The Repair of the Input Mixer of the HP 8555A Spectrum Analyser
by Brian W Flynn GM8BJF
This article appeared in the September 2002 UK Microwave Newsletter and others might find it useful if they have an ailing HP8555A plug-in.
It may be found at Brian's web site here
http://myweb.tiscali.co.uk/gm8bjf/text.html