I'm looking for an old (68-76)Heath AC VTVM which measures low levels (audio frequency range)....I believe it's a IM-38. 73s Kees K5BCQ Listserver Subscription:listserv at listserv.tempe.gov - "subscribe heath 'name' 'call'" Listserver Submissions: heath at listserv.tempe.gov Listserver Unsubscribe: listserv at listserv.tempe.gov - -"signoff heath"