What is your opinion about that Ohto Super Promecha, they look like they also have lead rotation like the Uni Kuru Toga right? Don't know that brand to be sincere.
The Super Promecha doesn't have lead rotation. What can be controlled is the amount of lead to be exposed with each clik, and the extension of the tip (tube lead protection). About this latest feature, only the oldest "S" series as a wheel up front to pre-select a fixed amount of tip exposure. The newest doesn't have that feature.
The currently available Promecha 500P has no selectors, the Promecha 1000P has only the basic feature of rotating the grabber to expose or protect the tip, as have all the Super Promecha, and the latest 1500P has the wheel above the grabber (middle of the body) to select the amount of lead to be dispensed with each click. I find this feature useful for thin leads as 0.3 or 0.4mm. I have a Staedtler REG 925-85 that has this feature too.
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All this Promechas are made of aluminium. I don't like the 500P because it's to light weight for me, and love the 1000P because of the mass distribution towards the tip. It has a thick grabber and light body. The other Super Promecha because of the lead dispenser selector, are prone to body breakage if not cared (dropped or bent can ruin them). Though the tips of those mechanical pencil can be protected (500P excluded), and supposedly make then good for caring around or to be inside a shirt pocket without stabbing the owner, I wouldn't recommend them for that, because of all those "twit and turns" don't make them a very robust mechanical pencil.
But hey!... Someone that has a Rotring 600 should know that because of his wight, at the first fall, most likely the tip will be bent. Unless you place a foot under him to prevent a direct hit to the ground, and end up with a shoe pierced, a stabbed toe... and a 600 tip bent anyway.
A note about the lead holder you recommended for wood work: I highly subscribe the choice. First, the best option is to go for a thicker lead, or the lead will be breaking all the time. But the Staedtler model you recommend has a feature that's distinguish it from the traditional lead holders. It wont free fall the lead at a click, like the traditional lead holders does. It behaves like a mechanical pencil, exposing a millimetre of lead with each click. I have one of those but find it very fancy for wood working, for me, so I use a Rotring Tikky 1mm. But if I was a Pro, I would go for that Staedtler 925-25 2mm
EDIT: I'm thinking now that the Promecha 500P 0.9mm could be an option for this also.
Mitsubishi Kurutoga series have automatic tip sharpening.
Kuru(くるくる)=rotate
Toga(とがる)=sharpen itself
What is your opinion about that Ohto Super Promecha, they look like they also have lead rotation like the Uni Kuru Toga right?
I think this setup has been used for some kind of energy /pulse height spectroscopy, likely gamma spectroscopy.
Super high quality amplifiers - AND A VARIABLE 0-3 KV DC PSU - and a dual 0-1000V!
Unfortunately no ADC or multichannel analyzer. Oh well. I'm happy as a pig in mud!
I think this setup has been used for some kind of energy /pulse height spectroscopy, likely gamma spectroscopy.
Super high quality amplifiers - AND A VARIABLE 0-3 KV DC PSU - and a dual 0-1000V!
Unfortunately no ADC or multichannel analyzer. Oh well. I'm happy as a pig in mud!Don't be sad, I've seen vintage multichannel analyzers - they are a large box, with inferior performance to something you can whip up today using off the shelf part. I can't find it at the moment, but I seem to remember someone did an MCA using a sound card. You can also in theory use a scope with a height histogram (such as MDO3000).
Is that the unit with a faulty 1v range? If so there is a thread on here about units with the same fault.
I looked at it but decided I don’t need it. It might be worthwhile adding your repair to that thread to update it for future users
The molded carry case has a lot of internal structures intended to hold just this grinder, cord and accessories. Which make the case useless for anything else. I never use them, and in the past have always thrown out the cases immediately, as they are a waste of space.
Not particularly exciting, but found in an unusual place: a housewares thrift store. When was the last time you found a Weston milliammeter in with the credenzas and hassocks?
And yes, it works - I tested it with my HP calibrator.
Not particularly exciting, but found in an unusual place: a housewares thrift store. When was the last time you found a Weston milliammeter in with the credenzas and hassocks?
And yes, it works - I tested it with my HP calibrator.
They may not be exciting, but I still like old panel meters. I grab any I come across that aren't exorbitantly expensive. Nice find.
Bought a few things this morning, this is one of them. Seemed like a good deal on sale for 31% off.
https://www.newegg.com/western-digital-blue-1tb/p/N82E16820250088
Picked up a Hewlett Packard 6612C System DC Power Supply from eBay for a very good price (delivered to Australia). Cleaned up very nicely, display is a bit dim. Being able to source and sink, I am going to use it for battery charge/discharge using SCPI command scripts in Python. Did a voltage cal and it is bang on, need to take it to work for a current cal.