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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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. The typical load on a 1N34A diode in a crystal radio is a crystal earpiece with an impedance of 20kOhm.
As you can see from this diagram from here. Sign up or log in Sign up using Google. They are finicky enough that even slight variations will cause a failure – substituting parts 1n334a just asking for trouble.
Germanium Diode 1N34A
The 1N is made for lower frequencies and higher currents than a signal diode. I think that “a piezo buzzer” today isn’t comparable to a crystal dxtasheet.
Back when I was younger I got a crystal radio set kit which included a 1n34z Ge diode as far as I can remember, I don’t have it anymore. Look at this one: I guess it didn’t help that I tested this radio outside in -5 degrees Celsius. It also indicates that most schottky diodes aren’t really good for crystal radios.
In reponse to comment: Whether and how well it works at other audio frequencies is anybody’s guess. Here’s link to a site about crystal radios with some hints about schottky diodes: Use 1j34a proper crystal radio earphone! It all comes back to building the receiver right with all parts as specified, then you can start experimenting with buzzers as earphones or using other diodes, etc.
Germanium Diode 1N34A
It is my understanding that Ge diodes were the choice for crystal sets because their low Vf does not load the tuned circuit. It is completely possible that another part of my circuit is to blame, I just want to rule out the diode.
It may well be the diode that is causing problems. A buzzer is made to work specifically at a particular frequency. Sign up using Facebook. Would this still be a suitable replacement for a Ge diode? With a lower If, Datasheet is also lower. Email Required, but never shown. The trick lies in the combination. My biggest problem when building one as a kid was that we lived so far away from any transmitter that you pretty much had 1n34q get everything perfect and have a good antenna in order to pickup anything at all.
Home Questions Tags Users Unanswered. Sign up using Email and Password. Isn’t a crystal earpiece just a piezo buzzer?
The 1N34A will conduct 0. Also worth noting is that Vf is dependent on temperature. Try locating an actual crystal earpiece and give it a go. A piezo buzzer is meant to BUZZ at a particular frequency. They both use a piece of piezoelectric crystal to work. Datasheeet a kid, of course, meant that I never got things really good enough.
Perhaps I am misunderstanding the datasheet? Andy aka k 10