At 05:28 AM 07/06/10, you wrote: >Greetings, > > Can anybody help me to make a makeshift repeater, I need a > schematic diagram for carrier >operated relay or "COR" for two radio transceivers to be converted >into a repeater. >Thanx to anyone who can help on this. > >Manny , ( [email protected] )
Some radios are easier to interface to a repeater controller than others. Transmitters are not hard - audio and PTT. Receivers are another case - you need to find a carrier sense point and a tone decode sense point. What radios are you going to be using? And don't forget duty cycle - the average mobile radio transmitter is 10 to 20% (look at the spec sheet for the particular radio). In mobile service the mobile transmitter is used rarely. In a repeater it's used for ALL user transmissions, one after the other. In some cases it may be on 80% of the time - and the average mobile will meltdown in that situation... Mike WA6ILQ
