1N34A Datasheet, 1N34A Germanium Diode Datasheet, buy 1N34A Diode. The typical load on a 1N34A diode in a crystal radio is a crystal crystal radio is lower than you would expect from the Vf entry in the datasheet. 1N34A Germanium Diode, Package: DO Can be used in many AM, FM and TV-IF applications, replacing point contact devices.. Applications. TV audio.
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The trick lies in the combination. I wanted to build one again recently and all I had a was a Schottky diode with a Vf of around 0.
Germanium Diode 1N34A
The 1N is made for lower frequencies and higher currents than a signal diode. Try locating an actual crystal earpiece and datssheet it a go.
Once you have a working receiver, you can try using the piezo buzzer and see what it does and how it changes things – but that is an experiment for AFTER you have a working receiver. My biggest problem when building one as a kid was that we lived so far away from any transmitter that you pretty much had to get everything datashete and have a good antenna in order to pickup anything at all.
1N34A Datasheet(PDF) – Central Semiconductor Corp
But at mA it looks like it conducts 0. Sign up or log in Sign up using Google. Being a kid, of course, meant that I never got things really good enough. With a lower If, Vf is also lower. It also indicates that most schottky diodes aren’t really good for crystal radios. How did I miss that? You need a low Vf because of the modulation scheme, not to avoid loading the tuning circuit.
Email Required, but never shown. Thanks again for your replies. Thank you for your answer and the clarification about why I need a low Vf and crystal earpiece. A buzzer is made to work specifically at a particular frequency.
1N34A Datasheet pdf – Point Contact Germanium Diode – Honey Technology
I guess it didn’t help that I tested this radio outside in -5 degrees Celsius. From my own experience in building crystal radios, you would be well advised to build the first one using exactly the parts recommended and exactly the schematic of someone who has built one successfully. Andy aka k 10 Another thing to keep in mind is that they don’t have fanstatic range.
Here’s link to a site about crystal radios with some hints about schottky diodes: If not, I hath been lead astray by this link and videos. Sign up using Email and Password.
1N34A – 1N34A Germanium Diode Datasheet
1n344a piezo buzzer is meant to BUZZ at a particular frequency. The 1N34A will conduct 0. Interesting you mention temperature. The answer lies in a combination of things.
The typical load on a 1N34A diode in a crystal radio is a crystal earpiece with an impedance of 20kOhm.
They both use a piece of piezoelectric crystal to work. The 1N34A conducts much smaller currents with a lower Vf. How well it will do anything else is anybody’s guess. Home Questions Tags Users Unanswered. In reponse to comment: It lists Vf as 1V at 5mA.
MichaelK 4 Post as a guest Name. Also worth noting is that Vf is dependent on temperature. You need the crystal earphone to avoid loading the tuning circuit and to keep the Vf low enough for the diode to demodulate the signal.