Jump to content

L & R Maxomatic Ultrasonic


JerseyMo

Recommended Posts

Has anyone here worked on an ultrasonic such as this one?  L&R Maxomatic..

I was told it will smoke when powered up. After opening it up I pulled the tube and right away I see it failed because the top cap fell off!

Also I noticed debris inside which of course is not a good sign either.  

So what to do?  I found a used tube for BIN at $20.00 and best guess is the machine is maybe worth $40.00 Is it something I should get into just for the fun of it?

Heck yeah, what is the worst I can be other than burning down the house :)

 

 

IMG_1158.jpg

IMG_1159.jpg

IMG_1160.jpg

IMG_1161.jpg

  • Like 1
Link to comment
Share on other sites

As long as your competent with mains electricity wiring and your doing it just for yourself, go for it.

I don't know what the electrical laws are in the USA, but in Australia you would actually need a restricted electrical lenience to work on something like that.

A valve driven ultrasonic cleaner, that a first on me, I didn't even know they had been making them for that long.

Link to comment
Share on other sites

Hi  Guys  I have an international ultrasonic valve driven  the machine works ok but the ultrasonic does not, Bought as a project several years ago still waiting to be done. I will post some pics sometime..  As JerseyMo's one is a single valve, get stuck in and have a go, It might make a big bang so power it up in the yard.:D

Link to comment
Share on other sites

I was told the machine was made in 1975 but did not verify that.  No matter as I did go ahead and order a replacement tube. Someone else advised to replace any electrolytic caps. But, there are only two disk caps inside.  

I am assuming 'valve' is the same as 'tube'?

License?  Sure I got one of those!  

forgot to mention - you see the maker is located in Kearney NJ.  that is just a few miles from where I picked this machine up.

Edited by JerseyMo
Link to comment
Share on other sites

20 hours ago, luiazazrambo said:

If this is the same as yours ( nawcc ) the schematic might help you. If there is smoke there is a reason for that and you probably have to eliminate that otherwise you will end up replacing parts in an endless loop.

 

Thanks, I came across that data sheet as well. The tube replacement will be as far as this repair attempt will go.  

Link to comment
Share on other sites

Hi   here are a few pics of my ultrasonic bought some years ago as aproject, got to get it done.

Its a british made National ultrasonic watch cleaner, It all works,motor,heater. The ultrasonic is dead and there is no life in the Valve(tube)  812A  Amplifier so the clean up begins an then I shall get a valve for it..

What was the one you got JerseyMo, was it the same an 812A,?...

DSCF3272.JPG

DSCF3273.JPG

DSCF3274.JPG

DSCF3275.JPG

DSCF3276.JPG

Link to comment
Share on other sites

6 hours ago, watchweasol said:

Hi   here are a few pics of my ultrasonic bought some years ago as aproject, got to get it done.

Its a british made National ultrasonic watch cleaner, It all works,motor,heater. The ultrasonic is dead and there is no life in the Valve(tube)  812A  Amplifier so the clean up begins an then I shall get a valve for it..

What was the one you got JerseyMo, was it the same an 812A,?...

 

Yes, I found a 812A on ebay.

Link to comment
Share on other sites

43 minutes ago, watchweasol said:

Hi JerseyMo     I dont know if you have the schematic for the L&R machine.  I found this whilst researching my national, Its not over good but better than nothing  if you are without.       Cheers 

Schematic.jpg

Thanks,  the cleaner will be going back to work at my watchmakers shop. He had given it to me for an 'AS IS' sale on ebay. but of course I could not resist to take it apart and figure out why it was not working.  I should have told him it was just 'over wound'  and needed a servicing.   :)

Link to comment
Share on other sites

Nicely done.

Yes Valve and tube are the same thing, I still find it amazing that we can all be talking the same language and sometimes still not know what each other means. due to georgraphic variations of some words.:D

The one that creates the greatest confusion between Australia and the UK is the little rubber 'shoe' you put on your feet.

In the USA I think you call it a 'flip flop' in the NZ they are called Jandles (No idea why), in Australia we call them 'thongs' which I know in the UK and I think the USA is skimpy bathers which in AUstralia are called G-strings.

You can imagine the looks I got when I first went to the UK and told people that in the summer in Australia it was generally too hot to wear shoes and so I would usually just wear my 'thongs' :D

Link to comment
Share on other sites

according to Urban Dictionary

After a japanese swimming team came to NZ (many decades ago), one observer was so impressed with their style of footwear that he began making them himself - he came up with the word "Jandal" as an abbreviation of the term "Japanese Sandal"

 

 

 

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.



  • Recently Browsing

    • No registered users viewing this page.
  • Topics

  • Posts

    • In the meantime whilst awaiting a better plan, please drop me a quick hello on my email. 
    • I looked at it like this, I've built a lot of stuff in my time, building structures and furniture,those are my creations and they will still be here way way after I'm gone. Traditional watchmakers felt the need to pass their knowledge on, ideas that they created . I assume with them as it is with me, leaving their mark on the earth, a way of being remembered. This creation of Mark's has brought thousands of people together to pass their knowledge around,  ideas that will continue to be used for lifetimes. Ideas that should continue to be procured. If for whatever reason the forum ceased to exist, not quite like Ranfft's, that didn't disappear but much less usable. Then that is sad, such a massive loss of communication between good people and a wealth of knowledge lost. There should be something in place for when that happens which could be next week, next year or in 10 years. Might not be a topical subject for a lot of folk or boardering on controversy, i did say i talk about stuff other people dont. But if you dont talk about it and something happens then you've lost it and you ain't gonna fix it .
    • I've remained silent on this thread, and at the risk of upsetting everyone, the thing that worries me the most the the apparent absence of Mark. The moderators do a great job and the members also pitch in, and the site seems to run itself, but it is a concern for the future of this forum when the owner is absent for all intents and purposes. Like many of the comments above I would hate to log in one day and things be closed down as I rely on this site for ideas and knowledge and also cheer me up. maybe the Moderators could reach out to him, assuming he does not read this thread, and express our concerns and let us know the plans going forward? some kind of WRT ark
    • That was the exact reason for me starting this thread watchie. Still we haven't worked out how the regulars are going to hook up if it goes tits up. I honestly think something should be arranged to stay in contact, we all help each other so much. 
    • Yeah ive watched that a few times before,  i couldnt find my old school dividers to scribe it up 😅 Yep thats the guy i bought a roll from . Thanks Nicklesilver that answers that perfectly and more or less what i thought an experiment over time would prove . The jumper arm is quite thick along its length, i left it that way intentionally, i thought the original was probably very thin, i didnt see that it was already missing. Setting isn't particularly stiff as such just positive, i still need to take it out and polish where it mates with the stem release. 
×
×
  • Create New...