Fusor Forums

I was hoping to attend HEAS for the first time this year, but up in the air due to the COVID-19 situation.

Or at least test your link in preview before submitting the post.

I found that the graphite end cap grids can take at least 500 watts input without trouble, while 400 watts was the maximum dissipation for the "traditional" wire loop grid.

I haven't been working on the fusor because now that the weather is warm enough to work outside comfortably I have been clearing more of the brush from around the vertical amateur radio antenna and the neglected vegetable garden. I'm more serious about gardening this year. Just got done putting up a...

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...