I have a Chinese made telephone with a hook switch that is generating a ton
of noise. Disassembly revealed a DPDT switch made by having the top of U
shaped phosphor bronze contact springs sliding along the sides of tin/silver
coated brass contact tabs.

I have given it thorough clean and need to know what, if any, lubricant
should be used on the contacts before I reassemble it.

Help appreciated, John.

Machinist60 wrote in message
...
I have a Chinese made telephone with a hook switch that is generating a
ton
of noise. Disassembly revealed a DPDT switch made by having the top of U
shaped phosphor bronze contact springs sliding along the sides of
tin/silver
coated brass contact tabs.

I have given it thorough clean and need to know what, if any, lubricant
should be used on the contacts before I reassemble it.

Help appreciated, John.


Assuming now clean, phosphor bronze should not need lubricating. Perhaps
neachanically add, by bending or something, some extra spring action
(something less than handset weight of course)

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/

"N_Cook" wrote in message
...
Machinist60 wrote in message
...
I have a Chinese made telephone with a hook switch that is generating a
ton
of noise. Disassembly revealed a DPDT switch made by having the top of U
shaped phosphor bronze contact springs sliding along the sides of
tin/silver
coated brass contact tabs.

I have given it thorough clean and need to know what, if any, lubricant
should be used on the contacts before I reassemble it.

Help appreciated, John.


Assuming now clean, phosphor bronze should not need lubricating. Perhaps
neachanically add, by bending or something, some extra spring action
(something less than handset weight of course)

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/






I did bend some extra tension into the spring action. It is now assembled
dry and so far so good.

Many thanks for the advice, John.

On Mon, 7 Sep 2009 21:16:29 -0400, Machinist60 wrote:

I have a Chinese made telephone ...

Well, there you go.