[Heathkit] SB200 Wafer Switches

[Fern]

Rather than reinvent the wheel, what's wrong with using Deoxit cleaner?
All the collins owners know this.
73 and Seasons Greetings from Fern


------ Original Message ------
From: "Ray Keefe" <K2RJK at thewoodenham.com>
To: heathkit at mailman.qth.net
Sent: 21/12/2021 5:55:19 PM
Subject: Re: [Heathkit] SB200 Wafer Switches

>Bruce,
>
>I've tried lots of stuff over the years, mineral spirits, alcohol, spray cleaners, lacquer thinner, pencil erasers and more. What I finally found works like gangbusters is a product used for removing the residue of paint stripping. It's called After Wash, made by Klean Strip, it's sold in quart cans about $8 at Home Depot. I use the stuff after stripping paint from wood, and out of desperation one day I tried it on a wafer switch and was amazed at how fast it worked!
>
>Be very careful with the stuff it's highly flammable, use with plenty of ventilation. I use it with cotton swabs and let it dissolve the black gunk and with some gentle rubbing the brass or copper contacts are clean. What I also do is get the wafer good and wet with the stuff and work the switch back and forth to get the wipers clean.
>
>I've even used it in pots and follow up with a shot of silicone lube, noisy controls get quiet and work smoothly.
>
>Ray
>
>K2RJK
>
>Check out my shop for handmade unique gifts for Weddings and ham radio operators WWW.THEWOODENHAM.COM
>On 12/20/2021 6:12 PM, Bruce Hudler WK3A via Heathkit wrote:
>>Hello All,
>>Me too - looking for replacement ceramic wafer switches.
>>I have (2) SB200's that need these.
>>#1 has blown rear section, possible to replace only the fingers.
>>#2 has blown front section - not repairable as the rotor and finger vaporized.
>>Harbach shows replacement rear section for $40 but not in stock.
>>   No idea who has the front section.
>>Is there something used to dissolve the tarnish on the contacts? I don't want to use anything abrasive obviously and contact cleaner won't cut it. I've used a good pencil eraser before on rotors but that doesn't get into the fingers.
>>Thanks!
>>
>>Bruce WK3A
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