Search found 36 matches

by ki3u
Tue Dec 20, 2022 8:11 pm
Forum: General Discussion
Topic: Repairing open transformer / coil windings
Replies: 0
Views: 64013

Repairing open transformer / coil windings

It occurred to me that a particular technique for repairing open fine magnet wire deep within coil windings may not be well known - I haven't yet seen it mentioned on the net. Maybe it's discussed out there somewhere but I haven't come across it. Recently I used this technique to fix the open primar...
by ki3u
Thu Dec 15, 2022 7:42 pm
Forum: General Discussion
Topic: Telegraph Relays
Replies: 0
Views: 43030

Telegraph Relays

Some stuff on telegraph relays, in particular restoring and bringing into excellent operating condition a 20-Ohm Pony relay dating from the late 19th century : http://ki3u.byethost3.com/Radio-PhysicsDIR/Telegraph/Telegraph%20Relay%20context/The%20Telegraph%20Relay%20within%20its%20context.html Berj ...
by ki3u
Sat May 21, 2022 7:57 am
Forum: General Discussion
Topic: A simple ballpark check of a Gaussmeter's accuracy
Replies: 1
Views: 53293

Re: A simple ballpark check of a Gaussmeter's accuracy

With today's inflation I would think yes. It is to be remembered that this instrument responds to static, or very slowly varying fields. If you want probe oscillating fields, say at 60 Hz, you will need a different instrument, for example one of the series of Trifield meters, or the Cornet Model ED8...
by ki3u
Wed May 18, 2022 10:49 am
Forum: General Discussion
Topic: Using a Satellite Finder as a WiFi Sniffer
Replies: 1
Views: 35157

Re: Using a Satellite Finder as a WiFi Sniffer

If you mean possible with every satellite finder - my guess is probably.
by ki3u
Tue Feb 22, 2022 9:48 pm
Forum: General Discussion
Topic: The 6L6 one-tube CW Transmitter
Replies: 0
Views: 45656

The 6L6 one-tube CW Transmitter

Anybody here interested in one-tube amateur radio CW transmitters ?

I've put up on my website a bunch of stuff on that :

http://ki3u.byethost3.com/Radio-Physics ... itter.html

Berj / KI3U
by ki3u
Sun Aug 08, 2021 1:41 pm
Forum: General Discussion
Topic: Gauss field shielding the Laptop computer - for health
Replies: 1
Views: 29883

Re: Gauss field shielding the Laptop computer - for health

I've added an addendum - on the Lenovo Thinkpad T540p

Berj / KI3U
by ki3u
Sat Jul 31, 2021 7:17 pm
Forum: General Discussion
Topic: Electronics into the Battle of Gettysburg
Replies: 0
Views: 58953

Electronics into the Battle of Gettysburg

I describe an electronics experiment with some witness bullets
from the Battle of Gettysburg :

http://ki3u.byethost3.com/Mysteries-and ... sburg.html

Berj / KI3U
by ki3u
Sat Feb 20, 2021 6:53 pm
Forum: General Discussion
Topic: Using a Satellite Finder as a WiFi Sniffer
Replies: 1
Views: 35157

Using a Satellite Finder as a WiFi Sniffer

It's very quick and easy to use a Satellite Finder to detect WiFI signals and more :

http://ki3u.byethost3.com/Radio-Physics ... iffer.html

Berj / KI3U
by ki3u
Wed Dec 02, 2020 12:08 pm
Forum: General Discussion
Topic: Radar Speed Gun experiments
Replies: 2
Views: 31024

Re: Radar Speed Gun experiments

I've added more experimental results, including with a BB gun.

Berj / KI3U
by ki3u
Tue Nov 10, 2020 7:34 pm
Forum: General Discussion
Topic: Radar Speed Gun experiments
Replies: 2
Views: 31024

Radar Speed Gun experiments

Anybody have any interesting ideas for experiments with radar speed guns ?

I describe a few using the Bushnell Speed Radar Gun, here :

http://ki3u.byethost3.com/Instruments_e ... 20Gun.html

Berj / KI3U