Search found 20 matches

by vmike
Thu Mar 27, 2014 9:47 am
Forum: Analog
Topic: Making neons conduct with 0 volts DC
Replies: 3
Views: 8644

Re: Making neons conduct with 0 volts DC

I experimented making lightening and radiation detectors with various neon bulbs several years ago. I biased the bulbs to just below the strike voltage, using them essentially as "miller effect" detectors. Worked.

mike
by vmike
Fri Mar 07, 2014 9:34 am
Forum: Announce yourself
Topic: Hello From Wichita, KS
Replies: 2
Views: 2869

Re: Hello From Wichita, KS

welcome Doc Joe. I live a couple hours south of you in Oklahoma. It might be nice to meet sometime. I have many interests and lots of stuff, which I tend to share freely with other experimenters. There are some pictures of some of my early fusion experiments on the fusor forum, or you can friend me ...
by vmike
Thu Sep 26, 2013 8:38 am
Forum: Formulas and data constants
Topic: reactance slide rule
Replies: 3
Views: 7718

Re: reactance slide rule

That is a twin to the one I have in my desk drawer. It and around 19 other sliding nomagraphs have been my constant companions throughout my career.

mike
by vmike
Wed Aug 22, 2012 9:00 am
Forum: Theories and speculations
Topic: Papp engine demonstration.
Replies: 7
Views: 13629

Re: Papp engine demonstration.

This video does a better job on the explanation and you can see the pieces a little better.
http://www.youtube.com/watch?v=_zWJNyoF ... re=related
I've read about this for years, but never built one to see what it's doing past the expansion/contraction of the inert gas.

mike
by vmike
Thu Jan 19, 2012 9:27 am
Forum: Eye Candy
Topic: Messy bench
Replies: 8
Views: 7613

Re: Messy bench

It's kind of funny the comments people make about "old test equipment." Especially the kids I work with. My retort is "Test equipment will always do the job it was designed to do." Besides, much of that old stuff wasn't old when I acquired it.

I generally don't pile my projects up, I push them ...
by vmike
Wed Jan 18, 2012 9:32 am
Forum: Eye Candy
Topic: Messy bench
Replies: 8
Views: 7613

Re: Messy bench

I want to enter too! Here's five of my work spaces.
MVC-012S.JPG
Garage bench east.
MVC-015S.JPG
Garage bench north.
MVC-023S.JPG
Ham station.
MVC-024S.JPG
Electronics bench
MVC-025S.JPG
Audio bench, littered with robots.

I didn't want you to win hands down without a little competition.
by vmike
Tue Sep 06, 2011 9:55 am
Forum: Announce yourself
Topic: Hello from Earth. George Dowell "Geo"
Replies: 18
Views: 12684

Re: Hello from Earth. George Dowell "Geo"

Cool Stuff Geo! I see your name frequently on the reflector lists I subscribe to. Glad to meet you!

mike
by vmike
Tue Aug 30, 2011 8:20 am
Forum: RF
Topic: RF driver for drift-tube accelerator
Replies: 3
Views: 8383

Re: RF driver for drift-tube accelerator

Seems like you'd be better off in the long run to run a balanced output rather than to ground one drift tube. The matching is no more trouble than matching to a coax and you will have less loss due to heating in the transfer cabling. The termination impedance of your drift tubes will doubtless be ...
by vmike
Fri Jun 10, 2011 8:48 am
Forum: Eye Candy
Topic: Carl G's fusor and team
Replies: 6
Views: 5680

Re: Carl G's fusor and team

That's good stuff! Carl does a reasonable job of conveying science to a journalist as well. Kudos to Carl, keep the faith brother. My only question, (warning! warped humor) and this because I'm tall. Why'd you put the controls down next to the floor!

mike
by vmike
Wed Mar 23, 2011 8:21 am
Forum: Legacy (Tubes!)
Topic: Tube circuit design as art
Replies: 6
Views: 17041

Re: Tube circuit design as art

I have never seen a 6KD6 amplifier so they truel7y may be better. The amps I worked on in the middle 70s were the commercially made CB amps, marketed of course as "ham" amps. They were built as cheaply as possible and sold for more than they were worth. I have ham transceivers that use sweep tubes ...