1st Rule States - "If you don't hear 'em, you won't work 'em.", therefore, you must listen. Also, you won't interfere with someone already using the frequency. If you immediately transmit without listening first, then you may interfere with existing conversation.
Moreover, by listening, the good Operator takes after the Elephant ("big ears, little mouth") rather than the Alligator ("little ears, big mouth").
Several short calls interpersed with listening periods will be more effective than a single but continuous call not allowing anyone else to use the frequency.
2.KEEP IT SHORT:
Either the other station has heard you or he hasn't. Either way, it's a waste of time to keep on calling. Also, use your call sign. The other station knows his call sign. He or anyone else on the air wants to know who is calling.
Once the desired station is contacted, he also should give his call sign. Your conversation is being heard by anyone and everyone who is also on-the-air. Therefore, please give a few seconds spacing between turn-over in order for anyone else to break-in. Otherwise, both of you and the other station will be likely Hogging the frequency.
a. Do unto others . . . . . . . . . .
b. Don't interfere with another stations for any reason whatsoever, except in emergency.
If the air is being used, wait your turn.
c. Keep contacts short. Remember, only one station can use the repeater at any one time.
d. Long CQ are not necessary or desirable. If you wish, just report that you are on the frequency,
if anyone wants to contact you, and they are listening, they will come back to your call.
e. If you want to contact someone, its no use giving a series of long calls.
Either they are on repeater or they are not.
If they don't come back to your call, then they are not on channel.
f. Don't keep triggering the repeater just to make sure that it is still there.
This will wear-out relay contacts and cause infinite annoyance to others monitoring the channel.
g. In breaking in an existing conversation, it is recommended to break-in with your call sign during
"PAUSES" of the conversation. This is to save time since the other users do not have to call and ask for
you to identify yourself. Normally, one break is sufficient. Double break indicates urgency. Tripple break is
for extreme emergency.
Speak clearly and distincly into the "MIKE". Use "PHONETICS" whenever conditions warrant and use standard phonetics rather than a special set that you invented yourself.
Signal reports perform an important functions and should always be treated seriously. A weaker than normal signal from a certain area can indicate to the listener that his location is what commonly referred to as "Dead Spot". This location simply means that it doesn't have a clear path into the repeater. There is no point in continuing your contact if the signal into the repeater is Garbage (Garble). Better move to another locations.
Signal report that is effective on Simplex (Unit-to-Unit mode) is useless when working via Repeater.Principle here is GI/GO.
A. To call DV2RDO by DU2JAC:
"DV2RDO this is DU2JAC calling over".
"OVER" indicates transmission is finished. However, this is just a formality since going over the Repeater, the "Tail Squelch" of the Repeater indicates the transmission is over also.
B. To give Response/when Replying:
"DU2JAC this is DV2RDO over".
..... (modulation goes on) .....
"DV2RDO this is DU2JAC, frequency is clear/clearing the frequency".
C. To give a call to indicate you are Monitoring/On-Monitor:
"This is DU2JAC monitoring/on-monitor, "over" (optional).
If anyone would like to contact you, they will come back to your call, otherwise, just keep on silent monitoring.