[Test-Equipment] Old HP RF analyzers - are they worth it?

[Mark Donaldson]

I don't own one of these but a friend did for a while,
he replaced the original mixer with a good quality
double balanced mixer and got a noticable improvment
in internally generated spurs, sounds like a
worthwhile mod.

MD
--- Greg Mijal <bluebirdtele at earthlink.net> wrote:

> Hi:
> 
> I just blew $25 on two HP spectrum analyzers.  Both
> are the old 851B/8551B sytems. I think I may have
> popped something in my back getting them in my car
> today! I also found a Boonton 260A but that's
> another story.
> One set is complete, the other less than that so I
> will call it a parts donor for now.
> I lost a HP 141T due to old age a couple of years
> ago but would like try it again.
> Here's the question. Is it worth the effort? Can I
> do basic transmitter observations up to 500 mhz?  I
> do not need super accuracy. I need a basic idea if I
> have cleansed the simple transmitter or not. A wee
> wobble on the scope doesn't rule it out for me.
> If you have comments or suggestions I would like to
> hear from you. Anything I need to watch out for
> beyond the basics? Any common failure modes? I'm
> also looking for manuals.
> Thanks
> Greg
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