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Cleaning N-tyoe cal kit

 

Not strictly Agilent/HP, but I recently bought a 2nd hand N-Type cal kit for the 3 HP VNA's I have.?
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I did originally want a new kit from Kirkby Microwave, but after 3 or 4 emails over the course of a few weeks with no response I gave up.?
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So I have this 2nd kit, the pin depth checks out ok on it. Problem is the foam has deteriorated in the case, and some of it has got into the connectors. I've tried IPA with a swab and got the worst of it out, but some stubbornly remains. Any suggestions to dissolve the black sticky residue? Or otherwise clean these connectors.
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Problem number 2 is creating a definitions file for the 8519C, 8753C? and 8571A although 85054A?
 

Ultrasonic bath with a suitable cleaner?

Enviado do meu Tele-Movel.
Desculpe a brevidade.

Em sáb., 22 de mar. de 2025 06:52, vee-dub565 via <Vee-dub565=[email protected]> escreveu:

Not strictly Agilent/HP, but I recently bought a 2nd hand N-Type cal kit for the 3 HP VNA's I have.?
?
I did originally want a new kit from Kirkby Microwave, but after 3 or 4 emails over the course of a few weeks with no response I gave up.?
?
So I have this 2nd kit, the pin depth checks out ok on it. Problem is the foam has deteriorated in the case, and some of it has got into the connectors. I've tried IPA with a swab and got the worst of it out, but some stubbornly remains. Any suggestions to dissolve the black sticky residue? Or otherwise clean these connectors.
?
Problem number 2 is creating a definitions file for the 8519C, 8753C? and 8571A although 85054A?
 

Possibly, although I'd be concerned about immersing it in the cleaning solution.?
 

Hello,

I have the same issue with my calibration kits, the foam got very sticky
and the majority of the connectors are affected. Some had a dust cap and
only the exterior was affected and it cleaned nicely with IPA.

I was also thinking to put them in the small ultrasonic cleaner that I
have but from what I saw the labels will probably wear off. Some text on
the labels is already not visible when I cleaned the outside with IPA 99%.

Regards,
Razvan

On 22/03/2025 14:57, vee-dub565 via groups.io wrote:
Possibly, although I'd be concerned about immersing it in the cleaning
solution.
_._,_._,_
 

Its horrible stuff isn't it.
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I've actually got some Electrolube Contact Cleaning Strips which I bought for cleaning relay contacts. And with a bit of patience and some IPA they seem to be doing the job. They are possibly slightly abrasive, so I'm not going to go too mad with them.??
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?
?
 

Been using 99% isopropyl (IPA, not from the local brew pub).

A 3.5mm Maury sliding load/termination had enough of that same foam residue that it would not slide across it's range. The supplies below (aerosol IPA and foam-tip swabs, along with a very fine tipped tweezers to pluck out anything that could be plucked) together all got the sliding load back to normal motion.

MG Chemicals 824-450G as an aerosol (not push-pump) packaging I've found is really handy for detail electronics cleaning (just IPA, but in a propellant spray can.)

Foam-tip swabs (like those used for cleaning fiber-optic connectors during field installation, cheap by the pack of 100) with either rounded (2.5mm) or pointy (1.25mm) tips are also helpful to reach in around the male pin and internal shielding. The female pin end I think only can be cleaned by IPA, that's where delivering via spray is handy.

Dave
 

After lots of trials with several solvents over the years I've found the best solvent for decayed PU foam is 99% methanol.
 

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If you use methanol, please be extremely careful. Wear gloves, don't inhale fumes, etc. Methanol poisoning is no joke. Read up on it prior to use.

--Tom
-- 
Prof. Thomas H. Lee
Allen Ctr., Rm. 205
420 Via Palou Mall
Stanford University
Stanford, CA 94305-4070


On 3/22/2025 2:23 PM, Robert G8RPI via groups.io wrote:

After lots of trials with several solvents over the years I've found the best solvent for decayed PU foam is 99% methanol.
 

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If you manage to separate the metallic parts form dielectrics , it is possible on older connectors. I recommend a solution of boiling water and sodium bicarbonate to clean the parts the process can take a couple of hours. Sodium bicarbonate is a known antiacid and its easy to get . It reverts the corrosion and is the best to save gold plated surfaces. Of coarse you can rework the surfaces with electroplating.?
Ing. Patricio A. Greco
Taller Aeronáutico de Reparación 1B-349
Organización de Mantenimiento Aeronáutico de la Defensa OMAD-001
Gral. Martín Rodríguez 2159
San Miguel (1663)
Buenos Aires
T:?+5411-4455-2557
F:?+5411-4032-0072

On 22 Mar 2025, at 22:23, Robert G8RPI via groups.io <robert8rpi@...> wrote:

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After lots of trials with several solvents over the years I've found the best solvent for decayed PU foam is 99% methanol.

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