[DSTAR_DIGITAL] Re: Repeater can't hear well

2009-08-10 Thread Ernest Kapphahn
Sounds like your antenna has been isolated from your receiver. Check or replace the cable between the receiver and the duplexer. If that doesn't fix the problem, you may have a mis-tuned duplexer or a blown pre-amp if you are using one. RF issues are the same in digital as they are in

[DSTAR_DIGITAL] Re: APRS and D-Star

2009-02-05 Thread Ernest Kapphahn
On two meters and 440, we have programs in use called D-Chat and D-Rats that send data back and forth between users, either simplex or through a repeater connected to the gateway. There is no high speed data capability on two meters and 440 because high speed requires more bandwidth than we have

[DSTAR_DIGITAL] Re: Bringing New D-STAR Hardware and Software into the Network - A Proposal

2008-11-16 Thread Ernest Kapphahn
A good topic for discussion. Maybe we could designate a reflector channel or two for testing interconnections between linking systems (Echolink and IRLP). Much like the Western reflector (IRLP) uses 9258 for connecting to an Echolink conference bridge, we could agree that one of the channels on

[dstar_digital] Re: Inside Chassis coax - lossy

2008-06-30 Thread Ernest Kapphahn
Ron; The digital band plan being tested currently puts the D-Star outputs between 144.9 and 145.1 and the inputs 400 kHz down. This keeps everything in the spectrum designated by the FCC for repeater use. Since alternate input channels are inputs for analog repeaters, only 9 new channels

[dstar_digital] Re: Inside Chassis coax - lossy

2008-06-27 Thread Ernest Kapphahn
Yes, we tuned a Celwave 6 can mobile UHF duplexer to 100 db using an IFR and and a return loss bridge. It's the best one I've seen, as most are in the 75 to 85 db range. When Telewave recently retuned our 6 can full sized 2 meter duplexer for our new 400 kHz split, they were happy to hear that it