Crystal Radio Receiver Ferrite Coil Diode Selectable and Piezo Earphone RK-7FSFA

Description

Assembled Crystal Radio Receiver with Selectable 3 Diode and Piezo Earphone
This Crystal Radio is Compeletely Assembled
(Antenna and Ground Wire are not Included)
Knob designs may vary from picture, but are always improved equivalents
Crystal Radio is a great fun for both beginners and expert
enthusiasts
alike
3 Diodes that are Jumper Selectable
Includes Piezo Earphone
Alligator Clips included to connect to your Antenna and Ground (Antenna and Ground Wire are not included)
This Model is designed using a Ferrite Rod and Precision Wound Single Layer of Polyester/
Polyamideimide
small gauge Insulated
Magnet Wire
The High I
nductance
coil performs as good or better than a equivalent Litz coil
Ferrite Rod Measures 50mm x 8mm
Board measures
(3-3/8″ X 5-1/8″)
and is great for beginners, Survivalists or Advanced Enthusiasts
Features:
1) Large Size Professionally Manufactured Printed Circuit Board (
3-3/8″ X 5-1/8″)
2) Integral Audio Jack for earphone or connect your own earphone or headset to the metal post screws next to where it says earphone
3) The instructions for getting the Schematic, Operation and Troubleshooting files electronically by email will be included with the radio when you receive the kit in the mail
4) Switch enabled a 470uh inductor-NEW Design allows you to change the main Coil total inductance with the press of a switch. Press the latching pushbutton 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
5) Non Skid Feet and easy to connect Antenna and Ground terminals using the included Alligator clips.
6) Ferrite Core Magnet Wire Loopstick Antenna Coil
7) Piezo Earphone included
8) Alligator Clips included to connect to your Antenna and Ground (Antenna and Ground Wire are not included)
9)
Included Earphone can be easily
connected by using the installed jack or solder your earphone to the solder pads or by connecting to the screw posts
Selectable from 3 Diodes that Can be selected Individually
Selectable Diode feature lets you test and compare the signal quality or Audio Level for up to three user selectable diodes by simply moving the included jumper to positions 1, 2, or 3 as marked on the PC Board
Select from any of the 3 Germanium Diode's- D311 (Black), BAT85 Schottky (Smallest Diode), European 1N34A (Red Band)-Not all the diodes will perform equally depending on the signal strength in your area.
Simply Connect the Included Earphone and attach and your own Antenna and Ground Wire 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 best configuration for a crystal radio antenna is to run the wire horizontally between two electrically insulated supports as high off the ground as you can get them
.
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.
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