Big magnets bulk eraser.

[NxB]

I want to make a tape bulk eraser. Would a ferrite core wrapped in wire do it? Can I just put AC to it with maybe a fuse and switch? Would a DC power source be better?

[NxB]

Re: Big magnets bulk eraser.

No suggestions on the gauge of magnet wire I should use?

[KeriJane]

Re: Big magnets bulk eraser.

Hi NxB

Couldn't you just acquire an old Radio Shack VHS Bulk Tape Eraser?

They would eventually get the job done, though VHS tapes took awhile.

I tried using mine on Audio tape for erasing before re-recording.

Even on Cassette Tapes it would take awhile to get it all. It would pick the tape right up off the table and buzz. You had to move it around to get the inner part of the wound-up tape.

That thing was heavy and got warm, too.
It had no external evidence of having a transformer.

I have no idea what kind or how much magnet wire was in it.

Good Luck,
Keri

[NxB]

Re: Big magnets bulk eraser.

I looked at those on ebay and thought they were too pricey. I also heard they did a poor job, especially on DV tapes. Real bulk erasers are $$$$.

I want to make one out of a c-shaped block from a hv relay and magnet wire that would plug into the wall. I'm thinking light switch to power it to kis.

I figure it would be powerful enough to erase a tape with the correct windings/gauge and would constantly alternate polarity for added effect. I just don't want to trip the breaker or electrocute myself.

[NxB]

Re: Big magnets bulk eraser.

Ok, I tried using Phone Wire and A 15v 2A power supply. It works but not well enough. I think I need the magnet wire.

[barry wilkins]

Re: Big magnets bulk eraser.

You cant use ferrite at low frequencies ,guessing you are talking about 50Hz mains.
You need to use Stanalloy ,like mains transformers .

Barry Wilkins

[larrymoencurly]

Re: Big magnets bulk eraser.

How about using an ordinary 60 Hz transformer and removing the top half of the core so the magnetic field isn't confined?

[NxB]

Re: Big magnets bulk eraser.

I managed to get a free tape eraser from someone but I guess next bet would have been using the transformer. I'm sure I could scare up some big ones.