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You get a quantity of 5!!

Original Historic Crystal Radio Receiver Germanium 

Real Glass Sensisitive Detector Diode

 GENUINE AND ORIGINAL! Has Maximum AM RF Sensitivity

Historic!   Iconic!  Could Be from the 1920's ? 

 I Guarantee These are Historic STOCK But NEW and UNUSED!

Get the Original Historic STOCK Crystal Radio Diode HERE!  

High Quality Germanium for lowest P|N Junction Voltage Breakdown

Very Sensitive for Maximum RF Detection, for use in Low voltage and Low current (signal) applications only.

This is the Cadillac of Crystal Radio Diodes!

A Simple Crystal Radio Schematic and Building Guide Sheet will be included !

Guaranteed Operational - Historic but Unused Condition -

ALL ARE Tested Good before Shipping! 

Guaranteed Germanium as Voltage Drop is ~ .3 Volts   (silicon is ~.7 volts)  

No Markings- You can determine Polarity with your Ohm Meter or Try it Both Ways in your Crystal Radio for maximum Loudness (best)

You Cannot buy a more RF Sensitive Crystal Radio Detector Rectifier Diode!

Measures 2 1/4 " inches long lead end to lead end, see Picture On The USA Cent for Size Reference 

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Crystal Radio Keywords Rare Triple Crystal Detector SE 183-A Lowenstein Radio Co. Brooklyn NY. 1917  Little Gem Crystal Radio & Headphones US.Co. INC. Crystal Detector with Tube Valve Wireless Set Radio Receiver 1923 Marconi Era 1910s Crystal Radio Army Signal Corps DeForest BC-14A Wireless Telegraphy Spark

Navy Type R-21 Loose Coupler by Signal Electric Mfg. Co. circa 1917-1920 Signal Electric Mfg. Co. Menominee, Michigan. 1923 Martian Big 4 Radio * Iconic Crystal Set * Newark NJ   Kenmac Radio Ltd Novelty Crystal Set Wireless Receiver The Listener by E.R.Fone 1920 NESCO Type B Radio * National Electrical Supply Co * Washington DC Brown Crystal amplifier c 1926, Double electromechanical amplifier