How do you make an Barium Oxide Bar Magnet to use with HDR?

dustin255

dustin255

Member
Messages
216
How do you make an Barium Oxide Bar Magnet to use with HDR? I want to increase the fields. I know Steven Gibbs mentions using this to increase the field.
 
TimeFlipper

TimeFlipper

Senior Member
Messages
13,705
dustin255 said:
How do you make an Barium Oxide Bar Magnet to use with HDR? I want to increase the fields. I know Steven Gibbs mentions using this to increase the field.
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I checked Ebay for you and found one for about $16...Gibbs did say that type of magnet was not necessary and you could use a Neodymium magnet instead which is the most powerful magnet on earth, but more expensive than the Barium Oxide type.:)
 

TimeFlipper

TimeFlipper

Senior Member
Messages
13,705
dustin255 said:
Why wouldn't you use an Neodymium Electromagnet? Wouldn't that be stronger?
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Yes it is stronger and more available than the Barium Oxide variety but more expensive...And when i said, "good luck finding them", i was referring to the Barium Oxide variety :)
 
steven chiverton

steven chiverton

Senior Member
Messages
3,975
all i can get here is rare earth magnets and i think jaycar electronics may have some barrel shaped neodymium magnets ill check again soon. strange things about the rare earth magnets i thought to it may make the hdr electromagnet more stronger but i found out after a test when the watch wouldn't spin in the field , that when i remove the rare earth magnet it then spins like as if it was clamping the field before i removed the magnet and that was when i used the 240vac 50hz converter and powering the electromagnet with just 120vac. but with just the strait 240vac at 50hz its a different story
 

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