[sdiy] Ultrasonic cleaners and key grease - opinions sought!

[Ben Bradley]

This thread might be more than you want to know (1800 posts) and it's
a narrow application (ultrasonic cleaning of LP records), but it tends
to have useful observations and experiences with various models,
cavitation, and the effects of frequencies from 20kHz to 80kHz.
http://www.diyaudio.com/forums/analogue-source/218276-version-ultrasonic-record-cleaner.html

On Wed, Nov 15, 2017 at 10:34 AM, Roman Sowa <modular at go2.pl> wrote:
> Hi,
> do not clean the keys in ultrasonic cleaner.
> Ultrasonic can and will melt the surface of nice smooth plastic up to the
> point where it looks like splatered with solvent and bubbles.
> Keys always go to water wirth soap, then smooth sponge, nothing else.
> Sometimes I polish them with felt.
>
> I've had 3 ultrasonic cleaners so far. Stay away from cheap junk that's good
> to clean eyeglasses, and they are effective in the same way regardless if
> you turn it on or off. My unit is 400W and despite being not the best, it
> does its job. I managed to melt my Hammond drawbars once in there, oh that
> was an experience!
>
> As for key grease, I'd try teflon grease
>
> Roman
>
> W dniu 2017-11-15 o 15:07, Steve Lenham pisze:
>
>> Hi,
>>
>> I wondered whether I could tap into the group's wisdom on a couple of
>> things.
>>
>> First, I'm tempted to invest in a small ultrasonic cleaning bath. I have
>> lots of keyboard instruments to restore, and it looks like that might be a
>> quick and easy way of cleaning the keys themselves (and much more). eBay is
>> full of cheap no-brand Chinese units, and I am curious whether anyone has
>> already tried one of them. Are they too good to be true? Anyone care to
>> recommend a particular type?
>>
>> I'm aware of the risks and tradeoffs with buying this kind of cut-price
>> stuff, but there is a whole spectrum between "cheap and cheerful" and
>> "totally unusable" - hence the question.
>>
>> Second, and slightly related, is the subject of "key grease", i.e. the
>> grease for key pivots when reassembling keybeds. Sellers will happily charge
>> large amounts of money for tiny amounts of this, but is there really
>> anything special about it? Does it require particular properties (besides
>> being suitable for plastic)? Silicone or silicone-free? Again,
>> recommendations would be great.
>>
>> Thanks for any advice.
>>
>> Cheers,
>>
>> Steve L.
>> Benden Sound Technology
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