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Paul Blakeslee
เข้าร่วมเมื่อ 13 ก.ค. 2011
Working (!!!) Wang 300 series scientific 360kt calculator.
What turned out to be a November-09 winter project almost went into summer-2010.
After much work this calculator is 100% operational. These are very rare in any condition. They are impossible to find in working condition. The scientific 360KT trip keyboard is amazing. In my 20 years following Wang calculator technology I have never seen or heard of another working 360kt.
This is my repair log:
I started with dead calculator in 10/2009.
I bought it as "works fine" off EBAY. Was ripped off...it had many issues.
This is what I did to fix:
#1)Cleaned all connectors....After step #1 calculator now took keyboard input about 50% of the time, but that is it.
#2)Replaced 1k POT in 513 logiblock card with vertical fine-tune model....Now display and keys work. Also all six core registers push/pop ok....but nothing else.
#3)Went over power supply...outside specifications on ripple, but when I doubled capacitors to bring ripple in check, no changes in calculator. 🙁
#4)Static in-circuit tested ALL transistors/diodes. Short-tested caps. Fixed a bad diode on 510 card...now some math functions work only when cold.
#5)Studied card functions and their schematics for two months. Determined that the 512-card's binary math card had a problem with BCD carry funtion...re-checked components again (came up OK). I boxed the calculator up (I had Fix-Wang-Burnout!) and put in closet. Next step was to scope out the logic and find specific location which was broken. A daunting task in that I was working with no guidance and was totally on my own. Decided to wait until December-2010 to start.
#6)I stumbled on another 512 card. Cleaned it up then scoped it. Once installed the electronics unit 100% works!
#7)Trig functions process for about 6 seconds and produce wrong answer (always the same wrong answer). After several months of studying patents (has great logic flow description) and scoping/debugging I got this working. A NAND gate (4 transistor logic assembly) on the keyboard #3 BCD was wonky. I replaced transistors on the gate and 360KT keyboard was repaired and working!
Dr. Wang was truly a visionary and hopefully will be remembered by history as a major contributor to computer evolution. This calculator highlights his most amazing accomplishments (magnetic core memory (he sold patent to IBM?), logarithmic math functions, BCD digital transistorized computer architecture).
This is for sale. Expensive. Please pm me for details. Includes Wang service manuals and patent technical writeup. I have a few spare logiblock cards that I have used for doner transistors.
After much work this calculator is 100% operational. These are very rare in any condition. They are impossible to find in working condition. The scientific 360KT trip keyboard is amazing. In my 20 years following Wang calculator technology I have never seen or heard of another working 360kt.
This is my repair log:
I started with dead calculator in 10/2009.
I bought it as "works fine" off EBAY. Was ripped off...it had many issues.
This is what I did to fix:
#1)Cleaned all connectors....After step #1 calculator now took keyboard input about 50% of the time, but that is it.
#2)Replaced 1k POT in 513 logiblock card with vertical fine-tune model....Now display and keys work. Also all six core registers push/pop ok....but nothing else.
#3)Went over power supply...outside specifications on ripple, but when I doubled capacitors to bring ripple in check, no changes in calculator. 🙁
#4)Static in-circuit tested ALL transistors/diodes. Short-tested caps. Fixed a bad diode on 510 card...now some math functions work only when cold.
#5)Studied card functions and their schematics for two months. Determined that the 512-card's binary math card had a problem with BCD carry funtion...re-checked components again (came up OK). I boxed the calculator up (I had Fix-Wang-Burnout!) and put in closet. Next step was to scope out the logic and find specific location which was broken. A daunting task in that I was working with no guidance and was totally on my own. Decided to wait until December-2010 to start.
#6)I stumbled on another 512 card. Cleaned it up then scoped it. Once installed the electronics unit 100% works!
#7)Trig functions process for about 6 seconds and produce wrong answer (always the same wrong answer). After several months of studying patents (has great logic flow description) and scoping/debugging I got this working. A NAND gate (4 transistor logic assembly) on the keyboard #3 BCD was wonky. I replaced transistors on the gate and 360KT keyboard was repaired and working!
Dr. Wang was truly a visionary and hopefully will be remembered by history as a major contributor to computer evolution. This calculator highlights his most amazing accomplishments (magnetic core memory (he sold patent to IBM?), logarithmic math functions, BCD digital transistorized computer architecture).
This is for sale. Expensive. Please pm me for details. Includes Wang service manuals and patent technical writeup. I have a few spare logiblock cards that I have used for doner transistors.
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NON-ABRASIVE Cleaning and removing tarnish from silver trumpet
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I've tried car wash cleaners which work OK. But as the plastics age and are exposed to elements, the plastics fog/haze up. Cleaners dont fix that. 90% Alcohol works....for about a day and then it fogs up even worse than when you started. Ammonia-based products (windex) work OK, but that fogs up even worse after a few days. Some people have reported good luck with Ajax, but that dulls the finish...
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มุมมอง 19K13 ปีที่แล้ว
Ferret core? Like a weazle? Are you sure its not Ferrite core as "ferrous Iron"?
Thanks for the note. PS: I never once stated "Ferret" in the text. If your comment is in context to my pronunciation then I can only reply that is quite pedantic of you.
Will this work on a Bach Stradivarius 180-43S I don't want to damage the instrument.
The foil scratched the hell out of my trumpet and ended up needing to polish it manually to remove the scratches.
This is very cool! Thank you for sharing! 🥰
These have the beautiful cursive script logo on their logic boards, right? These are right up there with the Victor 1400 in coolness for me.
Thank you! Just did my teapot and it worked in all the decorative details much better the silver wipes
Will this process work if a yellow stain is in the silver plating?
I just did this with my Bach Strad and it's amazing! I got a real long piece of foil to fully wrap my trumpet and let it soak for 30 minutes. Came back and the foil was grayish-black and my trumpet was nice and shiny again. Thanks!
👏👏👏Much appreciated. Did it and had amazing results! Thank you.
Update 1/1/2023 I shut the motor down 6 months ago. Started it back up 12/31/2022. Cleaned it off and replaced NIMH battery again. The solar panel's acrylic encapsulation has discolored and started to bubble. I replaced it w/another identical panel. The wires could use a refresh also....I'll get to those next time. The carbon rod "point" is still as sharp as the day I started up motor, and glass does not have a visible indentation where point contacts it. I am quite surprised at the durability and wear properties of the carbon rod against the glass.
Does anyone have any solutions for tarnish on a non-silver brass trumpet? I'm fine with buying something like brasso, but I am a newbie and I don't want to potentially ruin it. When I google I see some people say lemon juice works, but I also see that people also use baking soda, which OP says I should not do.
Do we use boiling water, hot water or cold water
wow
All I can say is "wow!"
You sound really smart
Used this technique on a tarnished Getzen Cornet and it worked great. I do have a question: as a musician, my background in chemistry is naturally limited, but I do remember that electricity travels from positive to negative. Would this process work even better if you hooked up dry cell batteries - positive to the horn body, negative to the foil while the horn is submerged in the solution?
Not sure.....be careful though because you may end up electro-plating the aluminum with silver from the trumpet (thus removing silver!).
I may be a little late to the party, but I do have a chemistry background - with an electrochemical process like this, essentially what is happening is silver is starting off as an ion (because it's bonded to sulfur) and then being turned back into a non-charged metal without the sulfur. Aluminium is starting as a metal, and being converted to an ion, and the sulfur is moving across from the silver to the aluminium. In this case, this reaction happens spontaneously, because aluminium has a greater affinity for sulfur than silver does. You would normally only need to apply a charge to get a non-spontaneous reaction to happen, and you definitely run the risk of making a non-spontanous reaction happen instead by applying a current. Tbh, I wouldn't recommend. If you want to make this reaction faster, just make sure your water is really hot. I've got a Getzen too that's looking a little worse for wear. Excited to try this out!
I also have a Getzen trumpet that I used play in high school. Going to try this method.
That’s amazing
JUST CHECKING IN SIR. How is the motor going\coming? I would still love to have this built. I would give at least $200 for the device to be shipped (with all parts and schematics) Thank you:)
Seon, Sorry for the delay getting back to you. Thank you for the generous offer. I am not currently fabricating these for sale. Successful shipping is unlikely as any impact would alter the electromechanical geometry and which would impede operation.
do I need any foil or heavy-duty one?
Any foil should work.
wow!!!!
I have a blessing b and a J Callet i think ill try this on. Music place wanted over $100 to clean each. Yikes. But for a trumpet that cost over $1000 i dont think rubbing it to death myself is something i wanna do. I think this sounds safe
Father Damaso nga idol dahil tatay siya
WOW, thanks for the demo!!!!
Only baking soda? No salt?
I dont add salt.....it is not needed.
If I could add my 2 cents...I sell vintage silverplated flatware and use this method (which is a form of electrolysis where the tarnish is transferred to the foil). Technically baking soda IS salt, and I think dissolved salt works better. After soaking for a bit try rubbing the tarnish off with dry baking soda. I've never had the technique remove the plating, or even additional plating from a piece that already has plating damage. If you're not sure, try it on your mouthpiece first.
I’d pull the slides before emerging and rinse very well with just water afterwards. Then grease and oil everything up and put back together.
After 7 years, trumpet tarnish needs to be removed again. Great results again. Trumpet worked well for my son all through his school years.
I was nervous to do this on my Yamaha Xeno as I was afraid it would go wrong, but it was successful! I’m amazed with the results! Looks new! I recommend doing it too.
How long does the instrument have to be in the water?
Is there any way you could make this motor for someone? And if so , how much?
Have you got a 10s Lipo Configuration?
Masterpiece and Beautyful
Q3 = 2N3906 Update: Motor still going strong. I replaced the NIMH battery 11/2018. I also updated the charge circuit from simple current-limiting resistor to a zener/resistor(x2) setup which is much easier on the NIMH battery when in the charge cycle. No other issues...ready for another 5 years! Will be making an updated run of circuit boards this winter and maybe another motor&video.
@@HealerJesusIsSlavation what? The sun does not shine in Africa?
@@HealerJesusIsSlavation You should watch the video. 🙂 It it is 100% solar powered.....at night it runs off battery which is recharged during day ;-)
Great project, Are the Eagle or Gerber files available?
Will this damage trumpet or trumpet sound?
Hot damn, worked like a charm on my white side covers after the soft bags ground dirt into them. Thank you!
Interesting no friction = no parts replaced right?
Indeed. I had the battery wear out though....after over 3 years of non-stop running. Maybe I should try lithium (should last 10 years) battery? Or perhaps a supercap so some sort??
Just did this on a Jupiter XO, worked perfectly (all the tarnish around the bell is now gone). Thank you way better than using chemicals (which I had done in the past on an old instrument).
dude I cant see what q3 is
Q3 = 2N3906
Just did this today and my trumpet looks great used it on my Yamaha Xeno if anyone is curious on using it on theirs :)
How long does the instrument have to be in the water?
Will it work with a silver sonic king trombone?
If you want to know if it worked, then yes it did. It got rid of all the brown spots that even started to turn blue in some spots. Great work, thanks!
How long does the instrument have to be in the water?
@@raudel101 I leave it there for half an hour just about.
@@lystrung5437 Thank youuu
Very good.
what if there's already raw brass spots on the trumpet? what may be the effect on them?
If a silver plated trumpet is severely tarnished would repeating this process be safe?
Nice music though can i have name of song
im scared to try it on my B&S Challenger 3137 does anyone know if it works?
Yes it works on all silver non lacquer instruments, they use this method in museums to restore and polish non polishable objects. So your horn will be no problem. Make sure to use really hot water.
How do I know if my trumpet has a laquer finish (1 year old yamaha xeno)
Mitchell Hardy I have the same trumpet and I love it and it does I reccomend a silver polishing cloth don't do it will ruin the laquer
What if you trumpet has a little gold
TARS 515 is it actual gold? anyways it just won't have the tarnish taken off
Will this work on a trumpet that only has just a few little spots of tarnish? Or does the whole horn have to be tarnished?
ill say whole trumpet because if only a few spots the not really heavy tarnish will be visible
amazing so beautiful.
What is the recommended time to keep the horn submerged?
And does the amount of baking soda effect any thing? If I tried this on an old silver trombone how much do I put?
what if there is just a little tarnish? i have a trumpet that's not too bad but it has some darker spots. Will it only work if the full instrument is tarnished? I don't want to ruin my Getzen 907s Eterna Proteus...