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Identification for onboard switch needed (Receiver Pioneer A-331)

P

Phil Allison

Jan 1, 1970
0
"Trevor Wilson"
**Try using the stuff sometime. It does what it is claimed to do.
Naturally, the spray stuff is useless, but the type that you paint on,
leave for a few minutes and wipe off works very well indeed. Switches I
treated many years ago have long outlasted new replacements.


** Dismantling switches in order to merely clean the internal contacts is
plain nuts.

The stuff does NOT do what WD40, CRC 2-26 and a host other similar
fluids do in seconds - without any disassembly, waiting or need to be wiped
off.

It is not a grease solvent, not a lubricant and does not penetrate.

Snake oil mixed with turps would do better.



.... Phil
 
W

William Sommerwerck

Jan 1, 1970
0
Those who have used Cramolin, et al, for its intended purpose can safely
ignore Phil's rants.
 
T

Trevor Wilson

Jan 1, 1970
0
"Trevor Wilson"


** Dismantling switches in order to merely clean the internal contacts is
plain nuts.

**I agree. However, in certain circumstances, there is simply no other way.
The stuff does NOT do what WD40, CRC 2-26 and a host other similar
fluids do in seconds - without any disassembly, waiting or need to be wiped
off.

**Correct. It does a much better job. MUCH better.
It is not a grease solvent, not a lubricant and does not penetrate.

Snake oil mixed with turps would do better.



.... Phil

**Never tried snake oil. De_oxit/Cramolin works extremely well however.
 
P

Phil Allison

Jan 1, 1970
0
"Trevor Wilson"
**I agree. However, in certain circumstances, there is simply no other
way.

** But in 99.9% of case it is not needed at all.

**Correct. It does a much better job. MUCH better.

** No it doesn't.
**Never tried snake oil. De_oxit/Cramolin works extremely well however.

** No it doesn't.

It merely has snob appeal.

Only fools bother with that.



.... Phil
 
T

Trevor Wilson

Jan 1, 1970
0
"Trevor Wilson"

** But in 99.9% of case it is not needed at all.

**Perhaps in your experience that may be true. In mine, not so. That
said, my last bottle of Cramolin lasted 20 odd years. Less than 10ml. It
went a long way and reconditioned a lot of contacts. For the rest, I
used regular spray stuff.
** No it doesn't.

**Again, IME, it does. I've tried pretty much everything on the market.
Including WD40. Have you tried De-Oxit or Cramolin?
** No it doesn't.

**Again, IME, it does. How did you use it?

It merely has snob appeal.

Only fools bother with that.

**Nope. I use what works.
 
W

William Sommerwerck

Jan 1, 1970
0
"Phil Allison" wrote in message
[DeOxit] merely has snob appeal.
Only fools bother with that.

I must be a fool to enjoy removing the oxide layer from a conductive surface.

RCA jacks can get pretty grotty. Does DeOxit/Cramolin improve the sound? I
don't know, and I don't care. I do think it's common sense to keep contact
surfaces clean. These products can be the difference between a jack/connector
interface working and not working.
 
W

William Sommerwerck

Jan 1, 1970
0
"dave" wrote in message
A jack in frequent use self burnishes.

Good point. But not all plugs are continually removed and inserted. The
control jacks & plugs on my amplifiers need cleaning every six months or so.
 
P

Phil Allison

Jan 1, 1970
0
"William Sommerwanker "
"Phil Allison"
[DeOxit] merely has snob appeal.
Only fools bother with that.

I must be a fool to enjoy removing the oxide layer from a conductive
surface.


** Silver and gold plated connectors do NOT form oxides and even common
nickel plated ones barely form an oxide layer under normal room conditions.

RCA jacks can get pretty grotty. Does DeOxit/Cramolin improve the sound? I
don't know, and I don't care. I do think it's common sense to keep contact
surfaces clean. These products can be the difference between a
jack/connector interface working and not working.

** Most any hydrocarbon solvent followed by a bit of polishing with an oily
rag would do as well.

A little WD40 (or CRC 2-26 or Super Servisol etc) on a cloth does it in a
blink of the eye.

But one may not feel as *HOLY* afterwards as with the super expensive pink
goop.

Fools and their money ........


.... Phil
 
P

Phil Allison

Jan 1, 1970
0
"Rheilly Phoull"
Trevor Wilson wrote:
Phil said:
Would that process increase the wearing out of the pot ??

** LOL !

If you ever bothered to open a noisy or intermittently operating pot, you
usually see the same thing - a black blob is stuck to the end of the
wiper. The blob is a mixture of grease which has migrated from the bearing
and carbon dust from the track.

A little WD40 on a small brush cleans it up perfectly in seconds - because
WD40 is 90% grease solvent with a very
low surface tension.

If you squirt some into a pot through a hole or crevice, the same thing
happens but it takes a tad longer and you have to rotate the pot a few
times.

Fluids that have no or poor grease solvents simply cannot do this trick.

Include isopropyl alcohol and flurocarbons in this category - as used in so
called "contact cleaners".



.... Phil
 
P

Phil Allison

Jan 1, 1970
0
"dave= total dickhead "
If I returned a boutique amp to a customer and it smelled like WD-40 I
would likely not see that person (or any of his friends) ever again.

** You need to get some smarter customers.

And there is no need for the amp to smell.

WD-40 is something mechanics use.

** And many, many others too.

DeOxIt is something e-techs use.

** Only the gullible fuckwits like you.

And only in the USA.


.... Phil
 
P

Phil Allison

Jan 1, 1970
0
"dave= dickhead " <
No. Single turn pots (good ones) clean themselves as they are used. If
they have sat up for a while they obviously did not clean themselves while
on the shelf. I don't remember ever seeing a pot that flat "wore out".


** Dave is clearly NOT an audio tech.

Worn out pots are common sights and noisy pots cleaning themselves is
NONSENSE.

**** off fool.


.... Phil
 
P

Phil Allison

Jan 1, 1970
0
"Jeff Liebermann"
Try taking apart the pots in a joystick. They get far more use than
any front panel control pot. I've seen them with grooves worn into
the carbon that match the individual fingers of the slider. I've also
seen the same thing in volume control knobs on 2way radios that
require turning the volume control to power on/off the radio. If you
leave such a worn grooved pot in place for a long time, the
lubricating grease will "migrate" into the grooves. When that
happens, the individual fingers will float on top of the grease, and
not make contact with the carbon, resulting in an intermittent. With
flat carbon, the fingers will push the grease out of the way. With a
grove in the carbon, the fingers will push the grease into the
grooves.

This also has caused me some grief in the distant past, where I would
"lube" a pot to break loose the shaft, and get the radio back with an
intermittent volume control a few months later. However, all this is
for high use 2way radio controls. I doubt that any hi-fi or even
commodity radio control would see sufficient use (or abuse) to put
grooves in the carbon.


** I service mostly " pro audio " which includes mixing desks and the
special mixers used by DJs.

DJ mixers have a "cross-fader " that allows a pair of stereo channels to be
mixed in any proportion. Most DJs work the ring of the things - so much so
that it is standard practise make the cross-fader a "user replaceable"
module fitted on sub panel that slots into the main panel.

Nothing unusual to see cross-faders ( and channel faders) with all the tips
worn off the fingers and deep grooves in the carbon track - right down to
the phenolic backing.

Most control pots these days have the carbon track deposited on the backing
material rather the old method of using a solid, moulded track and attaching
it to a backing.

Deposited tracks are very much thinner and wear out much sooner.



.... Phil
 
L

Leif Neland

Jan 1, 1970
0
Phil Allison har bragt dette til os:
DJ mixers have a "cross-fader " that allows a pair of stereo channels to be
mixed in any proportion. Most DJs work the ring of the things - so much so
that it is standard practise make the cross-fader a "user replaceable" module
fitted on sub panel that slots into the main panel.

Are anyone using an optical fader, where moving the fader allows more
or less light to a sensor, controlling the fading?

Or should I file a patent claim? :)
 
P

Phil Allison

Jan 1, 1970
0
"Leif Neland"
Phil Allison har bragt dette til os:

Are anyone using an optical fader, where moving the fader allows more or
less light to a sensor, controlling the fading?

Or should I file a patent claim? :)


** I built such a set up for a customer in the mid 1980s.

Worked like a charm.

A few high end DJ desks have optical or VCA x-faders.


..... Phil
 
P

Phil Allison

Jan 1, 1970
0
"Michael A. Terrell"
Phil said:
"Phil Allison"
[DeOxit] merely has snob appeal.
Only fools bother with that.

I must be a fool to enjoy removing the oxide layer from a conductive
surface.

** Silver and gold plated connectors do NOT form oxides and even common
nickel plated ones barely form an oxide layer under normal room
conditions.


That's a bald faced lie, and you know it. Otherwise, no TV tuner
would have ever needed cleaning. Bird Watt meters would never give
false readings, and no one would have ever needed to polish their
silverware. Silver plated RF connectors would never overheat.


** Silver does not form an oxide under any normal condition.

If forms a sulphide layer (Ag2S ) due to air containing some H2S from
burning fossil fuels etc.



.... Phil
 
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