Recent content by tackyattack

Because... Gravity...?

I'm not sure. If it was lighter than air, it would float to the top. If it were heavier, it'd sink to the bottom?

So I'm curious, if you mix two parts hydrogen and one part oxygen in a bottle, how do they mix? I know that it wouldn't turn into water unless lit on fire. If the bottle was turned upside down and uncapped, would the oxygen fall out the bottom and hydrogen float to the top? Or are the two...

http://www.hobbyking.com/hobbyking/store/__7637__Turnigy_12v_2_3S_Basic_Balance_Charger.html

So I have this motorized bike I made and I'm thinking about adding gears on to it over the summer. Anyways, it got me thinking and I'm confusing myself. So say you have an engine with a two speed transmission on it. For take off, you're in the smallest (or, biggest in size actually) gear so you...

Yeah, I knew it had to be higher, but does it have to be a certain amount higher other than extra headroom? Doesn't it have to be non-linear or something like that to make harmonics? Or is the LC tank the part that makes the harmonics and the transistor just acts as a buffer?

This is sooo cool! So does the transistor's capable running speed have to be at an exact value, or does it just have to be capable of running around that frequency?

Wow, that is very simple! So adding more than two would cause the signal to diminish to nearly nothing. But, what if you amplified before adding into the next multiplier? Would there be a point that too much noise is introduced?

Thanks, that makes sense! I guess I should probably stick with pre-made transmitters for the VHF and beyond frequencies. It's too bad building a disposable VHF module is nearly impossible! Maybe once I have some low frequency transmitter experience under my belt I can safely move up to the...

I'm a 16 year old teen, my friends aren't exactly into that kind of hobby. The closest ham group to me is too far. Actually, I'm using an SDR as my receiver. That's why the frequency range isn't too fantastic.

I already have a setup that I put money into though. :( Would a $50 kit even be enough to receive low power signals from that far?

1.25 meters. I would use 10 meters, but my receiver can only receive between 52 - 2200 MHz.

Interesting. I do have an oscilloscope but I don't think it would be capable of reading 200 mhz signals.

A ready-made transmitter would be the right choice, but one good enough for my purposes will be too expensive. I am going to attach the transmitter to a high altitude balloon so I was hoping to make it myself. I won't be getting the transmitter back so a disposable module is what I am trying to...

I did some more searching and I found exactly what I need! https://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_1700720_-1 Thanks for your help!