# 263 Watch Masters Ultrasonic Cleaner Repair
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- čas přidán 7. 11. 2021
- Sorry for the technical difficulties during the video. Had some issues with the camera I was using and lost a lot of footage.
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Very interesting! I've never seen an ultrasonic cleaner that used tubes like that. Thanks for sharing. Great repair!
I thought that was very interesting to see the tubes in it. Simple oscillator circuit. Thanks for stoppy by Tony.
Hi Buddy! Good to see you on CZcams again!. As always we learn something new. Take care!
Thanks Mike and thanks for watching
Fascinating bit of kit, I'm still trying to get my head around how the circuit actually works given that they don't even rectify the high voltage. Thanks for posting the video and for taking on the repair, I think we've all learned something from this one.
It is a very interesting unit. Perhaps when I can get time I will do a video on just the schematic so we can see how it works.
I'm guessing that because tubes can take a high peak inverse voltage, and the circuit is just oscillating, a rectified B+ plate voltage is somehow just not needed. (Yes Buddy, I'd be interested in a video on how it operates too!)
Wow. That turned out to be a lot more involved than I thought it was going to be. De-soldering that resistor to check it was definitely an 'Ah-Ha' moment! Just goes to show you can't assume anything. Great job. Thanks for sharing!
Simple but complexe unit. When there are tubes always a good idea to check everything. Thanks for the comment.
HALLOWEEN DONUT AND COFFEE! Life is Good.
Neat machine. Thanks for the repair video Buddy.
Yes and was good also. Thanks
Fascinating. I can remember when tube stuff and nice heavy chassis was the norm back in the day. Nice repair kid!
Miss them old days. That tell us how old we are lol.
What better way to spend a morning than with a good cup of hot coffee and Buddy sharing his electronics knowledge. 👍
Thank you Mike
Impressive how this old equipment used to be constructed. Very solid, simple and effective - and maintainable. Nice video, as always a pleasure! Thanks Buddy!
Really built to last. Thanks for watching.
Never seen one of those Buddy. Built like a tank like most old stuff. Good to see u back on deck.
Good old USA quality. Thanks Peter.
Big fan of tube gear. All my Ham gear is Johnson Viking Transmitters and Tube Receivers. Great repair. Keep up the Great Work! 73 W3AMT
Thanks you Richard. I love the Johnsons also. Have 3 Viking II's and a Ranger.
Buddy, a very detailed repair and it looks wonderful too. I had never seen one of these, so I appreciate you taking the time to capture this and share with us. All the best. Don
Thanks Don. First thing that came to me was I have to do a video on it. Very rare to see such a unit come in. As always thanks for stopping in.
Glad you're back. Cool video. Thanks for showing it Buddy! Steven
Thanks for watching!
Great job Buddy. Good to see you back. Very interesting.
Thanks you Bill
What a crazy unit! Thanks for the video Buddy!
Thank you
Excellent video. My Grandma used to have one of those cleaners. They work well for cleaning jewelry. Thanks for sharing it with us, Buddy. You hit another home run. 73 DE K7RMJ Frank
Thanks Frank. They are some great units. Several thousand dollars new.
Interesting video! Thanks for bringing us along!
Thanks for watching.
Very interesting, I enjoy the old classic electronic construction. Very little plastic, lots of metal construction, USA made to last.
Simple circuit from the day. Very well built.
Interesting video for a interesting piece. Way cool. Like the way you troubleshoot. Stay safe, hope family is all well.
Thanks for the nice comment
Good job something you’re not familiar with but you’re pretty clever so I figured it out
Cool project! Good Job.
i am just building a 250 watt one of these,was supprised the transducers run at over 1kv!
That is one interesting piece of equipment Buddy.
I can't understand why they have AC on the tune plates.
No DC required :) I found that very interesting myself Bill.
That little spring you found is one of two on that cut out relay that closes when you turn the switch to second position. Guess yours is working with just one spring
You did a job good job was something you was not familiar with I know you figure it out keep up the good work God bless
Thanks 👍
Thanks Buddy 👍🇬🇧
Thanks
Interesting video! you see a lot of these machines used on restoring watches etc. Couple of questions for you. 1. how are you getting along with the Sparton 301 radio restoration? 2. how did you make out with the property you bought next to you? other than that it is good see you on the channel. Hart va3kis.
Been waiting on cooler weather to get back on the Sparton. It is here now :-) . Property all secured. Got it pretty much cleaned off and need to get those concrete slabs removed. Thanks for asking.
Great vid! Thanks!
Yes indeed, quite fascinating!
Very!
Thanks for the video i enjoyed it a lot.
Thanks for watching
4:56 on the back of old tv sets. Masonite? Same stuff clipboards are made from.
May be but not sure. Or somce kind of compressed wood/paper.
4:28.. 1 day and 17 years before I was born
Makes me feel old lol. It is one year older than me.
At 29:46, it looks like a 47Ω not a 470Ω Maybe the 3rd band is brown, but it looks black to me.
It is a 470. Trust me it is brown. Camera does it no justice with these type of resistors, very high gloss.
Nice work as usual Buddy. Did you change out the line caps with new Y-type safety units? Bet the owner was glad to have this beauty back! 73 - Dino KLØS
Interesting the line caps were not present. But I did install some for protection. At least it was fused unlike my cheap chinese unit. Owner said it never worked as good as it does now.. Thanks for stopping in Dino.
I noticed the one tube had a tank circuit on the grid. What frequency do you think this was oscillating at?
It is running at about 38 kHz.
I have one these ultrasonic cleaners that I owned since 1977 that’s currently not working. The fan motor is not turning on when turning the timer on. If I can’t get it repaired locally would you be willing to go over it? Thanks,
I have one that I replaced transformer with new ones I had made, replaced the switch which often fails and both tube tested 100%. Both tubes light up with turning on switch but no ultrasonic action on either wash or rinse. If I let it run long enough on its side the inner tube starts flashing and blows the fuse. Running it flat seems to be ok. I’m suspecting these resistors you replaced. Did u make a list of the resistors you changed? I do use match tubes. If I can’t get it sorted where are u located and can I send this one to you?
Really interesting, I have followed you for a long time and enjoy your videos, I have a question I'm not an expert at electronic so I hope you can help me, for about 40 years ago I built a variable power supply that went from 0 to 24 volt DC it not working anymore now I'm trying to fix it, It use one 2N3055 transistor and two BC 142 transistors I think the BC142 is burnt out I have the 2N3055 but I can't find the BC 142 they are on eBay but because of tax and fees it's extremely expensive to get from eBay here in Denmark I can't figure out if there is a other transistor I can use instead that is more common today, I now you get a lot of questions and I understand if you don't have time to answer, it ok I understand.
Hi from Henning
Hi buddy just a quick question have you heard from Mike and is he going to do anymore videos thank you keep up the good work
Not a word from hin, sorry
😊
Hi ,I have new design fast charging power bank built in multi cables ,could i cooperate with you ?
Amazing, old equipment came with schematics; not today with today's hidden/confidential information. Just throw it out and buy another one "thank you" business model.
The truth is, you don't even get the 'thank you' in reality these days.
Agreed, one reason I like the old stuff. Most the stuff today no schematics were produced