Need small knob that adjusts dial calibration and filter switch knob. FS AA-100 w/o final tubes (7591's) $35 or will part out. Joe Sponsored by the City of Tempe Listserver Submissions: heath at listserv.tempe.gov Listserver Subscription: listserv at listserv.tempe.gov - "subscribe heath 'name' 'call'" Listserver Unsubscribe: listserv at listserv.tempe.gov - -"signoff heath"