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Hi again guys.
I checked the notches on each tin and they were on frequency and the markings were the correct way around .I removed the tee piece and checked the output after the 2nd tin and the reading was 15watt so I recheck the output with the tee back inplace and still 7-8 watt output .I adjusted the db disks on the tins and also readjusted the pa section to give max output and ended up with 14-15 watt output with -110db signal with no chopping so it must have been a combination of these things.
Thank You,
Ian Wells,
Kerinvale Comaudio,
-------Original Message-------
Date: 05/07/06 01:58:20
Subject: RE: [Repeater-Builder] cp70-422n
The notch caps have been modified by the tech to suit the 2.5 meg split so I hope it is ok but I hope to be checking with rfs Australia on Monday but I did talk to one of their guys on Friday and they said it would work ok with the 2.5 meg split but the real expert on them wasnt available till monday .Also I hope to check it tomorrow to make sure the tech named the ports correctly and that they arent back to front .
.The transmitter is a Philips fm828
Thank You,
Ian Wells,
Kerinvale Comaudio,
-------Original Message-------
Date: 05/07/06 01:43:50
Subject: RE: [Repeater-Builder] cp70-422n
Ian,
The RFS/Celwave CP70-422N duplexer is a good product, but you might contact Celwave regarding the 2.5 MHz split you're using. Some duplexer designs don't necessarily work better with wider splits. The CP70 duplexer is specified for a 600 kHz split, and its loop settings might not be optimum for a 2.5 MHz split. Check with Celwave Tech Support for a definitive answer.
Keep in mind that TX power measured into a resistive (dummy) load can be quite different when measured into a reactive (duplexer) load. Depending upon the make and model of your PA, it may be a good idea to experiment with different jumper cable lengths between the PA and the TX input on the duplexer, or install an impedance matching device (Z-matcher) at the PA output.
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Hi guys. I have the above diplexer and I am concerned about the amount of power loss I am getting. I have 18watts going into the tx port on 78.1375 MHz and only 7-8 watts coming out the antenna . Rx frequency is 80.6375 MHz. It was tuned up by a firm here in Queensland
Thank You,
Ian Wells,
Kerinvale Comaudio,
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