Recent content by msbe

Thanks, i'll have to look into this. Are there any estimates of how large the amplification can be made? I'm curious since it would seem that with say, additional rare Earth dipole magnets and a small enough hole you could produce very large static field strengths - perhaps on par or larger...

[credit to wikipedia] So it would appear that the type 1 meissner effect allows for the localized increase of magnetic flux density (as the displaced field must go somewhere, the B field is somewhat larger at the surfaces of the superconductor then elsewhere, and in fact is a higher value...

EMC / Shielding Telecom.. communications methods, especially digital since they will probably be looking at things like 128/256 QAM in the future

Yeah that's the problem haha, VHF is in the region of pain where 1/4wave is pretty damn long, and implementing on a PCB requires some interesting trace routing

Single frequency. Ok thanks for that, yeah thinking about it now seems obvious the impedence will drop just like resistors in parallel. If your input is 50ohm and say N=4, i wonder if you could match 3 channels with 200ohm, so input impedence would be 200/4= 50ohm. Series idea is a thought...

My thinking is you would be better off if you didn't try to capture the actual power electrically, but allow resistive or other losses to transform it to heat. if temperature was high enough you could produce steam.

If i wanted to make a 1:N coaxial RF switch (say ~100MHz, nothing too high), could you simply route N traces in a star pattern on a PCB and implement a mechanical switch to either connect to your measurement point, or terminate in the characteristic impedance (say 50 Ohm). I'm getting thrown...

I believe it's actually possible to buy YBCO (Tc ~= 90K) and then buy liquid nitrogen or buidl your own liquid nitrogen generator for ~$500

Are you guys purchasing ferrofluid or synthesizing it yourselves?