[aprssig] Looking for 9600 baud equipment

Scott Miller scott at opentrac.org
Sun Sep 28 13:16:10 CDT 2008

Hi all,

My first batch of data radios is due in soon (both VHF and UHF) so I 
figure it's about time to start working on 9600 baud support for my next 
TNC project.  Right now I've only got a couple of EJ-41Us to work with, 
and I'm hoping to find at least a few different TNCs for compatibility 
testing.  A KPC-9612 and an original G3RUH modem would be great for 

I'm willing to buy, trade, or borrow (for a few months) if anyone's got 
gear they're not using.  I'm just tired of trying to get stuff on eBay, 
and I already spend too much on new stuff that I only need for a little 

And if anyone's got good information on compatibility between existing 
products, let me know.  I'm having a hard time figuring out which ones 
use a root-raised cosine matched filter, for example.  It's hard to 
determine even which ones are actually G3RUH-compatible.  It's the same 
problem I had when learning the low-level details of 1200 baud packet 
and SSTV - too many well-meaning hams writing explanations of the modes 
based on their appliance-level experience, without any real knowledge of 
the details.  Makes it hard to find the real information.



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