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Author Topic: Good contact cleaner for switches?  (Read 1062 times)
KE2KB
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Posts: 527




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« on: September 13, 2017, 02:18:49 PM »

Hi;
I have pretty much completed restoration of my old HW-101 Xceiver. I seem to be having some trouble with the band switch, which is a multi-wafer rotary switch. After rotating the knob a dozen or so times, it has gotten better, but I would really like to do a better job at cleaning the contacts.

Any suggestions for a contact cleaner?

Thanks

Frank - KE2KB
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K8AC
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Posts: 1739




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« Reply #1 on: September 13, 2017, 04:13:30 PM »

I use DeOxit for switches.  You can apply it to each contact with a toothpick or a fine artist's brush. 
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KE2KB
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« Reply #2 on: September 13, 2017, 04:36:38 PM »

I use DeOxit for switches.  You can apply it to each contact with a toothpick or a fine artist's brush. 
Actually, I've got some of that. But I'm not sure I will be able to work it into the switch contacts. I'll have to see if I can gain access to them without too much trouble. Otherwise, I'll have to look for something that comes in a spray.
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SWMAN
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« Reply #3 on: September 14, 2017, 04:14:56 AM »

 I use CRC , QD contact cleaner. Comes in a spray can.  You can get it at Home Depot. Works very good for me.
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KD8IIC
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« Reply #4 on: September 14, 2017, 04:57:43 AM »

  WD40 is good in a pinch!
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KA5IPF
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« Reply #5 on: September 14, 2017, 06:03:53 AM »

Don't use WD40 on Kenwoods. It dissolves the wafer material. I don't know why, they just crumble after a bit.
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KA0SBL
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Posts: 61




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« Reply #6 on: September 14, 2017, 11:26:19 AM »

I use DeOxit for switches.  You can apply it to each contact with a toothpick or a fine artist's brush. 
Actually, I've got some of that. But I'm not sure I will be able to work it into the switch contacts. I'll have to see if I can gain access to them without too much trouble. Otherwise, I'll have to look for something that comes in a spray.


Sometimes a syringe & needle works to get just a drop or two in the right place, sans oil slick in your radio.

 Grin
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KD0REQ
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Posts: 2001




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« Reply #7 on: September 14, 2017, 07:17:16 PM »

DeOxit in the original steel needle squeeze bottle can put a fractional drop just about anywhere you can stick a toothpick in.  just on the contact, please, all this stuff can arc over if there is enough DC being switched, and then you can have carbon tracks.
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KE2KB
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Posts: 527




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« Reply #8 on: September 23, 2017, 09:08:06 PM »

DeOxit in the original steel needle squeeze bottle can put a fractional drop just about anywhere you can stick a toothpick in.  just on the contact, please, all this stuff can arc over if there is enough DC being switched, and then you can have carbon tracks.
Good point. I was asking myself that question after I put some on the band switch. I don't think that switch has enough voltage on it to arc over, but some of the others do. Does DeOxit dry to a non-conductive state? Otherwise, I will have to opt for one of the sprays.
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KE2KB
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Posts: 527




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« Reply #9 on: September 23, 2017, 09:21:27 PM »

I use CRC , QD contact cleaner. Comes in a spray can.  You can get it at Home Depot. Works very good for me.
I think I'll take a run over to my local HD on Monday (not open on Sunday here in NJ) and pick up a can of the CRC.
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N1UKX
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« Reply #10 on: Yesterday at 01:30:07 AM »

DeOxit comes in a spray......
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KAPT4560
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Posts: 374




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« Reply #11 on: Yesterday at 03:21:10 AM »

 Auto parts stores have a good selection of servicing chemicals like QD and Electra-motive. Be aware that aerosol wash overspray can harm plastics and paints. 'Safe for all plastics' may not always be the case.
 I use a jewelers screwdriver tip to apply DeOxit right to where I want it. It doesn't dry up and an oil film may attract and hold dust. It may also 'wick' into areas that you don't want it to be.
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