Greetings All, I have an HP 8443A Tracking Generator-Counter in perfect working condition with the cable and manual for sale. This is the last version that employed seven-segment LED readouts vs the earlier ones with Nixie tubes. It is for use with the 141T or the 8552/8553 spectrum analyzers and covers 110KHz to 110MHz. .JPGs available for serious inquiries. Thanks. 73, Marv, W6FR