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Noble
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Post subject: Cleaning Control Knobs Posted: Feb Wed 16, 2011 6:54 am |
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Joined: Dec Mon 13, 2010 7:29 am Posts: 162 Location: New Zealand
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Cleaning knobs one by one can become frustrating and a fine knurled grip pattern can make things difficult. Denture cleaner of the immerse and soak for a while type, is designed to efficiently clean both plastic and metal without damage.
With this in mind I recently gave a complete set of rather intricate knobs the treatment simultaneously with an excellent result and no other work being called for. If you have your own teeth, it is worth purchasing the stuff for this very purpose. Simply read the instructions and soak for a shine, no sweat! 
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morseguy
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Post subject: Posted: Apr Tue 19, 2011 11:22 pm |
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Joined: Aug Mon 28, 2006 3:07 am Posts: 950 Location: Boston, MA
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I surprised no one chimed in on this. I am soaking knobs right now in dish detergent and warm water right now. This is my usual method.
Your idea sounds good though.
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Johnnysan
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Post subject: Posted: Apr Wed 20, 2011 12:36 am |
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Joined: Jan Thu 01, 1970 1:00 am Posts: 16749 Location: Albuquerque, NM 87123
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I picked up some denture cleaner at an estate sale, but haven't tried it yet.
My usual routine is to soak knobs for 45 minutes or so in a mason jar with hot water and baking soda; works fine most of the time. An old toothbrush gets the knurled knobs clean.
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Radio Fixer
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Post subject: Posted: Apr Wed 20, 2011 9:08 am |
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Joined: Jan Thu 01, 1970 1:00 am Posts: 3625 Location: Nr London, England, SS1 3PT
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Small ultrasonic cleaner and a dab of detergent in warm water works fine for me.
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Chuck Schwark
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Post subject: Posted: Apr Wed 20, 2011 5:56 pm |
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Joined: Jan Thu 01, 1970 1:00 am Posts: 3465 Location: Evanston, IL
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Dawn dishwashing liquid in warm water soak for 10 mins.
Toothbrush and toothpick (if needed).
Chuck
_________________ Chuck Schwark,
The Philco Repair Bench
Schematic Photocopy Service
www.philcorepairbench.com
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divad41
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Post subject: Posted: Apr Sun 24, 2011 3:05 am |
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Joined: Aug Sun 15, 2010 4:33 am Posts: 999 Location: North Mojave Desert
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I also use the 'soak in H20/Dawn' approach. Sometimes I leave it soak for overnite or longer if really grungy. And have found the the dis-cardable vibrating toothbrushes help worry the multi-decade grime out of the inside corners.
I usually use a different one than the one I brush my teeth with... I think... er, wait a minute, I gotta go check the colors just now...
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Ken G
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Post subject: Posted: Apr Sun 24, 2011 4:11 pm |
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Joined: Jan Thu 01, 1970 1:00 am Posts: 9401 Location: ID 83301
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I have switched to Westleys tire cleaner for the most part . It will however dull bakelite . Most of the time no soaking is needed with the stuff .
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Brooklyn Radio
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Post subject: Re: Cleaning Control Knobs Posted: Apr Mon 02, 2012 4:29 am |
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Joined: Jul Sat 04, 2009 7:45 am Posts: 755 Location: Brooklyn, NY
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Go-Jo on plastic and Bakelite with a toothbrush for in and out of crevices, rinse with water and let dry. Followed by a spray of novus polish # 1, let dry and with a shoeshine brush you can buff them up like glass. Vin
_________________ Vin
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Brooklyn Radio
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Post subject: Re: Cleaning Control Knobs Posted: Apr Tue 03, 2012 4:15 am |
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Joined: Jul Sat 04, 2009 7:45 am Posts: 755 Location: Brooklyn, NY
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What do you folks use on wood knobs? I was told by an ARF member to use nothing. He said that any cleaning or polishing liquid if it found even a slight crack could further the knobs demise. Vin
_________________ Vin
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jgj6331
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Post subject: Re: Cleaning Control Knobs Posted: Apr Tue 03, 2012 1:19 pm |
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Joined: Nov Thu 08, 2007 4:37 pm Posts: 2804 Location: Tiger, GA 30576
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If you're going to use a toothbrush, cut the bristles off to a length of 1/8" to 1/4" with scissors first. It will stiffen the bristles and you'll be surprised how how much better it works with this quick and easy haircut. I use Windex and a dish washing soap with the modified brush. Some folks swear by flux brushes with the bristles trimmed - but the old toothbrushes are free - and I'm cheap!!!! 
_________________ JG Jackson
"Uva Uvam Videndo Varia Fit"
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Noble
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Post subject: Re: Cleaning Control Knobs Posted: Apr Thu 05, 2012 7:24 am |
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Joined: Dec Mon 13, 2010 7:29 am Posts: 162 Location: New Zealand
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Thanks, you rocked my brain.
I just took your obviously excellent advice and it sure worked but, I could not cut the nylon bristles with scissors and had to resort to a sharp knife and cutting board. LOL
_________________ No Bull !
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Johnnya101
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Post subject: Re: Cleaning Control Knobs Posted: Jun Sat 17, 2017 2:50 pm |
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Joined: Jun Thu 01, 2017 11:49 pm Posts: 170 Location: Lancaster NH
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Sorry for bumping such an old thread...
I'm cleaning up some Bakelite knobs for my radio, and when I took them out of the water they were soaking in, some white blotches appeared. I scraped off the remainder. I'm going to guess that was lacquer? What stuff should I use to replace it?
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engineer
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Post subject: Re: Cleaning Control Knobs Posted: Jul Mon 24, 2017 10:58 pm |
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Joined: Nov Fri 10, 2006 12:24 am Posts: 2867 Location: Thornhill, Ontario, Canada
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I've used an electric toothbrush with tooth paste. Cheers, Roger
_________________ Roger Jones, Thornhill, Ontario Ontario Vintage Radio Assoc. http://www.ovra.ca
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DenisN
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Post subject: Re: Cleaning Control Knobs Posted: Jul Mon 31, 2017 4:05 am |
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Joined: Oct Sun 18, 2015 2:49 am Posts: 348 Location: San Angelo, TX
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I've used ArmorAll a lot with good success. Some elbow grease maybe in order with the shortened toothbrush bristles, but no damage! Also used Dremel tool polishing on Bakelite knobs with great success. Works on chrome too! Denis
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radiowizard
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Post subject: Re: Cleaning Control Knobs Posted: Aug Fri 04, 2017 7:30 pm |
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Joined: Jul Sat 15, 2006 3:54 am Posts: 3212 Location: Zeeland MI
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Johnnya101...do you have hard water? Could be mineral deposits... RW
_________________ "And now, for something completely different.."
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Jim Dutridge
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Post subject: Re: Cleaning Control Knobs Posted: Aug Fri 25, 2017 10:04 pm |
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Joined: Jan Thu 01, 1970 1:00 am Posts: 7484 Location: Toledo, Ohio
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Scrubbing Bubbles and a toothbrush works well also.
_________________ Jim KE8GMW ------------------------ "AC volts and DC volts and little lamps and lities..."
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Kestas
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Post subject: Re: Cleaning Control Knobs Posted: Aug Tue 29, 2017 2:45 pm |
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Joined: Apr Wed 24, 2013 10:08 pm Posts: 1433 Location: Highland & Livonia, MI
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I'm lucky to have access to an ultrasonic cleaner at work and lots of good chemicals made for cleaning. In my arsenal of chemicals I have:
- Alconox (strong detergent) - Micro 90 (good for cleaning metal tarnish) - Alcohol - Simple Green - Castrol SuperClean (same as Easy-Off oven cleaner, but without the foaming action)
A toothbrush often helps things along.
So, there's a lot of good advice in the above posts. Start with the gentlest method available and work your way up until they're clean.
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