New
!
These are a series of sound amplifiers
for radio called
"Sound Intensifiers"
"Microphonic Relays"
or
"Telephone Relays"
Very interesting articles
Bucher Articles
Page 1
Page
2 Page 3
Hutchenson Article
Page 1
Brown Article
Page 1 Page
2 Page 3 Page
4 Page 5
Page 6 Page
7 Page 8 Page
9 Page 10
Page 11
Page
12 Page 13 Page
14
Zenneck Article
Page 1
Page
2 Page 3
Donated by Brian Butler
added 8 Feb 04
New !
Amplifier Fits On Headphone
JPG Files
Page 1
New !
How To Design
Your Own RF Coils
JPG Files
Page 1
Page
2
New !
Two-Way Five-Meter Phone
Built in Tool Box
JPG Files
Page 1
Page
2 Page 3
Page 4
Informational article only
May or may not be legal to build and use now
New !
A Desk Cabinet For
Radio Apparatus
JPG Files
Page 1
Page
2
Build a
Stirling Hot
Air Engine
From Tin Cans!!!
Click
Here
|
