Can someone identify this thing?

[giantkiller]

A bias field.

Ok, thank you for your quick response!

I am not shure if i put this in the right forum but i do think this i connected somehow to the TPU or Leedskalnins flywheel. My research have let me to think that Ed's flywheel works like the TPU.

As in the picture we can se that the ferrite is moved (to the right) and i think another magnet is inserted at the ferrits left end. What could this be for?

/Tommy

[Yucca]

hi 3.14, where did the photo come from?

[the_big_m_in_ok]

looks like a radio...

Yeah, I'd say so, too.  Single sided printed circuit board(?) that might be part of an AM/FM radio.  Covered in dust.

Yucca said:

...where did the photo come from?

I agree.  Was there something you wanted to do with it?  The ferrite coil might be useful if it's continuity was complete.

--Lee

[szaxx]

Hi
Id agree that this is an old AM FM radio board and it looks like the long wave portion of the ferrite rod is missing. The clear bit in the piccy is a poly-varicon or tuner. There may be off the piccy a couple of small transformers probably green and red tape on them. These were very common in the seventies  (the pocket tranny) today that saying has a very different meaning. I occasionally had these devices come into the repair bay (sentimental reasons) they can be tuned up a little and the vhf part was easily converted to receive aircraft band at that time (UK).

Thanks Steve.

[BEP]

Ceramic magnets were sometimes added to increase the Q of air or ferrous cored coils. I've only seen this done on filter chokes. Don't recall seeing done for frequencies above ultrasonic.