I have a HP 117A VLF Comparator with the Antenna and Service Manual. Included are two NIB spare Nuvistors for the Antenna Pre-Amp (13CW4). Shipping could be a problem (Antenna), so prefer a local pickup. I am in Lexington, MA (NW of Boston). Asking $150.
73, Dick, W1KSZ- posted
19 years ago