Manuals: Original for Precision Model 10-60 tube tester. $15 Original for Knight-Kit Model KG-652 RF sweep generator. $10 Test Equipement Knight-Kit Model KG-686 RF Generator 160Khz-54 Mhz with orig manuals and schematics. $45 Heath-Kit Model 18-2A Impedance Bridge with org manuals. $25 plus shipping on items Regards, Rock