I have a Heath Kit assembly manual for a Transistor-Diode Checker, Model IT-27. I don't have the checker. I don't need the manual. If anyone wants it, let me know. If there are no takers in Houston, I'll try the AQRP group and then QRP-L. After that, It goes in the roundfile. Let me know if you can use it and I'll get it to you. N3Ted