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 Post subject: OOPS!
PostPosted: Apr Mon 12, 2021 10:02 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 7586
Location: Toledo, Ohio
I finally got my Thompson V50 running and was cleaning up the cabinet and knobs. tried using Dawn dishwashing soap and a soft toothbrush to clean the dial knobs. Didn't work so well trying to clean out the dirt from the fine ridges on the knobs.

Enter my ultrasonic cleaner. I placed one of the knobs in a small bowl of Simple Green which was placed in the ultrasonic. 8 minutes later I had the ridges cleaned out ALONG WITH THE NUMBERS ON THE DIAL!!!. Now I have to get the wife to repaint the numbers and lines since my hands are not steady enough to do it.

Note to one self, DO NOT use the ultrasonic cleaner to clean 20's radio tuning knobs.

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Jim
KE8GMW
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I have flying monkeys and I know how to use them.


Last edited by Jim Dutridge on Apr Tue 13, 2021 8:49 pm, edited 1 time in total.

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 Post subject: Re: OOPS!
PostPosted: Apr Tue 13, 2021 1:39 am 
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Joined: Mar Sat 14, 2009 5:56 pm
Posts: 4544
Location: VA 22602
Jim, it can be done even with shaky mits. You fill the etched numbers and grooves with “white-out” and run a rag dampened with alcohol across the knob to remove the excess before it dries hard. If wiped smoothly you leave the numbers and grooves filled. I have knobs on battery sets which I did that process to back in the seventies and they still look good. It sure beats filling numbers individually along with 101 grooves. I have also used off-white paint but that was more work so I returned to using “white-out”. Give it a try.

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 Post subject: Re: OOPS!
PostPosted: Apr Tue 13, 2021 3:39 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 15920
Location: S. Dartmouth MA 02748-1225 USA
Markal B White Paint stick is my choice to fill the engraved intaglio. It is not as bright a white as LaCo Lacquer stick and it is less expensive. The white will turn a light wheat color in a few weeks time so it will look aged.

Paint sticks are wiped on the engravings and excess removed with a rag lightly dampen with mineral spirits, takes a week or so to cure.

Both products have the same parent company... chas

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 Post subject: Re: OOPS!
PostPosted: Apr Tue 13, 2021 9:55 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 7586
Location: Toledo, Ohio
Thanks for the tips.

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Jim
KE8GMW
---------------------
I have flying monkeys and I know how to use them.


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 Post subject: Re: OOPS!
PostPosted: Apr Wed 14, 2021 12:34 am 
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Joined: Aug Tue 21, 2012 1:19 am
Posts: 185
Location: Southern Ontario
My oops, oh darn. I was cleaning the gears from a motor driven tuner so dropped them into the ultra sonic cleaner and covered them with lacquer thinner. I then wondered why the thinner was turning white. Turned out the plastic basket melted into a white goo and the plastic rim of the cleaner is now re-shaped. Stupid thing is I know lacquer thinner and plastic don't mix! But, late at night and old brain.

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If you can't figure it out, cool the iron and start your day over.


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 Post subject: Re: OOPS!
PostPosted: Apr Wed 14, 2021 12:51 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 38164
Location: SoCal, 91387
"OOPS!" The one thing you don't want to hear from either your tax accountant or your heart surgeon... :wink:

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 Post subject: Re: OOPS!
PostPosted: Apr Thu 15, 2021 2:35 am 
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Joined: Dec Sat 24, 2011 9:17 pm
Posts: 7617
Location: Vancouver Island, Canada
fifties wrote:
"OOPS!" The one thing you don't want to hear from either your tax accountant or your heart surgeon... :wink:
Or your dentist.

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Burl Ives, RIP, oldtimer.
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