[amsat-bb] Unsuccessful attempts to make APRS contacts through ISS or NO-84

Robert Bruninga bruninga at usna.edu
Fri Dec 30 16:08:20 UTC 2016

> On both birds I use CQ & Ariss during the outgoing TX attempts but

What do you mean "use"?  CQ never is a digipeater path,  SO me thinks you
are using them in the TOCALL and not in the VIA path?

-----Original Message-----
From: AMSAT-BB [mailto:amsat-bb-bounces at amsat.org] On Behalf Of
hdskullfire2 .
Sent: Monday, December 26, 2016 9:50 AM
To: amsat-bb at amsat.org
Subject: [amsat-bb] Unsuccessful attempts to make APRS contacts through
ISS or NO-84

I've been trying and trying to make APRS contacts through ISS (UHF) and
NO-84 (VHF) for some time now and have been unsuccessful in all attempts
even in cases where the bird was plenty high or right over my head. Here's
my working conditions..

Icom IC-9100 using a microKeyer II (MKII) as the interface. SatPC32ISS,
UISS (Pro Version), UZ7HO Soundmodem. The antenna array is a m2 Leo-Pack
and the rotator is a Yaesu G5500 being controlled with a Green Heron AZ-EL
unit. All software is the latest. Doppler shifting is working fine as
SatPC32ISS, IC-9100, and GH controller are talking to each other without
issues. I've listened to the outgoing sound of the packet and did not hear
anything unusual. In almost every case I've tried the lowest power and
increased power at varying levels without luck. I've monitored the
outgoing audio and adjusted the TX on the MKII to varying levels to make
sure the audio of the packet was not over cooked.

>From what I can tell everything is working well together and I can see
incoming packets from other stations decoding on UISS and Soundmodem.
However when I TX... No hits whatsoever. When I tested the system on the
local APRS frequency it works fine and other stations are digipeating my
packet signal.

I'm coming to the conclusion that this must be a problem with my settings
in either Soundmodem or perhaps UISS. The packets going up never get
repeated. On both birds I use CQ & Ariss (Tried others too) during the
outgoing TX attempts but nothing. I would really like if someone who uses
a similar setup and has things working to contact me.

I'm at wits end and now curtailing any further attempts until I get some
information on what may be going on..

Steve Nordahl, NS3L
Nazareth, Pa.
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