Go to Agilent home page, search for 16334A.

I also have a homebrew design that works fine, resolution to as little
as 0.01pF, but haven't had a chance to move it from the breadboard
stage to a more finished implementation. It will be tweezers that
connect to a readout box through a single coaxial cable (RG-174-type).
There can be interchangeable "heads" -- tweezers, spring clips, etc.
If/when I get enough round tuits to finish it up, I'll post/publish
something on it.

Cheers,
Tom

Rex wrote in message . ..
On 23 Mar 2004 23:50:18 -0800, (Tom Bruhns) wrote:

with my capacitance tweezers

That sounds interesting. I have used regular tweezers to slip sm caps
into a fixture I made. This goes pretty fast except when I accidentally
twang a part into some far and unknown location.

Did you make these youself? Can you give a quick description.

I can think how I could make low capacitance tweezers, but not how to
flexibly connect them to a capacitance meter and get consistant
readings.

In

That sounds interesting. I have used regular tweezers to slip sm caps
into a fixture I made. This goes pretty fast except when I accidentally
twang a part into some far and unknown location.

Did you make these youself? Can you give a quick description.

I can think how I could make low capacitance tweezers, but not how to
flexibly connect them to a capacitance meter and get consistant
readings.
Wayne Kerr used to make a VHF admittance bridge which serves well for
measuring chips, and they can be bought for less than £100 (813? bridge)
in UK
leaded low value ceramic and silvered mica have their Tc and loss
modified by the effect of the encapsulation material.
It therefore follows that chips npo chip will be better.
--
ddwyer

I read in sci.electronics.design that ddwyer
wrote (in ) about 'Extracting the
5th Harmonic', on Sat, 27 Mar 2004:

Wayne Kerr used to make a VHF admittance bridge which serves well for
measuring chips, and they can be bought for less than £100 (813? bridge)

You might well be able to extend its frequency range downwards, too.
IIRC, it needs some very small 1 uF capacitors, which simply weren't
available when it was manufactured.

There is an associated transistor test set which is a walking disaster.
--
Regards, John Woodgate, OOO - Own Opinions Only.
The good news is that nothing is compulsory.
The bad news is that everything is prohibited.
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk

I read in sci.electronics.design that ddwyer
wrote (in ) about 'Extracting the
5th Harmonic', on Sat, 27 Mar 2004:

Wayne Kerr used to make a VHF admittance bridge which serves well for
measuring chips, and they can be bought for less than £100 (813? bridge)

You might well be able to extend its frequency range downwards, too.
IIRC, it needs some very small 1 uF capacitors, which simply weren't
available when it was manufactured.

There is an associated transistor test set which is a walking disaster.
--
Regards, John Woodgate, OOO - Own Opinions Only.
The good news is that nothing is compulsory.
The bad news is that everything is prohibited.
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk

In

That sounds interesting. I have used regular tweezers to slip sm caps
into a fixture I made. This goes pretty fast except when I accidentally
twang a part into some far and unknown location.

Did you make these youself? Can you give a quick description.

I can think how I could make low capacitance tweezers, but not how to
flexibly connect them to a capacitance meter and get consistant
readings.
Wayne Kerr used to make a VHF admittance bridge which serves well for
measuring chips, and they can be bought for less than £100 (813? bridge)
in UK
leaded low value ceramic and silvered mica have their Tc and loss
modified by the effect of the encapsulation material.
It therefore follows that chips npo chip will be better.
--
ddwyer