Re: [Elecraft] deoxit

[Eric Swartz - WA6HHQ, Elecraft]

We are at 14 posts on Deoxit(tm) and this topic has been pretty much beaten to 
death ;-)


Let's close the thread at this time in the interest of reducing email overload 
for others.


73,

Eric
Mooderator
/elecraft.com/

On 7/19/2016 8:12 PM, Ron D'Eau Claire wrote:

Quite so. I used deoxit in a small 2 oz bottle with a thin syringe-like tube
applicator that puts a very tiny amount on the contact. That's all it takes.


73 Ron AC7AC



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Re: [Elecraft] deoxit

[Ron D'Eau Claire]

Quite so. I used deoxit in a small 2 oz bottle with a thin syringe-like tube
applicator that puts a very tiny amount on the contact. That's all it takes.


73 Ron AC7AC

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ian
White
Sent: Monday, July 18, 2016 11:48 PM
To: 'Rich Assarabowski'; elecraft@mailman.qth.net
Subject: Re: [Elecraft] deoxit

Where available, a clear gel product called Contralube 770 also works well
(www.contralube.com ).

Back when Deoxit was more difficult to buy in Europe, I used Contralube
770 to cure intermittent contacts on all of the multi-way front panel
connectors, which have given no further trouble for 7 years. 

Like all of these products, a little goes a very long way. To apply a small,
controlled amount onto inline multi-way connector pins, first apply a thin
layer onto the edge of a piece of card, and use that to wipe the lubricant
onto the pins. 

**USE STRONG ANTI-STATIC PRECAUTIONS**   These internal interconnections
are completely unprotected against static charges! 


73 from Ian GM3SEK


>-Original Message-
>From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of 
>Rich Assarabowski
>Sent: 19 July 2016 04:50
>To: elecraft@mailman.qth.net
>Subject: Re: [Elecraft] deoxit
>
>What's the consensus on the best stuff to use on all contacts and
>connections during assembly of a new K3?   Caig DeoxIT Gold G-series
>(formerly ProGold)?   Stabilant 22A?   Something else?
>
>--- Rich K1CC
>
>>I cleaned the connector and I put few drops of Stabilant 22A and the
>problem
>>seems resolved. My friend VE2OLM have a PCB design and assembly shop.
>He
>>need sometime to rework some boards and he need use that stuff to
>correct
>>the problem. Also use by NATO
>>
>>http://stabilant.com/appnt01.php
>
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>gm3...@ifwtech.co.uk

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Re: [Elecraft] deoxit

[Ron D'Eau Claire]

I have only used deoxit because the little bottle I bought a decade ago is
not nearly exhausted. It works great and contacts cleaned with it have
continued to work for years afterward, even aboard ships where they are
exposed to salty air (but not salt water). 

However other formulations or brands may work better. 

73, Ron AC7AC

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Rich
Assarabowski
Sent: Monday, July 18, 2016 8:50 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] deoxit

What's the consensus on the best stuff to use on all contacts and
connections during assembly of a new K3?   Caig DeoxIT Gold G-series
(formerly ProGold)?   Stabilant 22A?   Something else?

--- Rich K1CC

>I cleaned the connector and I put few drops of Stabilant 22A and the
problem
>seems resolved. My friend VE2OLM have a PCB design and assembly shop. 
>He need sometime to rework some boards and he need use that stuff to 
>correct the problem. Also use by NATO
>
>http://stabilant.com/appnt01.php

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Re: [Elecraft] deoxit

[Richard Fjeld]

I have forgotten so much over the years, but I am left with the 
understanding that gold against gold does not suffer metal migration.

Now dirt is another ballgame.  And so is condensation.

As the name 'DeoxIT' suggests oxidation to me, I answered the way I 
did.  I don't think gold oxidizes.


Dick, n0ce


On 7/19/2016 3:13 PM, Jerry Moore wrote:

The contact doesn't exist in a vacuum and is thus potentially exposed to
whatever exists in the air at that location. Over time, regardless, the
connections may require maintenance.
Example: I flew as Aircrew for the Navy. Most of our gear was sealed. Even
being sealed a re-seat of a circuit card or cleaning of the edge fingers
often brought faulted gear back into functional status.
Perhaps if we create d a vacuum around our gear it wouldn't be as much of an
issue?

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
Richard Fjeld
Sent: Tuesday, July 19, 2016 3:46 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] deoxit

It is my opinion that with gold plated contacts, nothing should be needed.

It is also my opinion **never** to touch gold plated contacts.

(I keep some Caig DeoxIT on hand.)

Dick, n0ce


On 7/18/2016 10:50 PM, Rich Assarabowski wrote:

What's the consensus on the best stuff to use on all contacts and
connections during assembly of a new K3?   Caig DeoxIT Gold G-series
(formerly ProGold)?   Stabilant 22A?   Something else?

--- Rich K1CC





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Re: [Elecraft] deoxit

[Jerry Moore]

The contact doesn't exist in a vacuum and is thus potentially exposed to
whatever exists in the air at that location. Over time, regardless, the
connections may require maintenance. 
Example: I flew as Aircrew for the Navy. Most of our gear was sealed. Even
being sealed a re-seat of a circuit card or cleaning of the edge fingers
often brought faulted gear back into functional status. 
Perhaps if we create d a vacuum around our gear it wouldn't be as much of an
issue?

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
Richard Fjeld
Sent: Tuesday, July 19, 2016 3:46 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] deoxit

It is my opinion that with gold plated contacts, nothing should be needed.

It is also my opinion **never** to touch gold plated contacts.

(I keep some Caig DeoxIT on hand.)

Dick, n0ce


On 7/18/2016 10:50 PM, Rich Assarabowski wrote:
> What's the consensus on the best stuff to use on all contacts and
> connections during assembly of a new K3?   Caig DeoxIT Gold G-series
> (formerly ProGold)?   Stabilant 22A?   Something else?
>
> --- Rich K1CC
>
>

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Re: [Elecraft] deoxit

[Richard Fjeld]

It is my opinion that with gold plated contacts, nothing should be needed.

It is also my opinion **never** to touch gold plated contacts.

(I keep some Caig DeoxIT on hand.)

Dick, n0ce


On 7/18/2016 10:50 PM, Rich Assarabowski wrote:

What's the consensus on the best stuff to use on all contacts and
connections during assembly of a new K3?   Caig DeoxIT Gold G-series
(formerly ProGold)?   Stabilant 22A?   Something else?

--- Rich K1CC




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Re: [Elecraft] deoxit

[Ian White]

Where available, a clear gel product called Contralube 770 also works
well (www.contralube.com ).

Back when Deoxit was more difficult to buy in Europe, I used Contralube
770 to cure intermittent contacts on all of the multi-way front panel
connectors, which have given no further trouble for 7 years. 

Like all of these products, a little goes a very long way. To apply a
small, controlled amount onto inline multi-way connector pins, first
apply a thin layer onto the edge of a piece of card, and use that to
wipe the lubricant onto the pins. 

**USE STRONG ANTI-STATIC PRECAUTIONS**   These internal interconnections
are completely unprotected against static charges! 


73 from Ian GM3SEK


>-Original Message-
>From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
>Rich Assarabowski
>Sent: 19 July 2016 04:50
>To: elecraft@mailman.qth.net
>Subject: Re: [Elecraft] deoxit
>
>What's the consensus on the best stuff to use on all contacts and
>connections during assembly of a new K3?   Caig DeoxIT Gold G-series
>(formerly ProGold)?   Stabilant 22A?   Something else?
>
>--- Rich K1CC
>
>>I cleaned the connector and I put few drops of Stabilant 22A and the
>problem
>>seems resolved. My friend VE2OLM have a PCB design and assembly shop.
>He
>>need sometime to rework some boards and he need use that stuff to
>correct
>>the problem. Also use by NATO
>>
>>http://stabilant.com/appnt01.php
>
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Re: [Elecraft] deoxit

[Rich Assarabowski]

What's the consensus on the best stuff to use on all contacts and
connections during assembly of a new K3?   Caig DeoxIT Gold G-series
(formerly ProGold)?   Stabilant 22A?   Something else?

--- Rich K1CC

>I cleaned the connector and I put few drops of Stabilant 22A and the
problem
>seems resolved. My friend VE2OLM have a PCB design and assembly shop. He
>need sometime to rework some boards and he need use that stuff to correct
>the problem. Also use by NATO
>
>http://stabilant.com/appnt01.php

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Re: [Elecraft] deoxit

[VE2EBK]

Hi Chris

 

I cleaned the connector and I put few drops of Stabilant 22A and the problem
seems resolved. My friend VE2OLM have a PCB design and assembly shop. He
need sometime to rework some boards and he need use that stuff to correct
the problem. Also use by NATO

 

http://stabilant.com/appnt01.php

 

GL

 

Dany VE2EBK

 

 

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Re: [Elecraft] deoxit

[GRANT YOUNGMAN]

They do.  And it’s better because it’s also a lube.  I typically give pots a 
bit of of Deoxit, followed by the Fader Lube.  

It’s roughly the same as wearing a belt AND suspenders :-)

Grant NQ5T


> On Jul 18, 2016, at 1:54 PM, Richard Fjeld  wrote:
> 
> I think they also make a product for potentiometers called 'Fader lube' or 
> something similar.
> 
> Dick, n0ce
> 
> 
> On 7/17/2016 9:24 PM, Ron D'Eau Claire wrote:
>> I use the canned stuff on noisy potentiometers where I give them a shot
>> through one of the openings.
>> 
>> On any contacts, I have a 2 oz bottle with a needle applicator that puts
>> exactly what I want where I want it.
>> 
>> Servicing ancient radars and other shipboard gear with relays and many
>> connectors, that tiny 2 oz bottle has lasted me more than a decade!
>> 
>> 73, Ron AC7AC
>> 

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Re: [Elecraft] deoxit

[Richard Fjeld]

I think they also make a product for potentiometers called 'Fader lube' 
or something similar.


Dick, n0ce


On 7/17/2016 9:24 PM, Ron D'Eau Claire wrote:

I use the canned stuff on noisy potentiometers where I give them a shot
through one of the openings.

On any contacts, I have a 2 oz bottle with a needle applicator that puts
exactly what I want where I want it.

Servicing ancient radars and other shipboard gear with relays and many
connectors, that tiny 2 oz bottle has lasted me more than a decade!

73, Ron AC7AC



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Re: [Elecraft] deoxit

[Richard Fjeld]

I think they also make a product for potentiometers called 'Fader lube' 
or something similar.


Dick, n0ce


On 7/17/2016 9:24 PM, Ron D'Eau Claire wrote:

I use the canned stuff on noisy potentiometers where I give them a shot
through one of the openings.

On any contacts, I have a 2 oz bottle with a needle applicator that puts
exactly what I want where I want it.

Servicing ancient radars and other shipboard gear with relays and many
connectors, that tiny 2 oz bottle has lasted me more than a decade!

73, Ron AC7AC

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Reuben
Popp
Sent: Sunday, July 17, 2016 6:33 PM
To: Chris Meagher; Elecraft Reflector Reflector
Subject: Re: [Elecraft] deoxit

Hey Chris,

On my older hollowstate stuff, I usually spray a quantity into a small cup
and then use a q-tip to apply deoxit to areas in a controlled manner.  That
might not make as big a difference on newer equipment, but I was always told
it was a good idea around phenolic tube sockets.

GL and 73
Reuben

On Sun, Jul 17, 2016 at 8:28 PM, Chris Meagher <acdmeag...@gmail.com> wrote:


Hi
When the can arrives, I plan to deoxit front panel connections on an
early
K3
which has tinned connectors.
This is to try to fix erratic VFO behaviour while tuning.
Any hints on how to do this effectively? thanks

Chris
VK2ACD
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--
In this dedication of a Nation we humbly ask the blessing of God.
May He protect each and every one of us. May He guide me in the days to come.
(From Franklin Delano Rosevelt's inaugural address 3/4/33)

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Re: [Elecraft] deoxit

[Ron D'Eau Claire]

I use the canned stuff on noisy potentiometers where I give them a shot
through one of the openings. 

On any contacts, I have a 2 oz bottle with a needle applicator that puts
exactly what I want where I want it. 

Servicing ancient radars and other shipboard gear with relays and many
connectors, that tiny 2 oz bottle has lasted me more than a decade! 

73, Ron AC7AC

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Reuben
Popp
Sent: Sunday, July 17, 2016 6:33 PM
To: Chris Meagher; Elecraft Reflector Reflector
Subject: Re: [Elecraft] deoxit

Hey Chris,

On my older hollowstate stuff, I usually spray a quantity into a small cup
and then use a q-tip to apply deoxit to areas in a controlled manner.  That
might not make as big a difference on newer equipment, but I was always told
it was a good idea around phenolic tube sockets.

GL and 73
Reuben

On Sun, Jul 17, 2016 at 8:28 PM, Chris Meagher <acdmeag...@gmail.com> wrote:

> Hi
> When the can arrives, I plan to deoxit front panel connections on an 
> early
> K3
> which has tinned connectors.
> This is to try to fix erratic VFO behaviour while tuning.
> Any hints on how to do this effectively? thanks
>
> Chris
> VK2ACD
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>
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Re: [Elecraft] deoxit

[Don Wilhelm]

Chris,

Get the gold pin connectors from Elecraft and install them.  That is a 
better solution than DeOxit on the tin-plated connectors.


73,
Don W3FPR

On 7/17/2016 9:28 PM, Chris Meagher wrote:

Hi
When the can arrives, I plan to deoxit front panel connections on an early
K3
which has tinned connectors.
This is to try to fix erratic VFO behaviour while tuning.
Any hints on how to do this effectively? thanks




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Re: [Elecraft] deoxit

[Reuben Popp]

Hey Chris,

On my older hollowstate stuff, I usually spray a quantity into a small cup
and then use a q-tip to apply deoxit to areas in a controlled manner.  That
might not make as big a difference on newer equipment, but I was always
told it was a good idea around phenolic tube sockets.

GL and 73
Reuben

On Sun, Jul 17, 2016 at 8:28 PM, Chris Meagher  wrote:

> Hi
> When the can arrives, I plan to deoxit front panel connections on an early
> K3
> which has tinned connectors.
> This is to try to fix erratic VFO behaviour while tuning.
> Any hints on how to do this effectively? thanks
>
> Chris
> VK2ACD
> __
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Re: [Elecraft] DeoxIT Gold

[Dan Sherwood]

Radio Shack had it.  $17 incl tax for very small vials both kinds - ouch.
When I put my P3 together I'll spritz a bit on a gauze pad and wipe down
those grounding pads.  Worth the cost not to have trouble later.

If I'd seen this post earlier I would have used a bit of the gold stuff on
the contact pins in the K3 build.  No problems now but perhaps less problems
later.  I noticed light insertion force on all the board connectors,
especially the banana plug from the SO-239 antenna connectors through the
KAT3 board.  Hopefully no problems in the future, works great now.  RF is
hard on any point-to-point connectors.  Replaced many a tube socket in amps
on account if it, when things start getting loose.

73,

Dan
WA6PZK



On 9/27/11 7:07 PM, Steve Kercel aa4a...@gmail.com wrote:

 Use the Deoxit, but not the gold, to clean up old pots. It does an
 amazing job. I've used it on carbon pots and it has not produced any
 problems for me.
 
 73,
 
 Steve
 AA4AK
 
 
 On 9/27/2011 9:45 PM, Dan Sherwood wrote:
 Is this stuff good for quieting scratchy potentiometers?  I gather from
 reading these posts it is good for contacts and antennas.  Not sure if it's
 safe for carbon pots.  I'm cleaning up my trusty old TS-940 for resale.  New
 K3 took its place.
 
 73,
 
 Dan  WA6PZK
 
 -- Forwarded Message
 From: Paul W. Van Dykecross...@kconline.com
 Date: Tue, 27 Sep 2011 12:22:14 -0400
 To:elecraft@mailman.qth.net
 Subject: [Elecraft] DeoxIT  Gold
 
 How to protect your antenna -  after using DeoxITR D-Series (it is more than
 a contact cleaner, it chemically Improves connections
 (without harm to metals and plastics), I put on  DeoxITR Shield S-Series
 (formerly PreservIT) as it is designed for harsh environments.
 On each DXpedition we take to the Caribbean, these two products are used
 quite extensively as the salt water - etc. tears up the antennas and
 connectors.
 We've seen a definite reduction on the trips in corrosion when we use this.
 No I don't have stock in the company, just a good love not having my
 antennas destroyed by a salt environment.
 
 73's
 Paul Van Dyke - KB9AVO, VP2MVO , and a whole lot of other calls.
 
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Re: [Elecraft] DeoxIT Gold

[Mike Fatchett W0MU]

Do the big box stores carry these products?  I see they have a number of 
different way to apply the product.

Mike W0MU

J6/W0MU November 21 - December 1 2011 CQ WW DX CW
W0MU-1 CC Cluster w0mu.net


On 9/27/2011 10:22 AM, Paul W. Van Dyke wrote:
 DeoxITR D-Series
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Re: [Elecraft] DeoxIT Gold

[Steve Kercel]

Radio Shack carries it.

Steve AA4AK

On 9/27/2011 12:48 PM, Mike Fatchett W0MU wrote:
 Do the big box stores carry these products?  I see they have a number of
 different way to apply the product.

 Mike W0MU

 J6/W0MU November 21 - December 1 2011 CQ WW DX CW
 W0MU-1 CC Cluster w0mu.net


 On 9/27/2011 10:22 AM, Paul W. Van Dyke wrote:
 DeoxITR D-Series
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Re: [Elecraft] DeoxIT Gold

[Steve Kercel]

Use the Deoxit, but not the gold, to clean up old pots. It does an 
amazing job. I've used it on carbon pots and it has not produced any 
problems for me.

73,

Steve
AA4AK


On 9/27/2011 9:45 PM, Dan Sherwood wrote:
 Is this stuff good for quieting scratchy potentiometers?  I gather from
 reading these posts it is good for contacts and antennas.  Not sure if it's
 safe for carbon pots.  I'm cleaning up my trusty old TS-940 for resale.  New
 K3 took its place.

 73,

 Dan  WA6PZK

 -- Forwarded Message
 From: Paul W. Van Dykecross...@kconline.com
 Date: Tue, 27 Sep 2011 12:22:14 -0400
 To:elecraft@mailman.qth.net
 Subject: [Elecraft] DeoxIT  Gold

 How to protect your antenna -  after using DeoxITR D-Series (it is more than
 a contact cleaner, it chemically Improves connections
 (without harm to metals and plastics), I put on  DeoxITR Shield S-Series
 (formerly PreservIT) as it is designed for harsh environments.
 On each DXpedition we take to the Caribbean, these two products are used
 quite extensively as the salt water - etc. tears up the antennas and
 connectors.
 We've seen a definite reduction on the trips in corrosion when we use this.
 No I don't have stock in the company, just a good love not having my
 antennas destroyed by a salt environment.

 73's
 Paul Van Dyke - KB9AVO, VP2MVO , and a whole lot of other calls.

 __
 Elecraft mailing list
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 Post: mailto:Elecraft@mailman.qth.net

 This list hosted by: http://www.qsl.net
 Please help support this email list: http://www.qsl.net/donate.html

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Re: [Elecraft] Deoxit contact cleaner for the frugal

[Bill W4ZV]

GW0ETF wrote:
 
 I've been using Deoxit to nail the problem of less than perfect
 connections between the front panel and motherboard and the associated
 power-up error messages on my early K3.
 

Stewart I'm just curious to know (if you've been using this long enough to
know) if one application solved the problem or are repeats necessary over
time?

73,  Bill


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Re: [Elecraft] Deoxit contact cleaner for the frugal

[GW0ETF]

Bill,

I started with Deoxit 5 months ago. Until then I was used to removing the
front panel every few months and cleaning the contacts with alcohol to stop
the recurring error messages. No error messages since then though have had
the odd loss of pll lock while tuning which may or may not be poor contact
related. It's the old conundrum of proving a negative but so far so good.

I originally bought Deoxit Gold which I didn't realise was a 'contact
conditioner' rather than a cleaner and that is what I used back in May. I
was about to fit the DVR so decided to buy the standard Deoxit (cleaner) and
do the cleaning/conditioning as per instruction while I had the radio apart.
It's recommended to do a clean with Deoxit and then treat with Deoxit Gold
which it says will prevent the contacts losing condition. Just put it all
back together now so will wait to see if I'm problem free. Deoxit certainly
has a good press.

73,

Stewart, GW0ETF




Bill W4ZV wrote:
 
 
 GW0ETF wrote:
 
 I've been using Deoxit to nail the problem of less than perfect
 connections between the front panel and motherboard and the associated
 power-up error messages on my early K3.
 
 
 Stewart I'm just curious to know (if you've been using this long enough to
 know) if one application solved the problem or are repeats necessary over
 time?
 
 73,  Bill
 


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http://elecraft.365791.n2.nabble.com/Deoxit-contact-cleaner-for-the-frugal-tp6831394p6831695.html
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RE: [Elecraft] DeoxIt and/or ProGold useage

[Ron D'Eau Claire]

Good question Ruchan and I, too, was watching for answers.

I understand some fabricators do use it as a preventative, but I don't
know why: are they using a substandard connector material that needs the
help or is there some other reason? 

I did not use DeOxit on my K3 or any other rig. I haven't used as a
preventative in the thousands of electronic devices I've serviced over the
years including a great many in very nasty environments (salt water on large
ships, etc.). 

One thing anyone who still uses a mechanical CW key has learned is that
modern logic, using the tiniest of signaling currents, demands
low-resistance contacts to work reliably. That's why I do use DeOxit on the
brass contacts of my Bug. Otherwise, the rig doesn't reliably recognize the
contact closure with even a small buildup of oxidation on the contacts. 

In theory, properly-mated electrical connectors exclude air, and so oxygen,
from the mating surfaces: they pins and sockets are in intimate contact
forming an air-tight shield over at least a significant part of their
surfaces for as long as they are in that position. They have essentially as
good a contact as if the connectors were soldered. 

That's exactly what the contacts on my Bug do *not* have. They spend most of
the time exposed to oxidizing air. Mated connectors do not. Also, the Bug
contacts bump only gently. There's no significant wiping action to remove
oxidation from them. Connectors literally scrape the contact surfaces clean
when they are assembled. 

So I keep my DeOxit handy for my manual keys and other contacts that manage
to acquire a layer of oxidation that impairs their action, and I leave it
out of new equipment.

Ron AC7AC



-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Ruchan Ozatay
Sent: Monday, November 19, 2007 11:50 AM
To: Elecraft List
Subject: Fw: [Elecraft] DeoxIt and/or ProGold useage


Second Sending!!
Any answer?
Ruchan - TA2AH


- Original Message - 
From: Ruchan Ozatay [EMAIL PROTECTED]
To: Elecraft List elecraft@mailman.qth.net
Sent: Sunday, November 11, 2007 5:20 PM
Subject: [Elecraft] DeoxIt and/or ProGold useage


Hi,

I would like to know if it is really necessary to use DeoxIt or ProGold 
product during the K3 (or any Elecraft products) assembling procedure or 
not?

Any answer from Elecraft crew would be apreciated.

73, Ruchan (TA2AH) ___
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-- 
No virus found in this incoming message.
Checked by AVG Free Edition.
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15:47


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Re: [Elecraft] DeoxIt and/or ProGold useage

[Mike B]

Since I was one of those who brought up the DeoxIT / ProGold usage, I'd like to
post the following report I received from another list member.  I hope he
doesn't mind, as he'll remain nameless, and I've removed a thing or two from the
report which might identify his major aerospace company.  I found the report
rather illuminating.

To save you from Googling, I believe cots CCA to simply be commercial
off-the-shelf circuit card assembly, i.e not a custom designed card for the
application.  VME/VXI buss refers to (I think) a series of common-sized cards,
or boards, used in a variety of equipment.

Investigation into the MCG lockup condition identified the cause to be a high
contact resistance from fretting corrosion.  The corrosion is a result of the
flash (~4 micro inches) gold plating on the DIN connectors not being greater
than 30 micro inches.  Regardless on the cots DIN connectors, Fretting corrosion
is corrosion that can occur on the load bearing contact surface between mating
material when gold plating has been worn through.  One of the contact failure
modes of electrical contacts is fretting corrosion.  The corrosion results in
unacceptable increases of contact resistance in mated connectors.  Fretting
corrosion occurs in separable contacts, when the contacting surfaces are
submitted to small amplitude movement (micro-motion) relative to each other.
This can be caused by vibration, shock, or thermal expansion.  One of the
symptoms for fretting can be identified where reseating of CCA’s in the system
results in clearing the failure mode.  Examination of the connector mating
surface under a scope will reveal a black residue (non-conductive oxide) on the
contacts.

snip picture of gold pins with black residue

This corrosion results in a high resistance contact area thus causing a failure
in the system.  The reseating of the CCA’s results in a scrubbing action that
removes a layer of the oxide where contact is made and the process starts again.

  One method used to inhibiting fretting corrosion is the use of lubricants.
This was recommended by our components engineer snip.  The lubricant reduces
friction, wear, and to some extent shields the surface from the air. The oxide
formation can be decreased by limiting available oxy­gen.  The lubricant/cleaner
we chose is from Miller-Stephensen, part number MS-383H with UV indicator.  The
UV indicator aids in the inspection process to insure coverage of the contacts.
 We also had our MP lab review the lubricant and agreed this was a good choice.

The lubricant was added after cleaning of the connectors with alcohol as
recommended by the lubricant supplier, since these were connectors that already
exhibited the corrosion.  After cleaning the lubricant was added to the
connector pin side and mated to the VXI/VME interconnect chassis.

Conclusion is all ground programs utilizing DIN connectors, VME/VXI buss, or
cots CCA’s in these chassis should use the connector lubricant to reduce the
risk of intermittent failures from fretting corrosion.  Connector design
guidelines are found on the components engineering webpage.  The lubricant is
not recommended for airborne applications.  Airborne applications need to
specify the minimum gold thickness allowed per the components engineering
webpage guidelines.

73,

Mike
KW1ND

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Re: [Elecraft] DeoxIt and/or ProGold useage

[Don Wilhelm]

I did not really want to get into this discussion, but I now feel moved 
to make a few observations.


First, I don't believe the use of DeoxIT /ProGold will hurt anything 
*if* used properly.  I would not use DeoxIT on gold connectors or the 
ProGold on tin connectors - the effects are different.


Secondly, I observe that the copied report is dealing only with thin 
gold flashed connectors, specifically DIN connectors, and then only 
after the gold flash has been worn off.  I would not expect similar 
conditions to occur in a K3 (or K2) where the connectors are more or 
less permanent.  Yes, the temperature cycling may cause some wear, but 
most K3s will not be subjected to temperature extremes nor frequent 
cycles.  The report did not state where these connectors were used, and 
I can only imagine a rather severe environment such as that which field 
equipment may encounter.  I can understand that vibration and 
heavy-handed use may create problems.  The omitted data and information 
about the conditions may be as important as the report itself in 
determining the severity of concern.


I have had considerable experience with the K2 and with much IBM 
equipment, including both mainframes and PCs plus a lot of their 
terminal equipment, and have never encountered (nor heard of) a problem 
that could be attributed to fretting of the contact surfaces (and I 
worked in an assurance/testing group that focused on just such 
reliability issues).


In conclusion, I really don't think it is necessary, but neither do I 
think it will do any harm if properly applied - just remember, a little 
bit goes a long way.


73,
Don W3FPR

Mike B wrote:

Since I was one of those who brought up the DeoxIT / ProGold usage, I'd like to
post the following report I received from another list member.  I hope he
doesn't mind, as he'll remain nameless, and I've removed a thing or two from the
report which might identify his major aerospace company.  I found the report
rather illuminating.

  

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Re: [Elecraft] DeoxIt and/or ProGold useage

[Mike B]

I should have stated that, other than names and two pictures, that was the
entirety of the report I received.

Also, as Don pointed out, there's undoubtedly a lot more to the story than the
short summary report I was forwarded, so it's still left up to the individual
user to decide for themselves.

I still haven't decided if I'll use it or not.  If I had some on hand already,
that would probably sway my decision.

73

Mike
KW1ND
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Re: [Elecraft] Deoxit and or ProGold Usage

[Bob Nielsen]

I wouldn't want to use it unless there was a problem with the  
contacts.  I have a can of the predecessor to De-Oxit, Cramolin,  
which was about the only thing that would work for an old Compaq  
Deskpro computer I had.  The contacts of both the card slots and the  
power connector gave me fits until a ham friend suggested that I try  
this product.  It wasn't a one-time fix, either.  I had to reapply it  
every six months or so.  I haven't had similar problems with the  
dozen or so other computers I have owned, so maybe there was some  
deficiencies with that one.


Bob, N7XY
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Re: [Elecraft] DeoxIt and/or ProGold useage

[Paul]

I would like to know if it is really necessary to use DeoxIt or 
ProGold product during the K3 (or any Elecraft products) assembling 
procedure or not?


Many manufacturers, as one example, use ProGold wipes on card 
connectors on their production lines.


I use either ProGold or Deoxit on all connections, even simple stuff 
such as cells in a flashlight or remote control.


I use ProGold for plated connectors including my Schurr Profi II's contacts.

I use Deoxit for unplated brass or copper, or oxidized surfaces.

Both come in a wide variety of applicators, with a variety of 
concentrations and carriers.


My K3 kit will have ProGold on all connections.





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Re: [Elecraft] DeoxIT contact cleaner

[Tom Mc]

Hi gang.
  Does anyone know of a place (a chain store like Radio Shack, Circuit City,
etc.) that sells DeoxIT?  The web site that was posted lists the price at
$5.95 and the s/h at $7.50.  It's not that I'm a cheapskate (well maybe it
is), its just the principal of the thing (I'm sure thee $7.50 is a fair
representation of the cost to ship, don't get me wrong on that).

Anyway, if anyone knows of a place that carries the stuff that I can go it
pick it up, I;d appreciate the lead.

Tom
WB2QDG
Long Island

--
One thing I don't like about this country is that everyone gets to have his
own opinion on things!
-Original Message-
From: Tom Hammond [EMAIL PROTECTED]
To: elecraft@mailman.qth.net elecraft@mailman.qth.net
Date: Thursday, June 10, 2004 8:57 AM
Subject: [Elecraft] DeoxIT contact cleaner


One of the important points Caig Laboratories (the manufacturer) makes in
their directions is to USE LESS THEN you think you need. This stuff goes a
LONG way, and a SINGLE DROP is generally MORE THAN YOU NEED.

The $5.95 2 mL tube might last a lifetime at that rate.

They also sell Q-tip-type applicators, which help to limit the amount of
DeoxIT you take from the bottle and how much apply to the job. I've found
that using a regular Q-tip with about 90% of the cotton pulled off (to
leave just a small covering) seems to work pretty well. I've also used a
toothpick tip as an applicator with excellent results as well. The
watchword is use SPARINGLY.

Though I've not tried using it specifically, they offer an applicator
PEN  (7 mL) which appears to have a hard-felt-tipped applicator, which I'd
think would help the overexuberant user to mete out smaller amounts to such
applications as we might want to use it for.

NOTE: Caig offers much of the DeoxIT line in both 100% (100D) and 5% (5D)
dilutions. The 5% solution is supposedly for lightly oxidized contacts,
while the 100% is mentioned for more heavily 'grunged' contacts. The 5%
costs less, but might not be as widely available nor as widely usable for
the various applications we hams might want to make of it. I think I'd
still invest in the 100% solution (more is better, right?).. G

I bought the 25 mL squeeze bottle with needle applicator because I wanted
the pinpoint application ability. Having now used DeoxIT a couple times
(with good results by the way) I can see that I'd probably have been able
to save myself some $$ if I would have bought the 2 mL tube, or the 7 mL
pen.

One final note - I'd NOT recommend investing in the spray can version of
DeoxIT... WAY too much opportunity for wasting this precious (price-wise)
stuff, when so little of it is really needed.

73,

Tom Hammond   N0SS

At 10:32 PM 6/9/04, Ron D'Eau Claire wrote:
I had a similar experience with a 50-year old Speed-X semi-automatic key
(bug), Bill. It has brass contacts. I was always burnishing the contacts
every couple of days, especially the dot contacts, or they'd get
intermittent. I put some DeOxit on them several months ago and they've
worked perfectly ever since! Clearly the stuff leaves a coating that
resists a film buildup.

Ron AC7AC

-Original Message-
I have the Norcal Paddles and I really enjoy them but seem to have a
problem with lack of continuity occasionally when the contacts are closed.
Use some Deoxit D100 on the contacts. ...After using
Deoxit, the paddles have gone a year without the need for cleaning. The
small $5
tube is probably a lifetime supply.
I'd try the Deoxit before fooling with the silver contacts.

Bill  K3UJ


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