Fusor Forums

Agreed, if it's less than 12 oz and can go first class small parcel, that is the way to do it.

Yep, I will probably spend more time on fusor development as well. Not going to any studio locations unless it's an off the air emergency that can't be handled remotely. As far as transmitter sites, by and large they are unattended these days, so I consider them safe to visit as there is no human co...

USPS still does have "parcel post" now called "USPS Retail Ground". But I believe that you have to drag the thing down to the post office to send it, something a large company isn't going to want to bother with.

LOL! Reminds me of the very first AM solid state transmitter. No protection for the output devices. The MW-1A model got the protection diodes. I suggest that you do the same.

Yes. a bidirectional tvs does eliminate the need for two devices. I would choose a breakdown value about twice the highest voltage you expect to read under normal conditions.

The 10 ohm current sample resistor is a nasty point for transients. During an arcing event, that point tries to go to a very high reverse voltage. I lost a digital meter there. After that I installed 10 K series resistor in the ungrounded side going to the DMM, then put a 10 volt TVS diode across th...

I wonder how much grief the hazmat shipping would be.

I looked at the Ebay listing. In the photos, the labels do not look correct for a flammable gas! The cylinders pictured have green label which is for non-flammable compressed gases, say neon or xenon. For hydrogen or deuterium it should be a red label with a picture of a flame.

I've had no problems with having the desiccant in line between the over/under pressure vials and the mass flow controller leading to the fusor. So I would suspect an issue with the neutron counter first, if you have already checked for leaks causing air contamination of the D2 source.

As long as it's crystal controlled so it stays on 27.12 MHz and they keep the "garbage" from the plasma within the 326 kHZ bandwidth, the FCC won't care. Diathermy machines operate in this band.