to all who have replied. I found some caps on ebay which appear suitable: http://cgi.ebay.com/470-pF-16-KV-Doorknob-Capacitors-Brand-New-Lot-of-5_W0QQitemZ200411424661QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item2ea973a795 Comments, please? Tks & brgds, Dave Windisch, W8FGX