Nate Bargmann wrote:
> * Ron Wright <[EMAIL PROTECTED]> [2007 Aug 03 08:48 -0500]:
>> Nate,
>>
>> I looked in my KPC-3+ manual and they do call out a DCD line on both the
>> RS232 DB25 connector, pin 8, and also on the 9 pin radio connector.
>> However, I cannot find any reference to it in the m
* Ron Wright <[EMAIL PROTECTED]> [2007 Aug 03 08:48 -0500]:
> Nate,
>
> I looked in my KPC-3+ manual and they do call out a DCD line on both the
> RS232 DB25 connector, pin 8, and also on the 9 pin radio connector. However,
> I cannot find any reference to it in the manual. Probably there, but
om the inital question this probably would work since little data might be
>going thru the system.
73, ron, n9ee/r
>From: Nate Duehr <[EMAIL PROTECTED]>
>Date: 2007/08/03 Fri AM 03:08:44 CDT
>To: Repeater-Builder@yahoogroups.com
>Subject: Re: [Repeater
On Aug 2, 2007, at 7:03 PM, Ron Wright wrote:
> Nate,
>
> Would just disabling one PTT while the other is txing mean the
> disabled would think it was transmitting, but not really.
That's not what I recommended. I recommended tying one's PTT signal
to the other's RECEIVE signal so it would
the other TNC commanding a wait.
73, ron, n9ee/r
>From: Nate Duehr <[EMAIL PROTECTED]>
>Date: 2007/08/02 Thu PM 12:15:20 CDT
>To: Repeater-Builder@yahoogroups.com
>Subject: Re: [Repeater-Builder] Connecting Multiple TNCs
>
>Eric Lemmon wrote:
>> Dav
Eric Lemmon wrote:
> Dave,
>
> I'd like to see that article, too. Connecting two TNCs to one radio is
> easy, but allocating the RX and TX functions between two devices is hardly a
> trivial matter. Unless a buffer is used to store outbound data while the
> radio is busy receiving data on the ot
>
>>Dave, WA6IFI
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Ron Wright
Sent: Thursday, August 02, 2007 9:13 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: Re: RE: [Repeater-Builder] Connecting Multiple TNCs
Eric,
O
hardwired lines, no components except connectors. Again the TXs need to
be isolated with resistors.
73, ron, n9ee/r
>From: Ron Wright <[EMAIL PROTECTED]>
>Date: 2007/08/02 Thu AM 07:45:59 CDT
>To: Repeater-Builder@yahoogroups.com
>Subject: Re: RE: [Repeater-Builder] Connec
I seem to recall that the trick to doing this (other than diode steering the
PTT's and isolating the audio) was to steer the PTT signal from each TNC to
the other's RF-DCD port through a diode. That way, each TNC would know when
the other had the PTT in use. This was most commonly used to mux 1200
freq
here.
73, ron, n9ee/r
>From: Eric Lemmon <[EMAIL PROTECTED]>
>Date: 2007/08/01 Wed PM 09:18:40 CDT
>To: Repeater-Builder@yahoogroups.com
>Subject: RE: [Repeater-Builder] Connecting Multiple TNCs
>
>Dave,
>
>I'd like to see that article,
Eric,
I am sure you can connect the audios together from/to both rigs. One would
have to isolate the TNCs TX audio using just a couple of resistors. Their
values would depend on the rig TX audio input impedance, but typically is high
on Ham rigs so 1 kOhms resistors would probably work.
Th
Kantronics built dual speed TNCs with a provision to prevent the problem Eric
describes. It would allow you to interface both speeds to one radio and a
parameter can be set to prevent them from both trying to transmit at the same
time.
73 - Jim W5ZIT
Eric Lemmon <[EMAIL PROTECTED]> wrot
Dave,
I'd like to see that article, too. Connecting two TNCs to one radio is
easy, but allocating the RX and TX functions between two devices is hardly a
trivial matter. Unless a buffer is used to store outbound data while the
radio is busy receiving data on the other TNC, collisions will occur
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