Espritmodel.com Telemetry Radio
Reply
Thread Tools
Old Mar 17, 2011, 04:51 AM
Now which way was home.....
Joined Feb 2011
115 Posts
Features:
- Compatible with our 1.3GHz receivers
- Significantly increases transmission range
- SMA male connector

That would be a "yes". Its compatible. But why not get an IBCrazy patch instead?
FPVORDIE is offline Find More Posts by FPVORDIE
Reply With Quote
Sign up now
to remove ads between posts
Old Mar 17, 2011, 07:55 AM
Registered User
Joined Sep 2010
2,403 Posts
Whats the price and advantages of IBCrazy's design and where can i buy it already premade i don't want to make it by myself...
msev is offline Find More Posts by msev
Reply With Quote
Old Mar 17, 2011, 08:20 AM
Joined Mar 2006
1,665 Posts
...
scrape is offline Find More Posts by scrape
Last edited by scrape; Jun 28, 2011 at 12:58 AM.
Reply With Quote
Old Mar 17, 2011, 10:42 AM
Registered User
Luxembourg
Joined May 2009
775 Posts
go on ibcrazys blog there is an ordering form you will have kits or allready made for a good price
iacei is offline Find More Posts by iacei
Reply With Quote
Old Mar 17, 2011, 11:24 AM
Registered User
Joined Sep 2010
2,403 Posts
So kit price means that its a DIY kit that I have to make myself?
msev is offline Find More Posts by msev
Reply With Quote
Old Mar 17, 2011, 01:31 PM
Registered User
Luxembourg
Joined May 2009
775 Posts
Exactly and they cost really less. But it's only assembly, the parts are already cut to the right dimensions
iacei is offline Find More Posts by iacei
Reply With Quote
Old Mar 17, 2011, 01:46 PM
Now which way was home.....
Joined Feb 2011
115 Posts
All you have to do is glue the wooden blocks to the plates and solder the included wire through the pre drilled holes. It takes longer for the 5min epoxy to set up then it takes for any of the rest of it.
FPVORDIE is offline Find More Posts by FPVORDIE
Reply With Quote
Old Mar 17, 2011, 07:13 PM
Flying low is expensive.
pdiddyg40's Avatar
United States, CO, Boulder
Joined Jul 2008
2,398 Posts
Anyone want to answer a dumb question? What's the difference between right hand circular polarization (RHCP) and left hand circular polarization when used in the context of IBCrazy's new cloverleaf?
pdiddyg40 is offline Find More Posts by pdiddyg40
Reply With Quote
Old Mar 17, 2011, 07:57 PM
Registered User
Daemon's Avatar
Lakewood, Colorado
Joined Aug 2002
28,202 Posts
No difference, except that Tx and Rx handedness must match, or they won't work at all together. Or are you asking how to determine the handedness for this type of
antenna? If the latter, that's described in his antenna building threads.

ian
Daemon is online now Find More Posts by Daemon
RCG Plus Member
Old Mar 17, 2011, 08:04 PM
Flying low is expensive.
pdiddyg40's Avatar
United States, CO, Boulder
Joined Jul 2008
2,398 Posts
Quote:
Originally Posted by Daemon View Post
No difference, except that Tx and Rx handedness must match, or they won't work at all together. Or are you asking how to determine the handedness for this type of
antenna? If the latter, that's described in his antenna building threads.

ian
I know that he had talked about how to make a RHCP or LHCP antenna, and how to turn one into the other, etc. I just didnt know what RHCP was. Is it the way the radio ways travel? Would the be different than LHCP?
pdiddyg40 is offline Find More Posts by pdiddyg40
Reply With Quote
Old Mar 17, 2011, 08:14 PM
Registered User
Daemon's Avatar
Lakewood, Colorado
Joined Aug 2002
28,202 Posts
There's no difference in their ability to propagate. One handedness doesn't work
better than the other, unless it happens to be paired with the opposite polarization
antenna in which case the pair doesn't work together at all. There are many ways
to describe and/or visualize what CP itself represents.
I'd refer you here, http://en.wikipedia.org/wiki/Circular_polarization

Bit of trivia. RealD 3D glasses that you use in a regular movie theater
use circularly polarized light. The movie projector projects images for both left and right eyes
onto the screen simultaneously, each side left and right circularly polarized.
The 3D glasses have left and right circularly polarized filters (unlike conventional
sunglasses which have vertical polarization). The left hand polarized light is
blocked by the right hand polarized lens, and vise versa, so each eye only
sees its own side's image. Because it's circularly polarized you can tilt
your head without a change in what each eye sees, same as CP antennas
can tilt with respect to each other and the magnitude of the signal received
doesn't change.


ian
Daemon is online now Find More Posts by Daemon
RCG Plus Member
Last edited by Daemon; Mar 17, 2011 at 08:26 PM.
Reply With Quote
Old Mar 17, 2011, 08:51 PM
Flying low is expensive.
pdiddyg40's Avatar
United States, CO, Boulder
Joined Jul 2008
2,398 Posts
Thats very interesting! Thank you for the article, I read the interesting tidbits and left out the other stuff.
pdiddyg40 is offline Find More Posts by pdiddyg40
Reply With Quote
Old Mar 17, 2011, 08:57 PM
Registered User
Daemon's Avatar
Lakewood, Colorado
Joined Aug 2002
28,202 Posts
BTW, whether light or Rf, when a CP wave is reflected, it reverses polarization.
LHCP turns into RHCP after the reflection. This is why a pair of CP antennas
are resistant to multi-path interference. The strongest multi-pathing comes
from the first order reflections off various big objects, and because
those reflections have opposite polarization, they are basically not seen at all
by the receiving antenna on the original polarization, much like how the 3d glasses
don't see the image for the other eye because it has opposite polarization.

ian
Daemon is online now Find More Posts by Daemon
RCG Plus Member
Old Mar 17, 2011, 09:10 PM
Flying low is expensive.
pdiddyg40's Avatar
United States, CO, Boulder
Joined Jul 2008
2,398 Posts
Quote:
Originally Posted by Daemon View Post
BTW, whether light or Rf, when a CP wave is reflected, it reverses polarization.
LHCP turns into RHCP after the reflection. This is why a pair of CP antennas
are resistant to multi-path interference. The strongest multi-pathing comes
from the first order reflections off various big objects, and because
those reflections have opposite polarization, they are basically not seen at all
by the receiving antenna on the original polarization, much like how the 3d glasses
don't see the image for the other eye because it has opposite polarization.

ian
The light in my brain just flicked on Wow, thats a heck of a concept! Someone must have been really smart to realize that and utilize it in an antenna. It took my this long to catch on.
pdiddyg40 is offline Find More Posts by pdiddyg40
Reply With Quote
Old Mar 20, 2011, 03:56 PM
recep
recep's Avatar
Ankara, TURKEY
Joined Sep 2005
481 Posts
Could you please help me about a confusing situation I'm experiencing. I have got two identical fox 800 tx units from bev rc and their receivers. I connect my vee antenna to one tx power it and no image on the googles until I touch the antenna once then the image comes. I connect the vee to the other tx power the system and I have the image without touching the antenna. With stock antennas everything is normal. I tried it with two receivers same thing happens with that tx and vee combination.
recep is offline Find More Posts by recep
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion Lawmate vs BOB Fox 700 Tx/rx combo which one has the 1160? iacei FPV Talk 24 Jul 22, 2010 08:49 AM
Discussion 1.2Ghz Tx Only: Where to buy a cheap one iacei FPV Talk 9 Jun 07, 2010 02:03 AM
Question esc all one, can i change to different tx/rx? Fossy313 Beginner Training Area (Aircraft-Electric) 4 Jan 30, 2010 04:07 AM
Discussion 1.2Ghz 800mw video TX/RX on Ebay for $2.98 Euro _Spud_ FPV Talk 1 May 23, 2008 12:31 PM
Are 1.2ghz Tx and Rx any good. JustFly Aerial Photography 3 Apr 22, 2005 11:46 AM