General > Buy/Sell/Wanted

HP 8901B Mod Analyzer and HP1200A OSC

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edavid:

--- Quote from: metrologist on January 29, 2025, 07:00:57 am ---
--- Quote from: edavid on January 28, 2025, 08:27:51 pm ---
--- Quote from: metrologist on January 25, 2025, 04:32:49 pm ---Working HP8901B cost quite a bit more (over $1000 typ.).

--- End quote ---

What makes you say that?

https://www.ebay.com/itm/375755563680

--- End quote ---

That one sold quick when the price dropped 50%. I didn't say that none ever come up for sale under $1k.

I'd say the average of every working unit is about a typical price. There are 7 working units on ebay that range from $3k to $1k, and the next two are $500 and $400 (I'm including shipping in those), at this time.

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This made me curious enough to fire up eBay's price research tool, which goes farther back than the regular search (but I think you have to be logged in to use it):

https://www.ebay.com/sh/research?marketplace=EBAY-US&keywords=hp+8901b+-manual+-board+-sensor&dayRange=1095&endDate=1738166308156&startDate=1643558308156&categoryId=0&offset=0&limit=50&sorting=-avgsalesprice&tabName=SOLD&tz=America%2FDenver

The selling prices are actually higher than I expected, but I'm kind of an 8901 hater :)
Have you gotten any nibbles on craigslist?


--- Quote ---maybe this stuff sits there for years

--- End quote ---

That is certainly true of any 8901B priced >= $1K.

metrologist:
LoL, one guy asked how to use it.

Yes, those higher priced equipment will sit, and some might sell particularly if there is a valid cal... I was thinking all brands of replacement assemblies folks have parted out. Lots of Tek stuff on there, for example.

What's wrong with the 8901 series? We used an 8901A in our phase noise test station for years. Was a solid piece of equipment.

Of course, today there is far better equipment with color touch screen, multiple traces like time/frequency domain of both audio and RF spectrum, and complete summary of all measurement parameters such as peak/RMS depth/deviation, THD, SINAD, etc... all available at a glance. Not to mention far greater accuracy, resolution, and measurement speed; battery powered and small enough to fit into your car's glovebox (maybe), with a price to match.  8)

edavid:

--- Quote from: metrologist on January 30, 2025, 04:53:41 pm ---What's wrong with the 8901 series? We used an 8901A in our phase noise test station for years. Was a solid piece of equipment.

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Size, weight, and noise?

metrologist:

--- Quote from: edavid on January 30, 2025, 05:29:56 pm ---Size, weight, and noise?

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Well, that would apply to a lot of old gear, and noise is a common complaint with new gear too.

I think the Tek 496 was louder and weighed 44 lb., coincidentally the same as the 8901B, but the 8901 does have a larger footprint. Mine sits on a shelf above the bench and I have no desire to move it - especially since the top is big and flat and takes other equipment nicely.

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