Cheap video transmitters and recievers for home use

[Martin Polach]

Hi,

I am looking for cheap temporary solution for transmitting video signal from stabilizer to director's monitor. I found these cheap transmitters from Hong Kong that look to be 12V, but are aimed for transmiting TV signal from one room to second. Since I don't understand transmitters much, could anyone please explain me if these could be used for monitoring the signal to director's monitor and what are disadvantages of these transmitters against more expensive ones?

If you know any other cheap solutions, please let me know. 2.4 GHz is the only public frequency in my country.

Thanks for your suggestions,
Martin

For example of those Hong Kong recievers noted, please visit this link:
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=7579979009

[Trevor Crump]

Hi Martin, those 2.4 transmitters work quite well, for directors viewing. Do NOT use them for remote recording they are not good enough for that.

[Wing Gee]

I plan on getting a 1watt and 5 watt one. I'm going to put the 5 watt one on the sled and the 1 watt one will be for static shots for directors viewing. the foot print of the transmitter is pretty small.

[Trevor Crump]

I have one of these transmitters and plan on building it into the top stage on my new rig. they work OK and transmit over a fair distance but they are subject to flashes on the screen (directors end) when used mobile. I have not had a director complain yet but I have recorder the picture that the director has been watching and it was a little embarrasing.

I dont know if there is any way of making the signal more stable, I had considered using 2 on diferent freq and combining the result sort of like twin divercity.

[Ed Liew]

hi trevor,
have you try the 1.2 one? i've tried one and the result is better in term of stability compare to the 2.4 one. less video signal breaking when on the move but instead the visual become black and white once a while. it feel much more comfortable for anyone viewing the visual at the receiving end especially working in dark places as it tend to have less "flashes". just my observation.

[Trevor Crump]

Hi Ed, I have not seen the 1.2 gig ones, but that sounds like a good idea, maybe both and be able to use whichever is best on the day.

Got any links to the 1.2 trans?

Trevor

[Jerome Cloninger]

I used a wireless A/V Tx a few times for weddings of showing the dancing, cake cutting, etc. onto an LCD projector and screen.  I used a 2.4ghz system and you get several dropouts and that high frequency doesn't penetrate people very well if in a crowded room.  I found a 900mhz one that works very good.  Goes through objects better.... plus, 2.4ghz band is highly used nowdays with wifi gadgets, equipment and the like.

To see the 900mhz one, go here: http://www.microcameras.com/900_video_transmitters.htm

Good luck!

[Trevor Crump]

Thanks Jerome, the link was great, will give it a try.

[Michael Thonfors]

Annyone tried building a vhf/uhf transmiter?  then you could use a standard mini-tv as reciver.  Ok it's maybe not legal everywhere. but with low power i think it might work well.. Works on low frequencies so it penetrates people and stuff.

[Jerome Cloninger]

I bought the 100mw and it works great for what I use for.... about 150' or so.  From what I researched, almost all of them (these cheaper ones) will have alot of "reflections" if used in big indoor metal buildings...  So using a higher powered one might not be better as higher power will yield more reflections.  confusing???  Also, high gain antennae doesn't mean much, you could be bringing in more noise, so be careful there.

The other post.... the low power UHF, I'd like to get ahold of one to try out.  I hear these work even better, but yes, you definitely have to be very careful due to the power, don't want your neighbor picking up what you're shooting and complain.  Anyways, I heard they make those UHF ones with special receiver that is an "encrypted" signal...  Till I find something better for the price, I'll use my trusty 900mhz.

Have fun guys!

[Michael Thonfors]

i found some smal chematics on a tv transmitter on the 62.25 MHz band..  should reach 100 meters it says.   i'll try building one of those see how it works.

Here in sweden the analog tv transmissions will end in a couple of months and everything are going to be transmitted digitaly. This is good. Becaouse noone are going to bother if i transmit some old analog stuff