I just can't believe that I got enlightment from the master him self :)
----- Original Message -----
From: "Tim Miller WB0RXX" <svxlink@...>
To: "Discussions about development issues"
Sent: Friday, August 03, 2007 8:43 PM
Subject: Re: [Svxlink-devel] Full Duplex repeater with Full Duplex Link
> As it stands, my interface will only handle two radios, or two
> transmitters and two receivers. It would be easy to expand it by just
> doubling the circuit. Please see the PDF schematic on my web site for
> more information.
The PDF is the first thing I read.
First I found SvxLink url .. but afaik there is no hot-link to what
interface will needed .. so I do googling for the interface and found your
Yes, I understood that this circuit can be doubled while still using single
RS-232 for controll.
I'm not really good in electronic, but I'm sure it won't be much work to do
it, shared U1 and U2
OOT : While talking about pcb , any person here took a look at cnczone ?
there is a discussion about sppeding up your PCB work. They talk about
printer-mod to print directly to a PCB. they can do double layer , label
print , and verry thin line with that..
> It appears you are trying to use four radios - two transmitters and two
> receivers. If so, then yes, a single RS-232 control link should work
> just fine.
Basically, it'll just two TX and Two RX.
AFAIK, the most compact things is using 2 MASTR-II, but I thnk I'll
experiment using 4 HT class transceiver.
Talking about price : 2 x MASTR-II is more expensive then 4x DR-135 (we can
got DR-135 for around USD 140 here)
Any docs on moding basic mobile or basic HT transceiver to be Full-Duplex
(TX while RX) ?
> Even though the source code implies that one can set the name of the
> logic modules to anything you wish, I was unable to rename "Repeater" to
> "Repeater1" and "Simplex" to "Repeater2" and make it work. Of course,
> this was attempted a while back, so perhaps it is now possible.
I'll report my luck
> You might want to check out the man pages for the system, as Tobias has
> done a very good job writing them.
Yes, my greatz for Tobias.
I hope I'll got more knowledge about SvxLink the more time I play with it
> > 2. The audio will directly connected between radios, not using /dev/dsp,
> > unless I need to do dtmf to open the repeater or CTCSS
> You are going to have a hard time using anything but the COR/timer if
> you do not at least setup the receive audio. :-)
Uuugh ... my english is bad.
Kindly please give me more explanation about this.
> > 3. I'll try to port it with minimum (Non GUI) to LEAF (debian based
> > mini-distro)
> You might also try Slackware. I have such a system setup here and it
> works with a very minimal hardware footprint.
If you come from Slackware world, and want to play with some small-distro ..
you can take a look at :
AlfaLinux : http://alfalinux.sourceforge.net/alfaeng.php3
RUNT : http://runt.mybox.org/
SLAX : http://www.slax.org/
I'm a mini-distro lover. I used to run hundreds of it for wireless router
and accesspoint. Some of them is positioned on hill-top, act as a "repeater"
(in this case as "router) from one network to another.
I't hard to find one that based on slackware, so I just go with debian based
( http://leaf.sourceforge.net )
I really appreciate your enlightment