Graduated Tuning Dial Crystal Radio Spiral Printed Circuit Board Coil & Earphone

Description

Newest in Crystal Radio Technology
Not Available Anywhere Else !
Now with
Matching Color Tuning Dial, Knob and Spiral PCB Coil
Tuning Dial has a Graduated Indicator Scale
Clean Uncluttered Wiring Design
Engineered Crystal Radio with Precision Spiral Pattern PCB Coil
The Spiral Printed Circuit Board is the Coil !!
This Crystal Radio
Receiver
does
not
need a battery
or power source, it is powered from from the
radio
waves using an outdoor wire antenna.
Fully Assembled Crystal Radio with 350uh Special Design Printed Circuit Board Coil
Includes Piezo Earphone
Some Electronic Parts and/or Wire Colors may vary from the photos but are always improved equivalents.
This Design allows you to change the main Coil total inductance with the press of a switch !!
Press yellow button to
reduce inductance by as much as 50%, press again for full inductance
The inductance is locked/latched and will hold until you press the pushbutton again
Designed with a Multilayer
PCB 54mm x 96mm FR-4, 1.6mm Thick
350uh Planar Spiral Multilayer P
rinted Circuit Board
(“
PCB
”)
coil
Great Radio Backup for when a Power Failure happens.
Instructions are in the Picture Gallery in JPG format with this listing,
If you are unable to view and read the images, the instructions for getting the files by PDF will be included with the radio when you receive it.
Simply Connect the Included Earphone and attach an Antenna and Ground and it is ready to use.
(Antenna and Ground Wire Not included)
A minimum of a
30-50ft long outdoor Antenna Wire is recommended.
The reason you need a good length antenna is because the more antenna you have, the more power your set will receive, and the louder it will be.
This Radio permits easy changeover when experimenting with Different Diodes, Earphones or Coils because of the threaded Knurl Nuts used in the unique design.
This is a must have for any Survivalist to keep in your Survival Kit or backpack if the power goes out and to be able to tune to a radio station.
The components can be disassembled from the platform and the base can be stained and finished to your liking.
Crystal Radio Set Kits are sometimes called Xtal Radio Kits, Crystal Diode Radios and Zero Power Radios.
Listen to radio using only the power in the radio waves
This is a must have for any Survivalist to keep in your Survival Kit or to keep at home if the power goes out and to be able to tune to a radio station.
ALSO INCLUDES A PIEZO EARPHONE with an integral 3.5mm Male Jack.
An Earphone Female Adapter Jack is already Installed to the Radio. Just need to attach an Antenna and Ground and it is ready to use.
THIS KIT IS Completely ASSEMBLED
Crystal Radio
The Components used in this Crystal Radio construction are:
1-
5"x7" Pine Base
1- Piezo Earphone and Adapter Jack
1-470uh inductor is placed across the variable capacitor terminal and ground to provide a frequency shift that may improve volume
The 470uh inductor is already installed on this Model and can also be removed easily from the Knurl Nuts.
1- High Performance Germanium Diode ( Crystal Diode Detector )
1- resistor- already installed on this Model
1- .001 Capacitor- already installed on this Model
1-
350uh Printed Circuit Board Coil
1- 60/140pf Variable Capacitor assembly with
Tuning Knob
6- Brass Thumb screw Nuts/washers and Posts for easy solderless connections to coil, diode, and earphone
1- Schematic Diagram Showing all Electrical connections (Will be emailed)
4- Rubber non-skid feet
The kits do not come with antenna or ground wire (For Earth Ground or Antenna)
If you live in a Fringe Location where AM Radio signals are poor or weak and you dont have room on your property for a 100 Foot long antenna, check out my eBay store for my
"
AM Medium Wave Crystal Radio Antenna RF Amplifier High Performance".
This amplifier Pulls in AM Radio signals like a Magnet.
Here is the link to my eBay store:
https://www.ebay.com/str/hometownsales11