I have an XPR8400 Repeater running in mixed mode and I am thinking to dedicate the analog side to a Packet BBS, would that be possible to do through the Ethernet port ? So the Packet BBS would essentially operate as a simplex device instead of as a repeater?
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XPR8400 Repeater Packet Mixed mode?
- Thread starter W5DMH
- Start date
kayn1n32008
ØÆSØ Say it, say 'ENCRYPTION'
No. The ethernet port is strictly for networking for IP site connect, Capacity Plus Trunking and Connect Plus Trunking.
For Cap+/Con+ trunking it is used to have a stack of repeaters at the site AND for networking if it's a multi site system.
It won't operate as a simplex system easily. Much better to have a Packet BBS on its own dedicated frequency and radio. Most Packet BBS or digipeaters operate as 'store and forward' and don't have a high duty cycle.
Thanks, I kind of thought that but had to ask. I have a small 150ft tower with one antenna on it, now to figure out how to share that antenna between the repeater and the BBS radio.
kayn1n32008
ØÆSØ Say it, say 'ENCRYPTION'
What frequency is the BBS, and what pair is the repeater?
kayn1n32008
ØÆSØ Say it, say 'ENCRYPTION'
If you have a 147MHz pair for the repeater, and the BBS is on 145.0100, get an additional 6 cavity VHF duplexer, tune the low pass side for 145.01, and tune the high pass side to pass both the input and output of the repeater. Connect the repeater duplexer antenna port to the high pass side, connect the BBS to the low pass side. The second duplexer needs to be 6x 6" cavities. Ideally the duplexer on your repeater needs to be 6x 6" cavities as well.
Using a second duplexer is the 'easiest' option.
Another(better) option, if you have more than 350kHz separation between the 3 frequencies, is to aquire 3x 4 cavity multicouplers. One for your repeater receive, one for repeater transmit and one for the BBS. Downside is, unless you can find 3 multicouplers used, they are not cheap to buy new.
The club I belong to currently has a VHF ham repeater, APRS digipeater and a ECCC Weather radio transmitter all combined using 4 cavity multicouplers, to a single antenna. The photo attached shows the racked multicouplers on the right side.
Using a second duplexer is the 'easiest' option.
Another(better) option, if you have more than 350kHz separation between the 3 frequencies, is to aquire 3x 4 cavity multicouplers. One for your repeater receive, one for repeater transmit and one for the BBS. Downside is, unless you can find 3 multicouplers used, they are not cheap to buy new.
The club I belong to currently has a VHF ham repeater, APRS digipeater and a ECCC Weather radio transmitter all combined using 4 cavity multicouplers, to a single antenna. The photo attached shows the racked multicouplers on the right side.
My repeater is Business TX 451 RX 456 and I would have to acquire another frequency for the BBS but that would not be a big deal. The antenna is capable of 450-470 so frequency separation could be wide . I will look into the 3x 4 cavity multicoupler route. Thank you for the info as it gets me some idea of how to package this to make it work.
Yikes, after investigating the cost, it is probably a lot more cost effective to add another antenna to the tower.
kayn1n32008
ØÆSØ Say it, say 'ENCRYPTION'
I agree.
kayn1n32008
ØÆSØ Say it, say 'ENCRYPTION'
Is the packet BBS also on UHF?
It doesn't have to be, I can put it on VHF 151.700MHz
