Lubricant for pots?

On Tue, 16 Mar 2010 20:36:30 +1100, John G wrote:

Servisol was a good contact and pot cleaner years ago but I have been
away from that area for too long to know if it still around.
Click to expand...
Contained 1.1.1 trichloroethane, IIRC. Caused long term failures in
stressed plastics, eg. polystyrene.

--
"Electricity is of two kinds, positive and negative. The difference
is, I presume, that one comes a little more expensive, but is more
durable; the other is a cheaper thing, but the moths get into it."
(Stephen Leacock)
 
In article <hnfl2r$m6l$1@news.eternal-september.org>,
pawihte@fake.invalid says...
What common substance would be acceptable as a lubricant for
consumer grade volume control pots? It's no good recommending a
branded product to me as I live in a place where such products
are unlikely to be available. Thanks.



I don't know if this has been mentioned in the thread or not, but how
Click to expand...
about CAIG Labs Deoxit FaderLube?

www.caig.com
 
"George Herold"

Perhaps a stupid question;

** Certainly is that.

What about conducting greases?


** What about them ?


I have some silver filled grease.


** Wanna totally ruin a pot ?




...... Phil
 
On Mar 14, 4:06 am, "Phil Allison" <phi...@tpg.com.au> wrote:
"pawihte"





Phil Allison wrote:
"pawihte"

What common substance would be acceptable as a lubricant for consumer
grade volume control pots?

** Pots do not need lubricating.

How about you post a question properly for once ?

What is the actual problem with the pots ??

This is not about a problem with a particular pot. Many inexpensive carbon
pots develop intermittent contacts and scratchy sounds in audio. This
happens both with pots fitted in a product by a manufacturer and with pots
bought from a shop. Some become defective within a couple of months of
regular use, especially in a dusty environment and/or if they have dc
current passing through them. Replacing them with better quality pots is
not always an option. Flushing with a solvent usually makes them OK again
for a while, but this also takes out the lubricant and makes the track
wear out more quickly.

** Totally mangled nonsense -  the track of a carbon ( or other) pot has no
lubricant applied during manufacture.

Any lubricant that resided on the track would prevent operation -  cos
lubricants are insulators.

Rapidly evaporating solvents are rarely any use for fixing  noisy pots while
slow evaporating ones that leave a thin oil residue are very good at the
job.

Also, rotary pots do not get " dust " inside them.

What actually causes all the trouble is a when a mix of fine carbon
particles from the track and grease from the shaft bearing accumulate on the
fingers of the two wipers and render them partially non conducting.  Also,
the metal to metal wiper contacts suffer from surface contamination by the
moisture and sulphides in the air -  a thin oily film helps prevent any
recurrence of this.  The oil must be thin that rotating the pot displaces
all of it from the contact areas.

A mix of oil and petroleum solvent has a very low surface tension so easily
travels by capillary action to cover all the insides of a pot.

There is a very famous product that fits the bill exactly ......  W
something ......

One uses only a small amount ( a few drops) and then rotates the pot many
times to help it do the trick  - repeating the process only if necessary.
If the pot is still noisy -  replacement is the only option.

BTW

 Some 100mm fader pots I looked at a week back did not respond to the above
treatment  -  when opened up I found the finger contacts on the slider were
worn completely away  !!!

....  Phil- Hide quoted text -

- Show quoted text -
Click to expand...

Thanks Phil, I always wondered what was going on. I sometimes just
exercise a noisy pot. (Turn it back and forth several times.)

George H.
 
On Mar 14, 5:49 am, "Phil Allison" <phi...@tpg.com.au> wrote:
"pawihte"

** Totally mangled nonsense -  the track of a carbon ( or other) pot has
no lubricant applied during manufacture.

Maybe not within your experience, but some manufacturers certainly do
apply lubricants on the track.

**  Bollocks.

Any lubricant that resided on the track would prevent operation -  cos
lubricants are insulators.

That's why I had to ask about suitable substances. Some of them were still
working flawlessly with "grease" on the tracks when I opened them. In most
cases, the lubricant had been pushed into a ridge right beside the wiper
path.

** Then there is  NONE  lubricating the conducting surfaces  !!!!

    You earlier claim is 100% bogus.

Also, rotary pots do not get " dust " inside them.

They most certainly do.

** Utter bollocks.

If the pot is still noisy -  replacement is the only option.

As I said at the beginning, it is sometimes difficult to get a replacement
of the same type.

** Your problem.

I've come across such wear effects too, but that's not what I was talking
about. What I did mention was that they wear more rapidly without
lubricant.

** There can be NONE on the conducting surfaces.

   Your thinking is totally irrational.

   And you're an arrogant pig.

.....  Phil
Click to expand...
Perhaps a stupid question; What about conducting greases? I have some
silver filled grease.

George H.
 
On Tue, 16 Mar 2010 20:36:30 +1100, John G <greentest@ozemail.com.au>
wrote:

On Mon, 15 Mar 2010 01:33:27 +0530, "pawihte" <pawihte@fake.invalid
wrote:

Tim Wescott wrote:
pawihte wrote:
pawihte wrote:
What common substance would be acceptable as a lubricant for
consumer grade volume control pots? It's no good recommending
a
branded product to me as I live in a place where such
products
are unlikely to be available. Thanks.

Thanks to those who posted helpful replies. It's been a long
time
since I had to bother with noisy pots. When I did such things
regularly, contact cleaners were just things I read about in
foreign magazines. I think they're available in local shops
now.
Anyway, the stuff I found inside pots were accumulated dust,
lint
and unidentified fuzz and grit that were sometimes so thick
that
I'd still prefer to open up the pot, wash it with a solvent
and
then apply the lubricant manually.

Back when I kit-built my radio control gear, the pots got
lubricated
with petroleum jelly (Vaseline, to violate your "no brand name"
rule).

Don't blame me if you find a brand of pot that gets dissolved
by it,
though.

Vaseline is so common that I'll count it as generic. Thanks for
the info.

I accept you did not want a brand name but some products have a very
limited range of suppliers.
Servisol was a good contact and pot cleaner years ago but I have been
away from that area for too long to know if it still around.

Of course steel wool is still a very common POT cleaner.
Click to expand...
An appropriate grade of strainer, to remove the seeds, works best.
--
John
 
On Fri, 19 Mar 2010 13:12:30 -0500, John O'Flaherty <quiasmox@yeeha.com>
wrote:

On Tue, 16 Mar 2010 20:36:30 +1100, John G <greentest@ozemail.com.au
wrote:

On Mon, 15 Mar 2010 01:33:27 +0530, "pawihte" <pawihte@fake.invalid
wrote:

Tim Wescott wrote:
pawihte wrote:
pawihte wrote:
What common substance would be acceptable as a lubricant for
consumer grade volume control pots? It's no good recommending
a
branded product to me as I live in a place where such
products
are unlikely to be available. Thanks.

Thanks to those who posted helpful replies. It's been a long
time
since I had to bother with noisy pots. When I did such things
regularly, contact cleaners were just things I read about in
foreign magazines. I think they're available in local shops
now.
Anyway, the stuff I found inside pots were accumulated dust,
lint
and unidentified fuzz and grit that were sometimes so thick
that
I'd still prefer to open up the pot, wash it with a solvent
and
then apply the lubricant manually.

Back when I kit-built my radio control gear, the pots got
lubricated
with petroleum jelly (Vaseline, to violate your "no brand name"
rule).

Don't blame me if you find a brand of pot that gets dissolved
by it,
though.

Vaseline is so common that I'll count it as generic. Thanks for
the info.

I accept you did not want a brand name but some products have a very
limited range of suppliers.
Servisol was a good contact and pot cleaner years ago but I have been
away from that area for too long to know if it still around.

Of course steel wool is still a very common POT cleaner.

An appropriate grade of strainer, to remove the seeds, works best.
Click to expand...
---
I like the lid of a shoe box at about 30°.

JF
 
On Fri, 19 Mar 2010 16:37:25 -0500, John Fields
<jfields@austininstruments.com> wrote:

On Fri, 19 Mar 2010 13:12:30 -0500, John O'Flaherty <quiasmox@yeeha.com
wrote:

On Tue, 16 Mar 2010 20:36:30 +1100, John G <greentest@ozemail.com.au
wrote:

Of course steel wool is still a very common POT cleaner.

An appropriate grade of strainer, to remove the seeds, works best.

---
I like the lid of a shoe box at about 30°.
Click to expand...
Bandpass, band-reject - six of one...
--
John
 
On Thu, 18 Mar 2010 22:21:43 -0700 (PDT), George Herold
<ggherold@gmail.com> wrote:


Perhaps a stupid question; What about conducting greases? I have some
silver filled grease.
Click to expand...
---
Funny!

View in courier:

|
+-----+
| |
[POT]<--+---
| |
+-----+
|

JF
 
On Mar 14, 6:29 am, "Phil Allison" <phi...@tpg.com.au> wrote:
"pawihte"

 Your thinking is totally insane.

 And you're a pig ignorant turd.

  Drop dead.

.....  Phil
Click to expand...


Got you panties in a twist - - - again !!
 
On Mar 19, 1:21 am, George Herold <ggher...@gmail.com> wrote:
On Mar 14, 5:49 am, "Phil Allison" <phi...@tpg.com.au> wrote:





"pawihte"

** Totally mangled nonsense -  the track of a carbon ( or other) pot has
no lubricant applied during manufacture.

Maybe not within your experience, but some manufacturers certainly do
apply lubricants on the track.

**  Bollocks.

Any lubricant that resided on the track would prevent operation -  cos
lubricants are insulators.

That's why I had to ask about suitable substances. Some of them were still
working flawlessly with "grease" on the tracks when I opened them. In most
cases, the lubricant had been pushed into a ridge right beside the wiper
path.

** Then there is  NONE  lubricating the conducting surfaces  !!!!

    You earlier claim is 100% bogus.

Also, rotary pots do not get " dust " inside them.

They most certainly do.

** Utter bollocks.

If the pot is still noisy -  replacement is the only option.

As I said at the beginning, it is sometimes difficult to get a replacement
of the same type.

** Your problem.

I've come across such wear effects too, but that's not what I was talking
about. What I did mention was that they wear more rapidly without
lubricant.

** There can be NONE on the conducting surfaces.

   Your thinking is totally irrational.

   And you're an arrogant pig.

.....  Phil

Perhaps a stupid question; What about conducting greases?  I have some
silver filled grease.

George H.- Hide quoted text -

- Show quoted text -
Click to expand...


It might be difficult to keep it where you want it,
 
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