[FADCA] Status of Dual Speak Mitrek for Melbourne LAN

[Doug Ferrell, KD4MOJ]

-----Original Message-----
From: fadca-bounces at mailman.qth.net
[mailto:fadca-bounces at mailman.qth.net]On Behalf Of bud thompson
Sent: Wednesday, January 12, 2005 10:39 AM
To: Florida Amateur Digital Communication Association
Cc: DICK K4FUY SEM CO EC; kptower at bellsouth.net; Rick Muething KN6KB;
Andy Leeds N3MCB; Charlie N3PPC; Victor Poor; Ivars Lauzums; Steve K4CJX
Subject: Re: [FADCA] Status of Dual Speak Mitrek for Melbourne LAN


<SNIP>
We do have the two PK-96s (1200 and 9.6kb) working with full cross-PTT and
cross RXA DCD working.  All we have to do is provide the unsquelched Mitrek
level back to the diode matrices to inhibit 9.6kb TX when a 1200b (carrier)
is on channel.  I'm sure we can do that with the help from your attachment.
We have tried all the other suggestions you made and feel we can make this
work - to the degree it should by AX.25 protocol constraints.  We have not
yet been able to marry a PK-96 and a Tiny-2 for TXA due to impediance mis
matches.  We can, however atain more than 2 KHZ deviation with both, so may
live with that..


Soon FADCA needs to prepare and publish a piece on "How To Get Your Area
on/into the Florida Layered Packet Network." This would include several
related topics, only one of which would be establishing a LAN from scratch.
This could cover the idea that, while used 1200b TNCs and old 2M radios are
easier/cheaper to come by, ultimately a LAN should have 9.6kb user access as
faster is the wave of the future as more users are added.  However, 9.6kb
not only requires a more expensive TNC but also a '9.6kb-ready" radio.
These considerations apply not only for individual users, but for fixed
locations such as EOCs, Hospitals, TelPac nodes, Digis, and, of course the
LAN port at the switch.  Chuck and Russ have been discussing use of local
VHF repeaters for piggy-backing 9.6kb packet user access, digis, etc.  This
will also need to be addressed.
</SNIP>

	Just wanted to throw in something here.... the Yaesu FT-2600 and a
Kantronics KPC-9612 will allow both 1200 and 9600 use at the same time. you
can go in at either baud rate and out the other rate. it takes making up a
cable but the nice thing about the 2600 is that it has a RS-232 built in the
radio. Unfortunately it's been discontinued but they do show up on ebay.


...DOUG
kd4moj