The ki values of diodes having a different germanium content and irradiated by 20mev alpha rays were calculated by this equation as listed in table 1 and decreases with increasing germanium content. These included the 1n60 germanium diodes 1n270 germanium diodes 1n277 germanium diodes.
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Germanium is a chemical element with the symbol ge and atomic number 32.
Germanium diodes list. If there is enough voltage to a diode in reverse biased then the diode will leak reverse current. Rig up something that puts a little current thru them and measure the voltage. Table of contents page list of illustrations f oreword.
The value is different for other diode typesschottky diodes can be rated as low as 02 v germanium diodes 025 to 03 v and red or blue light emitting diodes leds can have values of 14 v and 40 v respectively. Silicon diodes can also handle more reverse voltage. 40 uses for germanium diodes inc.
Sylvania electric electronics 1740 broadway products division new york 19 first edition first printing printed in usa. Schottky germanium and ultra fast recovery types. A germanium diode typically begins to conduct electric current when voltage properly applied across the diode reaches 03 volts.
It is a lustrous hard brittle grayish white metalloid in the carbon group chemically similar to its group neighbours silicon and tinpure germanium is a semiconductor with an appearance similar to elemental silicon. Diodes such as the most common 1n34a can cost as little as 5 pence each. It takes 07 volts to create a forward bias situation in a silicon diode.
Next to the 1n34a in popularity with crystal radio set builders is the 1n60 diode. A germanium diode such as the 1n34 pictured above will typically have a forward voltage drop of just 03 volts which means they are much more efficient. Silicon diodes leak less reverse current than germanium diodes.
Standard 1n4xxx series and 1n54xx series. Depending on the diode it can handle up to hundreds of volts. Large quantity discounts available.
General purpose diodes features. Silicon diodes require more voltage to conduct current. Older germanium diodes had a larger leakage of current at a reverse voltage but now american microsemiconductor and others supply a range of improved low current leakage germanium diodes.
Uses for germanium diodes. Citation needed at higher currents the forward voltage drop of the diode increases. Like silicon germanium naturally reacts and forms complexes with oxygen in nature.
The other diodes 1n270 diode 1n277 diode can be used in crystal radio sets xtal radio sets but are not used as much as the 1n34a. For example a 5 kw resistor in series with a 5 v supply should do quite well. Germanium diodes have a lower forward voltage drop than silicon diodes.
The mark of uality. Germanium diodes are 1000 times more leaky than silicon diodes.
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