Search found 2072 matches

by jwax
Mon Jul 24, 2017 7:25 pm
Forum: General Discussion
Topic: Lightning rods...
Replies: 24
Views: 3532

Re: Lightning rods...

Not trying to catch the thousands of volts and amps in a strike, but seems the approach would be to siphon off the charge before it got large enough to make the bolt. "Collect" the charge as it is being created, and send that power to ground storage. We need a charge antenna. Maybe tuned to the 8 Hz...
by jwax
Sun Jul 23, 2017 5:09 am
Forum: General Discussion
Topic: Lightning rods...
Replies: 24
Views: 3532

Re: Lightning rods...

Gentlemen, what we need to do is develop a system whereby the electrical energy of the clouds is captured and safely transmitted to a storage device on the ground for later use.
by jwax
Mon Jul 10, 2017 5:20 am
Forum: General Discussion
Topic: Drone communication/control
Replies: 5
Views: 1278

Re: Drone communication/control

Has the drone bug bit MicroRem? :smile:
They can be addictive! Only the imagination limits what one can do with a remote camera in 3D space.
I'm amazed that a large following of droners go long distance- out of sight, like several miles! Explore your neighborhood!
by jwax
Sat Jul 01, 2017 5:32 am
Forum: General Discussion
Topic: Drone communication/control
Replies: 5
Views: 1278

Drone communication/control

Anybody playing with these techy gadgets?
My DJI Phantom 2 Vision Plus uses 5.8 GHz for flight control, while sending back video on 2.4 GHz. Fairly fancy comm network!

Next big industry will be how to disable them in flight, if they pose a threat! :shock:
by jwax
Tue May 02, 2017 8:20 am
Forum: General Discussion
Topic: About DSL
Replies: 12
Views: 2935

Re: About DSL

Any big thunderstorm/lightning nearby lately?
by jwax
Sun Feb 12, 2017 12:56 pm
Forum: General Discussion
Topic: 9 volt Duracell Procell
Replies: 6
Views: 1974

Re: 9 volt Duracell Procell

Looks like LR44's have 150 maHr rating- even less than the ProCell.
Two parallel banks of them (to make a 9 volt) would outlast the ProCell, but oh, the hassle. :razz:
by jwax
Sat Feb 11, 2017 8:03 pm
Forum: General Discussion
Topic: 9 volt Duracell Procell
Replies: 6
Views: 1974

Re: 9 volt Duracell Procell

Thanks guys-
Space is an issue in this application.
If not Duracell or Energizer, what is recommended for a better alkaline 9 volt? (Lithium disposables too expensive)
by jwax
Wed Feb 08, 2017 6:30 am
Forum: General Discussion
Topic: 9 volt Duracell Procell
Replies: 6
Views: 1974

9 volt Duracell Procell

Been a big fan of Duracell for many years, but these are a disappointment. Just don't last as long in 50 mAmp application.
Going back to Energizers!
Anybody else have a review for this cell?
by jwax
Mon Jan 23, 2017 10:04 am
Forum: General Discussion
Topic: Articles I highly enjoyed...
Replies: 2
Views: 1128

Re: Articles I highly enjoyed...

Nice collection! :)
by jwax
Thu Jan 12, 2017 11:46 am
Forum: General Discussion
Topic: 120v to 4800 v transformer
Replies: 14
Views: 3174

Re: 120v to 4800 v transformer

If you have access to a variable AC supply, ramp up the primary voltage while watching the secondary voltage to confirm the markings. Maybe a Variac? Even a lamp dimmer would give some idea of the markings veracity. Measure RMS in and RMS out.
by jwax
Sat Dec 31, 2016 4:05 pm
Forum: General Discussion
Topic: Craftsman Multimeter
Replies: 9
Views: 2063

Re: Craftsman Multimeter

Nice to hear from you again Mr. Al! I dug this old Craftsman DMM out to complement some Flukes I use regularly. Haven't used this old "Crapsman" for years. It has 4 buttons across the top: Power Range-H Beep/diode check Data-H What is Range-H for? I think Data-H holds the last (or highest?) reading....
by jwax
Wed Dec 28, 2016 1:31 pm
Forum: General Discussion
Topic: Craftsman Multimeter
Replies: 9
Views: 2063

Re: Craftsman Multimeter

Thanks but there's something wrong with that ad. It actually leads to a Klein meter. No joy.
by jwax
Tue Dec 27, 2016 4:15 pm
Forum: General Discussion
Topic: Craftsman Multimeter
Replies: 9
Views: 2063

Craftsman Multimeter

Looking for the operating manual for an old autoranging multimeter:
Craftsman Autoranging Multimeter 82028

Googled, but couldn't find it. It's maybe 15-18 years old.

TIA!