Picon

T3-Mini and ADS-GM2 Problems in Balloon Flight



I recently flew a tracker built with a T3-Mini on a balloon flight.  Had some issues.  I've put all of the relevant info that I have into a web page:


http://ky7dr.com/dreams/dreams20140723.html


2 problems noted there:


1. Rapid, nearly continuous transmissions for a period during ascent and for a period during descent, and

2. Loss of GPS data at altitude.


If anyone has any insight into these problems, I'd like to hear from you.


David, ky7dr



__._,_.___
Posted by: david-ufYPM9bfpGVWk0Htik3J/w@public.gmane.org



__,_._,___
Picon

CT-M3 cable?



Hi,

I need a good base/mobile radio for my iGate.  I'm thinking about the Yaesu FT-2900R.  The CT-M3 tracker cable is listed as "coming soon".   Is it going to be more than a few weeks?  Need something soon.

Chris
NW5W


__._,_.___
Posted by: Christopher Snell <chris.snell-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>



__,_._,___
Picon

OTUSB Multiple DS18S20



Can you use multiple DS18S20's with this system and have them all report the temperature?


Thanks,


Tony

W5ADC



__._,_.___
Posted by: tony-HsP0amnHlDQAvxtiuMwx3w@public.gmane.org



__,_._,___
Picon

OpenTracker-USB cable and configuration for KISS. [2 Attachments]

[Attachment(s) from raymizie-/E1597aS9LQAvxtiuMwx3w@public.gmane.org [tracker2] included below]

Hi Scott, I face a problem to use OT-USB as TNC (KISS mode) with my router. If we just connect OT-USB DB9 pin5 and pin6 to speaker radio, is it can be done to receive packet? or we must connect another pin? I just want to use it as rx-igate. The OT-USB powered by USB and i use it in KISS mode. I also want to know a correct config for OT-USB for KISS mode. Thanks.




__._,_.___

Attachment(s) from raymizie-/E1597aS9LQAvxtiuMwx3w@public.gmane.org [tracker2] | View attachments on the web

2 of 2 Photo(s)

Posted by: raymizie-/E1597aS9LQAvxtiuMwx3w@public.gmane.org



__,_._,___
Picon

Re: Re: T3-mini decoding problem with Moto GM300



Another problem you are having is the decoder is expecting De-Emphasized audio.

1200 Baud packet should be:
TX Audio to Radio is "flat" (normal human audio), Is applied to the MIC input on the radio
- The MIC input get pre-emphasis applied before transmitting.

RX Audio  to TNC should be "flat" audio - Audio should either have a de-emphasis network IF using the discriminator out of the radio.
- Speaker audio goes through a de-emphasis network in the radio.

Mark
KC5EVE

At 07:10 AM 7/20/2014, Jason KG4WSV kg4wsv-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org [tracker2] wrote:
 


On Sun, Jul 20, 2014 at 7:03 AM, ve2onr-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org [tracker2] <tracker2-hHKSG33TihhbjbujkaE4pw@public.gmane.org > wrote:

I'm brining back this subject because my problem isn't solved. Does any body experienced the same decoding problem on a T3-mini using the discriminator output of the radio?


No, but we just had a thread here (or maybe it was on the OT list?) where Scott said the T3-mini does not have the op-amp circuit of its big brother, so it needs lots of signal to decode well. Â I'm guessing the discriminator output won't cut it.
Â

My next solution is to build a little preamp but I don't want to overdrive the receiver of the T3. Is there a max input value and does somebody have already build a similar project?


 Check the T3 schematic for the amplifier used there, for a starting point.


-Jason
kg4wsv


__._,_.___
Posted by: Mark Cheavens <mcheavens-Jdbf3xiKgS8@public.gmane.org>



__,_._,___
Attachment (19e15567.jpg): application/octet-stream, 1981 bytes
Picon

T3-Mini footprint



Is there a DIP socket that fits the T3-Mini?  I suppose I could just use two rows of female headers on a PCB but that's less sturdy than than a proper DIP socket if one is available.

Thanks,

Chris
NW5W


__._,_.___
Posted by: Christopher Snell <chris.snell-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>



__,_._,___
Picon

Re: Digi only certain users


>
> > I would like my T2 in my car to digipeat only when it hears a certain user.
>
>Can't be done.

I have not dug into the specifics if a T2 can do it or not (see below)

> > Basically i am part of a SAR team and sometimes our team got to areas
> > where there are no other digipeters, but most of the time i drive around in
> > an area that is well covered and i dont want to cause problems/congestion
> > on the network, But in the event of an emergency for the SAR team i do
> > not have time to change the T2's settings.
> >
> > Can i use alias's to do this? so my T2 will only Digipeat X3XXX if no one
> > else has done it?
>
>Nope... no one has made digipeater hardware or software to selectively
>digipeat only specific users. That's totally against the purpose of a
>digipeater. It should support all users.

That statement is not correct. A TNC-2 or KPC3 can each be configured 
to DROP or to only allow from specific stations.
BUlist (on/OFF) Treats LCALLS as the only station to monitor (default 
is treat is ignore list)
LCAlls (1-8 stations to IGNORE or specifically ALLOW)

TNC-2 Command list:
http://paccomm.com/cmdrefcrd.html

KPC-3 Commands are a little different using
BUDcalls and CONlist

KPC-3 Command list:
http://www.kwnet.net/n7qqu~/eq-manuals/KPC-3_reference_manual.pdf

In UiDigi and other hybrid TNC's not all commands are supported. 
UiDigi you can have a BUDlist to ignore users, but not an allow list.

Sincerely,
Mark Cheavens
KC5EVE 

------------------------------------
Posted by: Mark Cheavens <mcheavens@...>
------------------------------------

Picon

Re: Digi only certain users

On 7/13/2014 10:57 PM, James Ewen ve6srv@... [tracker2] wrote:

> WIDE2-2,SAR,WIDE2-1

James, could you expand on the purpose of the WIDE2-1 at the right end 
of the path?

Bob...

------------------------------------
Posted by: Bob Burns W9BU <w9bu_lists@...>
------------------------------------

Picon

Digi only certain users



Hi all, 

I would like my T2 in my car to digipeat only when it hears a certain user. 

I.e User X3XXX sends beacon out and my car picks it up it will Digipeat it but will not digipeat anyone else. 

Basically i am part of a SAR team and sometimes our team got to areas where there are no other digipeters, but most of the time i drive around in an area that is well covered and i dont want to cause problems/congestion on the  network, But in the event of an emergency for the SAR team i do not have time to change the T2's settings. 


Can i use alias's to do this? so my T2 will only Digipeat X3XXX if no one else has done it? 


Any help or sugestions (in user friendly language) on how best to se t this up would be great. 


Cheers

Haydn



__._,_.___
Posted by: haydn-ahqU6YTo2wCc/75gGNOK3g@public.gmane.org



__,_._,___
Picon

No TX



Hi All, 

Hope someone can help me, I have a T2 and been using for a few years, all of a sudden it stopped working. 

I did not get to look at it for a while due to getting a new car. 

Today i have looked and it is Receiving Ok (can see green light come on and the ACT light flash green while listening to the channel on another radio) I have set up the T2 with radio and GPS and gone for a drive, nothing happens, no TX light. When i power it up or use PC to program it all lights work. 

I have tried it with a different radio and GPS and lead, I have a T1 and that works fine, replace the T1 for T2 and no TX. 


hope this makes sense  p>


Any ideas what is wrong and/or what i can check would be gratefully received.

Cheers

Haydn M3WOV 



__._,_.___
Posted by: haydn-ahqU6YTo2wCc/75gGNOK3g@public.gmane.org



__,_._,___
Picon

OT2/FT1900/j-pole in the Plane



Thanks for the thoughts on polarization - it has been considered, but the j-pole is a cheap, easy, no-drag install in the plane, and in practice it works better than predicted.  The RV group has over 100 of these flying with great results using some very low power/light weight microtrak units.   I previously had that a microtrak with the same antenna and did not get the dropouts that I see with the current setup, thus my question.   I am running the lowest power possible on the 1900.

I will make sure the audio in is disabled and see if that helps - thanks again.

--



__._,_.___
Posted by: Pete Howell <pete.howell-GHc6QyM5l+yZox4op4iWzw@public.gmane.org>



__,_._,___

Gmane