FA: HP Spectrum Analyzer plug-in model 8558B

[kb9olm]

FA on ebay: HP/Agilent plug-in model 8558B. Item number# 7504094021.
The HP/Agilent 8558B is a 100kHz to 1500MHz spectrum analyzer plug-in
for use with the 853A and 180 series displays.
Thanks, vlad