开云体育

Thanks Dave;

I found an Operation Note for the HP 16091A Cavity test fixture. It does not explain how to use it.

There are a couple of vague paragraphs in the HP 4191A manual (page 3-50 in mine) but nothing on how to use this test fixture.

These appear on Ebay for $1500 or more. Who buys or? uses them?

There is more information in the 1980 Jan HP Journal than the 4191A manual, and some pictures of them in use.?

I assume these are the pins to solder/connect to the sample but no explanation on preparing a sample.

This is the cavity. What are the donuts in the round container? Are these dielectric samples?

Why do they have a hole in them? Has anyone seen/have a manual for this HP 16091A Coaxial Test Fixture?

Is it coaxial as in an RF cavity? I don't think so because it is too small for 1 GHz.?

I think it is a coaxial shield for minimum stray capacitance/inductance.

On Sun, Nov 14, 2021 at 9:33 PM Dave McGuire <mcguire@...> wrote:

On 11/14/21 8:57 PM, peter bunge wrote:
> How are connections made to samples with granular surfaces? Any
> suggestions apart from sputtering?
> How about conductive paint (rear defroster repair, Permatex has two
> products)?
> How are samples prepared for an instrument like the HP4191A? Is there a
> document that covers the subject?
> What do the samples look like and what dimensinos? It does not appear to
> be in the 4191A manual.
> Is there anyone? with actual experience making up samples and measuring
> them?
> My interest is in measuring the properties of highly conductive samples
> at different frequencies.

? ?How about colloidal silver?? The kind that's used in electron
microscopy, not the kind that's used by "healing crystals" etc nutjobs.

? ? ? ? ? ? ?-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA