[Test-Equipment] Olders HP Spectrum Analyzers - The YIG?

[Greg Mijal]

Hi:

I recently posted email about the older HP 8551B/851B spectrum analyzers.  The response was informative and helpful.  The consensus is that this is a very robust machine.  I have decided to take a try at getting one of the units going after I run a "drying out" process to the units.
Here's my question.  Someone mentioned that the YIG conversion was good for the machine and I think I found what he was talking about.  Would you please have a look at the pictures and confirm that that is what he was speaking about. It is lower right in the photos. HV tubes removed for safe keeping.
http://home.earthlink.net/~bluebirdtele/yy.jpg
http://home.earthlink.net/~bluebirdtele/yx.jpg
Your thoughts are appreciated. Or should I say I am hanging on every word?

Greg