Thanks for the responses when I asked for source for the PTFE tape used to modify the cal amp downcoverter. Thanks especially to Robert Gerner who sent me a piece of the tape. Now to order a crystal from International. Richard, KR4XN ---- Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA. To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org