G'day folks,
I have a HP spectrum analyzer for trade, the HP 8558B.
It's a 1.5GHz instrument in working and fair condition.
I'd like to get astro gears for it.
My preference is a ED refractor (Chinense)
or a no go-to G11 (I'm realistic in regard of the value...

)
or an old SCT on a fork mount

or a pair of good quality worm gear drive.
If you want this and have a more valuable trade,
I can offer cash in a reasonable amount.
This is just a suggestion. I'm open for any other offer,
and am willing to drive a reasonable distance from Adelaide
so the instrument can be checked out.
Regards,

Mick.
Edit 3-1-2009
I also interested for a swap for a :
A good (!) 6"f8 achro or,
Meade Autostar+LXD75 motors,
or a EQ6PRO for the analyzer+cash