Fusor Forums

I'm not an expert but I did a little looking at documents and your original post doesn't make sense to me. The EXDC doesn't seem to be a turbo pump but rather a control module that attaches directly to one of several ETX... turbo pumps. If you have an EXDC mounted on the side of an ETX turbo, it loo...

Your work on this grid is really good, I congratulate you. I'm thinking, though, that you seem to have a small cylindrical chamber. Maybe a cylindrical grid like one of Doug Coulter's designs might be appropriate to also try. Here's one I made. grid example.jpg Needs a lathe to make, though. End pie...

Thanks Richard. Excellent and informed details, as usual.

Richard,
Your post starts with PTFA and continues to use that (acronym?). In this thread I have not found a definition.

From context it seems to be some organization or group. For the record here, what exactly is PTFA?

Not sure what to make of Richard's post. To me it came off as, "Don't worry, be happy". Panic certainly won't help but this one is not something to be taken lightly. Here's an interview I found where someone infected but without symptoms easily passed on the virus to friends, probably by only being ...

Ah, I'm with you now. It hadn't registered with me that you had an F5B and it was a different design.

The pics you shared are great, especially with the blue glow of where the alpha is.

Thanks for sharing that.

A bit of follow-up. I connected with Geo and he hasn't actually had any direct experience with these old smoke detectors. So I guess what I got from him was second hand. On Prutchi's page that I shared a link to, he did have some reference in a link near the end of his page but that site is now gone...

Yes, LDS has lots of vacuum parts and their prices are good...
but their shipping has always been pretty high.

Not sure if shipping is part of their profit structure. If not, they should look into better options.

Postcard from the Bay: I am a member of the following: -- As of tonight, all the population of counties surrounding the SF Bay are required by law to "Shelter In Place" for three weeks. Approx 6.7 million people. Monday morning: Before the above decree, I needed to get my car smog checked to renew m...

David Prutchi, who has created and shared on the internet and in a book, many physics experiments with custom built apparatus, was the source where I learned about these old smoke detectors. I thought the page he made might have been taken down but seems not. Here it is: http://www.diyphysics.com/20...