An around the world balloon attempt will be made sometime next week. The payload is about the size of two 9v batteries (50 grams) and will be carried by 10 underinflated party balloons above 40,000 feet in the Jet Stream.
The balloon will only have CW battery, Inside and Outside temp data. All tracking will be done by DFing on 28.223 MHz. Ideallly, everyone with APRS will enter DF reports using the built-in DF functions in most clients so that the track can be plotted. Those without APRS can email DF headings to the indicated address.
The web page is in work but will simply be APRS.ORG to keep the CW short.
We are busy finishing it. Anything new will be posted on the web page when we know it.
Bob, WB4APR
Question: since the balloon will be flying below 50 km, and therefore not operating as a space station, how are you handling the issue of a US amateur station transmitting in foreign jurisdictions? Reciprocal operating permits or licensure in all anticipated jurisdictions in the flight path, or what? And do all jurisdictions thru which your payload will fly, or might land, allow amateur transmissions on 10 meters?
George, KA3HSW
----- Original Message ----
From: Bob Bruninga bruninga@usna.edu To: amsat-bb@amsat.org Sent: Fri, March 2, 2012 8:45:44 AM Subject: [amsat-bb] Round the world APRS balloon
An around the world balloon attempt will be made sometime next week. The payload is about the size of two 9v batteries (50 grams) and will be carried by 10 underinflated party balloons above 40,000 feet in the Jet Stream.
The balloon will only have CW battery, Inside and Outside temp data. All tracking will be done by DFing on 28.223 MHz. Ideallly, everyone with APRS will enter DF reports using the built-in DF functions in most clients so that the track can be plotted. Those without APRS can email DF headings to the indicated address.
The web page is in work but will simply be APRS.ORG to keep the CW short.
We are busy finishing it. Anything new will be posted on the web page when we know it.
Bob, WB4APR
After a 3 month wait I finally received the replacement for a damaged gear in my G5500 azimuth rotor. Replaced the damaged gear, and the gear assembly smoothly turns both directions. However, when using the motor the rotor rotates to left at normal speed but right at about half speed. It also occasionally momentarily stalls when turning right.
If the motor is damaged wouldn't it affect both directions? There is a slight aroma of a electrical wiring left over from the failure three months ago. Suspect I need a motor replacement, but would like to confirm this with the group. Seems strange only one direction would be affected since I'd think the same windings are used in both directions. A few years ago when the motor failed it didn't move in any direction.
Incidentally, the gear that failed was the plastic gear that the motor drives (Yaesu part number PE-8601-010-A). The coax caught on a exposed bolt.
Tnx, Ken, W7KKE
Hi Ken,
A couple of things to check. The resistance of the motor should be same for both directions, ie between red and black should be around 3.5 ohms as well as green and black. Total series resistance of motor should be around 7 ohms. When mine stalled, the motor overheated and one winding was only 1 ohm, definitely a short.
Other thing to check is that you put the brake back together in right orientations. Theres a circular spring inside a nylon cylinder that holds the metal driver from motor and the white nylon gear with tab. If the prongs on the spring are at 10 and 2 oclock, the white tab from gear should go at 12 oclock and the motor driver wings at 9 and 3 oclock. Thats how it is in mine, if orientation like that motor drives gear freely, and gear cannot drive motor.
I sent my motor down to LA a week and a half ago for rewinding - so far seems USPS has yet to deliver it, ugh. Running with elevation control only right now, with antennas fixed at 270 degrees. Flipping backwards gives me a few degrees at 90 azimuth as well, but beamwidth of the yagis isnt great so not best solution! Yaesu parts says maybe 4-6 weeks for motors to come from Japan.
73! Dave KB5WIA On Mar 4, 2012 9:00 AM, "Ken Swaggart" k.swaggart@charter.net wrote:
After a 3 month wait I finally received the replacement for a damaged gear in my G5500 azimuth rotor. Replaced the damaged gear, and the gear assembly smoothly turns both directions. However, when using the motor the rotor rotates to left at normal speed but right at about half speed. It also occasionally momentarily stalls when turning right.
If the motor is damaged wouldn't it affect both directions? There is a slight aroma of a electrical wiring left over from the failure three months ago. Suspect I need a motor replacement, but would like to confirm this with the group. Seems strange only one direction would be affected since I'd think the same windings are used in both directions. A few years ago when the motor failed it didn't move in any direction.
Incidentally, the gear that failed was the plastic gear that the motor drives (Yaesu part number PE-8601-010-A). The coax caught on a exposed bolt.
Tnx, Ken, W7KKE
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participants (4)
-
Bob Bruninga -
David Palmer KB5WIA -
George Henry -
Ken Swaggart