Crystal Radio Receiver Litz Coil 3 Diode Selectable and Piezo Earphone RK-7FSA

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
Pushbutton Switch Colors May Vary From Pictures
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 with a Litz Wire Ferrite Core Loopstick Coil
It 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 150pf Capacitor to shift the low frequency range-NEW Design allows you to increase the Variable Capacitor capacitance with the press of a switch. Press the latching pushbutton to increase the total circuit Capacitance by 150pf. The Capacitance 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 Litz 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 possible . Search eBay or the net to purchase a "Crystal Radio Antenna" Kit or to make your own.
.
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
When Looking thru the various Models of Crystal Radio in my eBay store, you
will see a number of Radio coil Design Variations such as Litz, Enamel, and Center Tap Coils.
I offer these Variations because many Crystal Radio Enthusiasts often prefer one type of coil design over another.
While all of the Coil Designs Perform well in the AM Medium Wave Frequencies, my cost to manufacture these coils
vary and you will see some slight Cost Differences in the selling price depending on the Model.
Search eBay or the net to Purchase or Construct a "Crystal Radio Antenna" Kit or to make your own.