Zinc Negative Resistance 80 Meter CW Transmitter.

[AtheistsReignSupreme]

very nice.. thanks for the video. like your website too.. was looking at doing your 'easy ten' transmitter do you know if it would work in the uk?

[jsmythib]

Stone Knives and Bear Skins! Excellent creation.

[boxa888]

IS there any way to make the zinc strip into the crystal ocillator at all? that would be impressive! just 2 pieces of burned metal and have a radio transmitter lol. great work, really like the mini oscilloscopes

[KB3UYT]

I would love to make my copy of this project work. All I'm getting right now are clicks / interference when I use the key, no tone per se. I'm guessing either my zinc strip is no good, or my crystal is blown. (I bought it at a hamfest, but...) How could I check if my crystal is OK?  Any suggestions?

[zoltan6561]

can I use 10K Slide variable resistor instead of 25K pot and call phone charger instead of batteries???

[Umbra33]

Really amazing, what is the RF power output of this oscillator? Must be at least a hundred miliwatts or so to travel 5 miles.

[antienjigglement]

and with a carbon microphone, we have AM?

[reese1011]

I want to try this myself

[morpher44]

nicely made video

[prototype9000]

the zinc oxide from heating it pretty much makes a semi conductor dosent it if so then you have a homemade transistor from the looks of it

[Isochest]

So this kind of arrangement could be practical for a cross town QSO....Nice one:-))))

[bythepointer]

Hi,

Very nice.

The use of crystal as resonator instead LC circuit makes the oscillator very stable.

Did you measure output power and harmonics ?

[arjansomakiwi]

and what metal do you heat to get the zinc negative resistance oscillator? I've heard that you use galvanized steel. Is this true, because we have lots and lots laying around our house. By the way, you're a genious.

[DarkTemp0]

galvanized sheet metal :)

It also works with iron pyrite

[thunderhorsedave]

i like this alot great stuff.

Now i have a counter part to my razor blade crystal radio hehe.

[reformedman]

seems like pitch is not stabilized. A regulating capacitor might help to give you a solid 'long' instead of the dropping swoop that's happening.

[nylesteiner]

Considering the very crude, basic and unusual processes used to build this transmitter, the pitch stability is extremely good.

[reformedman]

Absolutely agreed!

It's a great experiment, and good result, I am only referring to helpful positive critique.

It's great as it is, but only if there were a way to make it better, that would be the only thing I would add is to make the pitch steady.

Great job on the experiment regardless.

[sz42781]

given the proper voltage what is the potential range

[sz42781]

This is great! could I use say a 28.060 MHz

crystal for 10 meter? and where did u get the zinc from????

[hboy007]

zinc nr xtal osc. ? hehe :D

[clerlic]

I bet with addition of microphone and 1 amplifying transistor for it, you can transmit voice and stuff.

[nylesteiner]

You are right.  Check out the video "Radio Transmitter Made Out Of Junk" This guy made an identical circuit broadcast music to a receiver.