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It may well be the diode that is causing problems. 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.

Thanks again for your replies. It also indicates that most 1n34 datasheet diodes aren’t 1n34 datasheet good for crystal radios. Perhaps I am misunderstanding the datasheet?

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Get it working right, first, though. The 1N is made for lower frequencies and higher currents than a signal diode. 1n34 datasheet a lower If, Vf is also lower. It is my understanding that Ge diodes were the choice for crystal sets because their low Vf does not load the tuned circuit.

1n34 datasheet lists Vf 13n4 1V at 5mA. A piezo buzzer is meant to BUZZ at a particular frequency.

1N34 Datasheet

The typical load on a 1N34A diode in a crystal radio is a crystal earpiece 1n34 datasheet an impedance of 20kOhm. From my own experience in building crystal radios, you would be well advised to build the first 1n34 datasheet using exactly the parts recommended and exactly the schematic of someone who has built one successfully. Thank you for your answer and the clarification about why I need a low Vf and crystal earpiece.

Questions Tags Users Badges Unanswered. It all comes back to building the receiver right with all parts as specified, then you can start experimenting with buzzers as earphones 1n34 datasheet using other diodes, etc. Another thing to keep in mind is that they don’t have fanstatic range. Look at the graph 1n34 datasheet – with uA flowing I bet the forward volt drop is probably 0. This ties back in to what I 1n34 datasheet about building the first one right with all the right parts.

They both use a piece of piezoelectric crystal to work. A buzzer is made to work specifically at a particular frequency.

But at mA it looks like it conducts 0. It may work well, it may not. Sign up using Facebook. Sign up using Email and Password. As you can 1n34 datasheet from this diagram from here, The 1N34A will conduct 0. How well it will do anything else is anybody’s guess.

Whether and how well 1n34 datasheet works at other audio frequencies is anybody’s guess.

MichaelK 2 As you can see from this diagram from here. If not, I hath been lead astray 1n34 datasheet this link and videos.

Isn’t a crystal earpiece just a piezo buzzer? The answer lies in a combination 1n34 datasheet things.

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I tested it indoors as well though and it still didn’t work so it wasn’t exclusively the temperature. You need a low Vf because of the modulation scheme, not to avoid loading the tuning circuit.

It lists Vf as 1V at 5mA It’s never this black or white: It is completely possible that another part of my circuit is to blame, I just want to rule out the diode.

Would this still be 1n34 datasheet suitable replacement for a Ge diode? Here’s link to a site about crystal radios with some hints about schottky diodes: You need the crystal earphone to avoid loading the tuning circuit and to keep the Vf low enough 1n34 datasheet the diode to 1n34 datasheet the signal.

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 dxtasheet everything perfect and have a good antenna in order to 1n34 datasheet anything at all. This site uses cookies to deliver our services and to show you relevant ads and job listings. Post as a guest Name. I heard no sound from it through a piezo buzzer pressed against my ear and figured it was maybe because of the diode, so I looked around for the datasheet for 1n34 datasheet 1N34A daatasheet read its characteristics.

The 1N34A conducts much smaller currents with a lower Vf. Being a kid, of course, meant that I never got things really good enough. 1n34 datasheet at 1n34 datasheet one: How did I miss that? Andy aka k 9 Use a proper crystal radio earphone! I think that “a piezo buzzer” today isn’t 1n34 datasheet to a crystal earpiece.

The trick lies in the combination. Sign up or log in Sign 1n34 datasheet using Google. The 1N34A will conduct 0. I guess it didn’t help that I dwtasheet this radio outside in -5 degrees Celsius.