Search found 315 matches

by Rex Allers
Sun Mar 22, 2020 8:31 am
Forum: Philo T Farnsworth Archive
Topic: Finding The Trailhead
Replies: 4
Views: 477

Re: Finding The Trailhead

Thanks Richard. Excellent and informed details, as usual.
by Rex Allers
Sun Mar 22, 2020 4:44 am
Forum: Philo T Farnsworth Archive
Topic: Finding The Trailhead
Replies: 4
Views: 477

Re: Finding The Trailhead

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?
by Rex Allers
Sat Mar 21, 2020 10:51 pm
Forum: Announcements and Site Administration Topics
Topic: Coronavirus pandemic
Replies: 55
Views: 2682

Re: Coronavirus pandemic

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 ...
by Rex Allers
Wed Mar 18, 2020 12:26 am
Forum: Images du Jour
Topic: Reverse engineering a big old smoke detector
Replies: 8
Views: 723

Re: Reverse engineering a big old smoke detector

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.
by Rex Allers
Tue Mar 17, 2020 8:55 pm
Forum: Images du Jour
Topic: Reverse engineering a big old smoke detector
Replies: 8
Views: 723

Re: Reverse engineering a big old smoke detector

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...
by Rex Allers
Tue Mar 17, 2020 10:10 am
Forum: Vacuum Technology (& FAQs)
Topic: Beware of shipping costs!!
Replies: 8
Views: 512

Re: Beware of shipping costs!!

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.
by Rex Allers
Tue Mar 17, 2020 9:54 am
Forum: Announcements and Site Administration Topics
Topic: Coronavirus pandemic
Replies: 55
Views: 2682

Re: Coronavirus pandemic

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...
by Rex Allers
Mon Mar 16, 2020 5:33 am
Forum: Images du Jour
Topic: Reverse engineering a big old smoke detector
Replies: 8
Views: 723

Re: Reverse engineering a big old smoke detector

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...
by Rex Allers
Sat Mar 14, 2020 10:50 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Mark III Advanced Pressure Control / Deuterium Generation from D2O / Metal Hydride Storage
Replies: 19
Views: 1232

Re: Mark III Advanced Pressure Control / Deuterium Generation from D2O / Metal Hydride Storage

Great stuff Andrew. Thanks for taking it all the way to fusion and sharing the results.

Good info (with resources not available to many) on what is inside too.
You said, "one of the used metal hydride cartidges that would no longer take a charge."

Any idea why it wouldn't take a charge?
by Rex Allers
Tue Mar 10, 2020 9:07 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Thought Experiment Regarding Breakeven
Replies: 11
Views: 700

Re: Thought Experiment Regarding Breakeven

Simey I'm going to break the flow for a second. Looks like you joined the forum back in 2012 but never posted until now. Is that right? I guess you are grandfathered in but rules for the forum changed in last few years requiring real names. I used to be rexa but changed to full name after the forum ...