Would anyone happen to have a manual lying around for the Heath IM-2420 512 MHz (oven timebase) counter? 73, Mark WB8JKR Support Amateur Radio, have a Ham for dinner Member ARRL, QCWA, OTC, Society of Cable Telecommunication Engineers WAS, WAC, WTO, DXCC MIXED, DXCC PHONE, GJDXCC, VUCC 2M, 1st place Ohio single op 1988 ARRL SweepStakes Novice 3/71, General 8/72, Advanced 8/78, Extra 8/89