rajul

My Feedback: (58)

I saw xtals for these 72MHz frequencies advertised in ripmax.com:

1) Brown 72.080
2) Blue 72.160
3) Red 72.240
4) Violet 72.320
5) Orange 72.400
6) Yellow 72.960
7) Green 72.640

Are these European legal frequencies ? There's a 10khz gap between them and the legal frequencies in the USA. Is there any possibility of interference, assuming a good receiver is used ?

Thanks...........

Steve Lewin

Have a look at http://www.bmfa.org/JRCUC/internat.html if you want to know what frequencies are permitted in various countries. 72MHz isn't legal at all in most of Europe but 72.080 and 72.240 seem to be allowed in Italy.

Steve

rc bugman

My Feedback: (30)

In Italy, most of 72 mhz is military.

Elson

rajul

My Feedback: (58)

Thanks for the link and feedback guys !

Elson, is that a net mounted on the plane in the avatar to collect airborne species for your research ?

rc bugman

My Feedback: (30)

Yes, the net is an insect net. The photo is of an old prototype. We have evolved since then. I study the long-ranged movement of economic insects and significant plant diseases which use the storm systems to move hundreds of miles in a single nite.

Elson

rajul

My Feedback: (58)

Cool ! Does the prop (I suppose you fly electric to avoid fuel contamination) cause any physical damage to your samples ?

rc bugman

My Feedback: (30)

Electric doesn't cut it. I use 3W power. The propeller is present in so little of the column of air sampled by the net, that damage to insects or fungal spores is not detected.

The airplanes are similar to the idea of the tugboats who move large ships to dock. Way over powered to drag a very draggy device through the air. Deployed insect nets we use generate between 3.5 and 8 lbs of drag depending on size. It takes a lot of engine to overcome this drag and remain flying.

Elson

JohnBuckner

My Feedback: (1)

Interesting, thank you Elson. I to have wondered about your avitar.

John

JohnMac

I suspect this is a typo. Those are 27mHz frequencies I believe
Regards,

John

Steve Lewin

I suspect you are wrong. They are nothing like the old 27MHz colour frequencies (e.g. Brown was 26.995, Green was 27.195). However as 72MHz frequencies they are known to be legal in several countries.

Steve

rajul

My Feedback: (58)

Hi Steve, got a message from ripmax that they don't have stock of these frequencies. Any idea of anybody in UK or Europe that still carry these Futaba xtals ? Thx...........

Jim C.

dont quote me but i believe that the legal freq's @least in germany are 35mhz......

Ladyflyer

My Feedback: (2)

Those are the OLD ,no longer legal in the US frequencies .
These are some of the very crystals the FCC and AMA were determined to keep OUT of the RC transmitters

The colors were flown on the antenna along with a white ribbon to denote which of the 72 MHz channels the TX was operating on.