Hi all what is listed here is the NTE610. It needs to be 4pF at 4V or thereabouts. This NTE610 is available from newark.com, the part number is 31C5207, price $1.05. Hope this solves the problem. 73, Ulrich hb9aik - vk6bqd Ulrich N Fierz Telecommunication Engineering Services Zurichbergstrasse 203 CH-8044 Zurich Switzerland <hb9aik at yahoo.com>