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Model Forum / Radio Controlled / Air Models / November 20082.4GHz Question
The BMFA recommends using a black peg on 2.4GHz Tx aerial. Does anyone really know what effect this has on the efficiency of the Tx aerial? Given the short wavelength I would have thought the coil spring of a peg might act as a choke. sea bee > The BMFA recommends using a black peg on 2.4GHz Tx aerial. > [quoted text clipped - 5 lines] > > sea bee It's a black band that you put on the transmitter.....not a 'peg'. The PEG is for the frequency control board.... >> The BMFA recommends using a black peg on 2.4GHz Tx aerial. >> [quoted text clipped - 8 lines] > It's a black band that you put on the transmitter.....not a 'peg'. The PEG > is for the frequency control board.... From: http://www.bmfa.org/publications/24ghzguidance.html Quote: 'It is suggested that clubs utilising the "peg on" method of frequency control have a separate 2.4 GHz section for members to place a named peg.' This has been interpreted, with guidance from the BMFA, as 'peg on / peg off' i.e. you replace one of the black pegs on the board with your named peg and place the black peg on your Tx aerial - I think this is both unnecessary and possibly dangerous, but I don't know for sure. sea bee > http://www.bmfa.org/publications/24ghzguidance.html > [quoted text clipped - 9 lines] > > sea bee I agree, you don't want anything around your aerial that can interfere with the efficiency of the transmission system. I suggest you re read the BMFA suggestions....It is quite clear about a black ribbon on your antenna >>> The BMFA recommends using a black peg on 2.4GHz Tx aerial. >>> [quoted text clipped - 24 lines] > > sea bee a.. >>It is suggested that clubs utilising the "peg on" method of frequency control have a separate 2.4 GHz section >for members to place a named peg. For what reason? J. > a.. >>It is suggested that clubs utilising the "peg on" method of > frequency control have a separate 2.4 GHz section >for members to place a [quoted text clipped - 3 lines] > > J. a) to get you in the habit of using a peg system, just in case you go back to 35M, or have both :) b) There can be a quick and easy audit/head count of how may ppl are logged as active/flying. >> a.. >>It is suggested that clubs utilising the "peg on" method of >> frequency control have a separate 2.4 GHz section >for members to place a [quoted text clipped - 6 lines] > a) to get you in the habit of using a peg system, just in case you go back > to 35M, or have both :) Ok. > b) There can be a quick and easy audit/head count of how may ppl are > logged as active/flying. Pilots should be in a "flight circle", makes communication easier. And headcount simple. 35 Mhz is dying..... So for time being... use a peg. J. >> The BMFA recommends using a black peg on 2.4GHz Tx aerial. >> [quoted text clipped - 8 lines] >It's a black band that you put on the transmitter.....not a 'peg'. The PEG >is for the frequency control board.... not always we use a stake and peg system, we all have stakes and pegs and put them out when flying, and the peg is taken off and out on the TX when you have frequency. We don't have a fixed board and the council and farmer won't let us put one up at either of our sites (Actually on one site it would probably be vandelised or burn down!) , so we use the peg off method. 2.4 users DO need a flag and peg, mainly as most of our club don't fly 2.4 exclusively and go back to 35 depending on the plane and this keeps it in peoples routine. > The BMFA recommends using a black peg on 2.4GHz Tx aerial. > [quoted text clipped - 3 lines] > Given the short wavelength I would have thought the coil spring of a peg > might act as a choke. On JR/Spektrum antennas the active hit is above the bend, so as long as whatever you attach is below the bend it won't have any effect. I think that's the same for Futaba, but I can't be sure. We use pegs for 2.4GHz at our club really so that it's obvious who is active at the time. It's just a peg-on system though, and we are relaxed about leaving it on the board when not flying, typically it goes on when someone arrives and stays all day until they leave. Nobby |
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