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[Αντώνης Παπαδόπουλος]

Σε σχέση με τα όσα αναφέρθηκαν για τις συχνότητες και την χρήση τους στην Ελλάδα, θα ήθελα να δούμε όλοι μαζί σε τι ποσοστό γίνεται χρήση της κάθε μπάντας, τουλάχιστον για τους χρήστες του forum.

Από τους αγώνες υπάρχουν στατιστικά, όπου επικρατεί η μπάντα των 35MHz και ακολουθεί η 40 και σε απόσταση αναπνοής η 72.

Νομίζω ότι θα είναι χρήσιμο για όλους.

Βεβαίως υπάρχει η περίπτωση να υπάρχουν αερομοντελιστές που κάνουν χρήση περισσοτέρων της μίας μπαντας. Σε αυτή την περίπτωση όσοι ενδιαφέρονται να λάβουν μέρος στην "ψηφοφορία" αυτή ας δηλώσουν την μπάντα την οποία εμπιστεύονται περισσότερο.

Αντώνης Παπαδόπουλος

[dapan]

Καλησπέρα
Θα πρεπε νσ υπάρχει η επιλογή δύο ή και περισότερων συχνότήτων..

dapan

[Periklis]

Σωστη η προταση του Αντωνη
Δεν ξερω αν ο Admin θα μπορουσε να φτιαξει κατι σε στυλ ψηφοφοριας ετσι ωστε ολα τα μελη του φοριυμ να δηλωσουν συχνοτητες μπαντες κλπ. Αναμενουμε με ενδιαφερον

[Periklis]

Σορρυ αλλα δεν προσεξα οτι υπηρχε ψηφοφορια... Τσαμπα η προταση...

[harrysvr]

Πέρι κορυφαίο το avatar σου



Εφόσον αυξάνονται τα μοντέλα που έχει ο καθένας καλύτερα είναι να έχουμε το ίδιο κανάλι (πχ 72) σε όλα  ή σε κάθε μοντέλο διαφορετικό κρύσταλλο;

[orck]

νομιζω οτι θα ηταν καλο να αναφεροταν τι ειναι νομιμο για Ελλαδα

[Αντώνης Παπαδόπουλος]

Καλημέρα orck,

Σε παλαιότερο post είχα αναφέρει για τις συχνότητες που πλέον νόμιμα επιτρέπονται στην Ελλάδα. Αυτές είναι στην μπάντα των 35 (34.990 εως και 35.200) και στην μπάντα των 40 (40.665 έως 40.695). Η μπαντα των 35 είναι αποκλειστικά για αερομοντέλα ενώ στα 40 επιτρέπονται όλα. Εχουν σητηθεί και άλλες συχνότητες από την επιτροπή αλλά ακόμα δεν έχουμε απάντηση.

Η συμμετοχή όμως σε αυτή την συλλογή στοιχείων έχει σαν σκοπό να δούμε τι περίπου ποσοστό κάνει χρήση τι ώστε ανάλογα να είναι και τα επιχειρήματα μας προς την επιτροπή όταν μας καλέσουν.

Αντώνης Παπαδόπουλος

[ΔΗΜΗΤΡΗΣ ΤΕΤΡΑΔΑΚΟΣ]

             Αντωνη καλησπερα ,καλησπερα σε ολους.                                                                                               
      Το εγραψα και προχθες θα το ξαναγραψω και τωρα.Ας μην αποτελουμε σε ολα παγκοσμια μοντελιστικη προτοτυπια.Ας μαθουμε ολοι να πεταμε στους 35.Με σωστη νοοτροποια και ενημερωση μεταξυ μας, στα κατα τοπους μοντελοδρομια ,ειμαστε σιγουρα περισοτερο εξασφαλισμενοι απο το να επιλεγουμε κατα βουληση μια μπαντα των 50 η'72 νομιζωντας οτι ετσι λυνουμε ολα  τα προβληματα                                                                                                                                                                                         Φιλικα Τετραδακς Δ.                                                                                             
                             

[kerpinis]

Όσοι έχουν ζήσει στο εξωτερικό καταλαβαίνουν τι πάει να πεί οργάνωση και υπευθυνότητα. Συνεπώς εάν υπάρχουν 5 λεπτά διαθέσιμα από τον χρόνο σας διαβάστε το κείμενο που κάνω επικόλληση.Είναι οι διαδικασίες που ακολουθούν οι Αγγλοι εδώ και χρόνια.

Ελπίζω και παρακαλώ να μην δω πάλι θέματα ΕΛΑΟ κλπ και διαμάχες γιατί τελικά ΜΟΝΟ σε αυτά είμαστε πρώτοι. Η ΕΛΑΟ έχει τονίσει στα μέλη της ποιες είναι οι επιτρεπόμενς συνχότητες και αυτό δεν είναι δική της απόφαση αλλά όλα διέπονται από κανόνες/κανονισμους ευρωπαικούς.

Και επιτρέπεται να έχουν ψηφίσει μόνο 30 άτομα? Οι υπόλοιποι πετάτε control line?Μέχρι και προχθές μετρούσε το 500 μέλος το φόρουμ...

Ευχαριστώ και συγνώμη για τον τόνο του μηνύματος

Μάνος
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FREQUENCY ALLOCATIONS AT CLUB SITES
THE CONTEST BAND PLAN

The original contest band plan, dating from the first allocation of 35 MHz frequencies,  is as follows:
R/C power . . . . . . . all odd frequencies
R/C silent flight . . . all even frequencies

The original allocation of competition channels was the responsibility of the BMFA Technical Committees but it was also used by most clubs as their standard 35 MHz frequency band plan. Increased demand for frequencies, however, has led to a widespread dilution of this system, both at club level and in competitions.
The 35 MHz frequency band is by far the most used by club flyers but, because almost every club operates in unique circumstances, it is not possible to recommend a fixed band plan for the regulation of those frequencies on every site.
There are, however, several different types of frequency allocation already in operation at club level, as laid out below, and all clubs should consider very carefully which method of frequency allocation they should use.

(1)   Use of all frequencies at 10 kHz spacing

This is the most used system and it is operated successfully by most clubs. Modern equipment gives very few problems at 10 kHz spacing, especially when common sense precautions against self generated radio interactions are taken.
As one safeguard, it is important that, flyers regularly operating together on adjacent channels should perform an adjacent channel check every two or three months.

THE ADJACENT CHANNEL CHECK

The check is quick and easy to do. Flyer A switches on transmitter (with aerial down), then switches on his receiver and stands about 4 metres from his model. Flyer B, on an adjacent channel, switches on transmitter (aerial up) and stands alongside flyer A. No interference should be noted on A’s model and it should be under the full control of A’s transmitter. The test is then repeated using B’s model and with his transmitter aerial down and A’s extended..
Any interference noted indicates possible tuning or crystal problems and must be investigated further. The test may save your model as it will give early warning of problems beginning in your radio equipment, usually well before they become bad enough to cause control problems in the air.
Use of all the frequencies at 10 kHz spacing, combined with the Club General Safety Precautions and the Adjacent Channel Check is probably the safest way to operate. Modern equipment is quite capable of operating to this standard and when faults do develop (usually faulty crystals) you have the ability to spot them before they cause trouble. 

(2)   Use of the Contest Band Plan

With this system power flyers use the ‘odd’ channels and slope/thermal/electroflight flyers use the ‘even’ channels.
This system may still be useful for some ‘silent flight’ clubs and for some power clubs with sites near to known slope or thermal soaring sites. Its use has, however, been overtaken by frequency requirements and availability and the ‘block frequency allocation’ is now more appropriate in many cases.

 (3)   Use of a Block Frequency Allocation

Where a club has a large site and is able to set up two or more flight lines, or where two clubs operate closely together then the block frequency allocation should be used.
For example, if a power club, using all frequencies at 10 kHz spacing, has room to set up a separate helicopter flight line, the frequency allocations could be:
Main flight line channels 55 to 79
Second flight line channels 81 to 90
Leaving channel 80 unused as a safeguard although, depending on site considerations, this may not be necessary.
Each flightline then has its own pegboard, allowing only the agreed allocated frequencies to be used.
Similarly, two clubs operating in close proximity could arrange that one used 55 to 71 and the other used 73 to 90, leaving 72 unused as a buffer.
Again, each group would have their own pegboard showing only those frequencies that they had agreed to use.
Many combinations can be worked out to suit individual needs and the increased number of channels made available in recent years has made this type of frequency sharing much easier. The ability to have targeted pegboards on each flightline or site is very important in avoiding frequency clashes.

(4)   Lone Flyers

Lone flyers, or people who fly in small groups of two or three, must take the greatest care that they are not operating in situations where they can cause interference to a local club or flying group. As a general rule, you should not fly within two miles of a recognised club flying site unless you have some arrangement with the club who fly there.
This is for the benefit of both parties as interference works both ways and could result in the loss of aircraft on either site.
If you wish to fly alone and are not sure if there are clubs sites local to you, contact your local model shop or the BMFA’s Leicester office for information. You will usually be able to get into contact with clubs quite easily through these sources and it is essential that you do so to ensure safe flying for all concerned.

PEGBOARD RECOMMENDATIONS

The Peg-Off System

The pegboard displays all used channel number/colours each with an appropriately numbered peg or marker clipped to it. To reserve a channel the flyer must take the correct peg off the board and, usually, clip it to his transmitter aerial.
Pegs must be returned to the board at the end of each flight or there can be confusion as to who has the right to fly. Flyers can easily forget this and it can then be difficult to find out who actually has the peg for a specific channel, especially at larger flying sessions.
Flyers sometimes take the peg home with them and the ‘missing peg’ can lead to a new peg being made. The problems when both pegs then turn up at the field can be imagined.
Even worse is the situation where it is assumed that a missing peg has been taken off-site and a new temporary peg is made for the rest of the day. You can very easily have two people both thinking that they have use of a frequency.
This system is useful for fixed base operations when the board and its pegs can be left on site without being subject to vandalism.

The Peg-on or Reversed Peg System

The pegboard is marked out with the channel numbers/colours as before but with no pegs. Each flyer carries his own named peg and to reserve a channel the peg is clipped on to the board before a transmitter is switched on. It is essential that pegs are removed from the board when a flight is finished and pegs must always carry the pilot’s name. Under no circumstances may pegs be shared by pilots or blank pegs used. You must be able to identify whose peg is clipped to the board.
If you go to the pegboard to reserve a frequency and it is in use, you can easily see who is using it and can arrange with them to reserve it later.
Under no circumstances should you simply remove a peg that is reserving a frequency.
If, however,  you suspect that a peg has been left on the board in error (the flyer may have gone home) then you should check with senior flyers on the field and the peg may then only be removed after stringent checks that it is no longer in use. The name on the peg helps again here and is yet another reason to make sure that all pegs are named.
This system is useful for sites where vandalism might be a problem as the pegboards can be made small enough to carry easily and each member of a club can have their own, only one being used at any flying session of course.

The Double Peg System

The pegboard used is exactly the same as for the peg-off system, complete with a full set of numbered pegs. The pilot, however, also has a named peg that he carries with him as in the peg-on system.
In use, to reserve a frequency, the pilot takes the numbered peg off the pegboard and replaces it with his own named peg.
This system still has to be used carefully but it is recognised as probably the most reliable system as it avoids several of the potential problems with the two other peg systems. It can still be wrongly applied, however, and all the comments in the peg-off and peg-on systems should be noted and applied.


The Individual Marker System

A further popular system is where each club member has their own small individual frequency marker board with their name and channel number marked on it. These are stuck side by side in the ground by the flyers as they arrive on the site making, in effect, one large pegboard. Flyers on the same frequency place their markers one behind the other and use a peg or similar to reserve the channel between them.
This system has been known to be effective on beach and hill sites as the marker boards can carry ‘permit to fly this year’ details as well as name and frequency information.
There are other variations and clubs should select the system which they feel is most appropriate to their flying field situation and, whichever system is chosen, should ensure that the operation of frequency control is well understood by all their members and visiting flyers.

Pegboard Problems

(a)   Switching on without ‘getting the peg’ is the cardinal sin and can have very serious consequences so you should make very sure that your flyers do not slip into such bad habits. It cannot be emphasised enough that your club should insist on high standards of training in the use of your frequency control system. The move to the pegboard before even thinking about switching on should be second nature to all your flyers.
(b)   Changing crystals, either on the field or at home, can also have very serious consequences if the flyer forgets that they have done it. It is very easy to then take your ‘usual’ peg and reserve a completely different frequency to that which you are using. The dangers are obvious.
If channels are changed, it is essential that channel flags are used and changed with the crystals. Pilots must discipline themselves to act correctly in these circumstances as it is very easy to make a mistake with the pegboard after a change has been made..

[ΔΗΜΗΤΡΗΣ ΤΕΤΡΑΔΑΚΟΣ]

       Πεστα ρε Μανο ,γιατι νομιζω οτι ο μοναδικος κακος που γινομαι ειμαι εγω, που γκρινιαζω στα μοντελοδρομια.Λεω πολλες φορες ,σ' αυτους που βλεπω να πετανε με "προσωπικες" τους συχνοτητες ,οτι " διακυνδυνευω " τα Ε/Π που πεταω αγωνες  (απο αλλους πομπους), αλλα τουλαχιστον ξερω οτι ειμαι εξασφαλισμενος απο αλλους παραγοντες ,που ειναι σιγουρο οτι δεν μπορω να ελεγξω.                                                                                                                     
                                          Φιλκα Τετραδακος Δ.

[ΔΗΜΗΤΡΗΣ ΤΕΤΡΑΔΑΚΟΣ]

       Γιαννη Κουτσ. καλησπερα.Εχω ξεμεινει Βολο με το Ε/Π. Επιστρεφω αυριο. Θα μιλησουμε μετα στο τηλ.BYE.....

[Hobbitakos]

Να που ειμαστε ολοι μαζι ο Ψωμας και Πασχαλουδης λειπει

[kerpinis]

       Πεστα ρε Μανο ,γιατι νομιζω οτι ο μοναδικος κακος γινομαι ειμαι εγω που γκρινιαζω στα μοντελοδρομια.Λεω πολλες φορες σ' αυτους που βλεπω να πετανε με "προσωπικες" τους συχνοτητες ,οτι " διακυνδυνευω " τα Ε/Π που πεταω αγωνες  (απο αλλους πομπους), αλλα τουλαχιστον ξερω οτι ειμαι εξασφαλισμενος απο αλλους παραγοντες ,που ειναι σιγουρο οτι δεν μπορω να ελεγξω.                                                                                                                     
                                          Φιλκα Τετραδακος Δ.

Έλληνες Δημήτρηηηηηηηηη...Έλληνες....  Που να πας να βγάλεις και κανα δημόσιο έγγραφο...άστα να πάνε..

Μάνος

[ΔΗΜΗΤΡΗΣ ΤΕΤΡΑΔΑΚΟΣ]

Γεια σου Αντωνη.Τα λεμε μετα.....

[Hobbitakos]

οκ Δημητρη φευγω  θα τα πουμε το βραδυ φευγω για δουλεια