Live tracking
Day 5 update: 05-Jun-2020
Day 1 update: 01-Jun-2020
Launch photos
Transmitter
This is the 10'th test flight of the new U4B tracker. For details see below.
The WSPR callsign on 20m is VA3UAL and telemetry uses the old-style channel 43. The WSPR transmission is on minute :04 past the hour and every 10 minutes; it is followed by the telemetry transmission. The balloon glyph precedes the WSPR transmission in minute :03 :13 :23 etc.
U4B-10 was launched on 01-Jun-2020.
Live tracking
Day 5 update: 05-Jun-2020
Day 1 update: 01-Jun-2020
Successful launch and ascended to around 11,600m!
The balloon glyph was copied by Bill W4HBK:
Launch photos
Transmitter
This is the 10th test flight of the new U4B tracker. U4B-10 was assembled by Dave VE3KCL. This YouTube video explains the features of the U4B tracker.
U4B-10 includes a balloon glyph just prior to the WSPR transmission. This is the same as on previous flights, There is a slow-Hellshreiber "X" to the left of the balloon!
The BASIC program listing:
5 LET C = 44 6 PRINT BT 7 IF BT < 3200 * check for 3.2v or sleep 8 SLEEP 10 1 9 GOTO 6 10 ENDIF 15 PRINT BT 18 IF BT > 3600 * look for 3.6v for high power mode else low power mode 19 LET I = 1 21 GOTO 26 22 ENDIF 24 LET I = 0 26 LET FR = 26999800 * set reference oscillator for epson tcxo 27 OUT 9 0 28 GPS 304 "$PSIMNAV,W,3*3A" * sim28 high altitude string 29 OUT 9 CL 32 SLEEP 10 3 33 OUT 9 0 41 CW 0 14096950 12 0 " VA3UAL" 42 CW 0 14096920 5 0 "*010A3755370A*" *set glyphs lower on qrss 20m band 43 CW 0 14096920 5 0 "*01IFLCNAP8Q7R6R5S0S0S5R6R7Q8PANCLFI*" 45 TELE 47 HELL 0 14096920 20 8 "QRP" * compare x to slow hell for qrss penetration 48 CW 0 10140040 5 0 "*010A3755370A*" *30m glyph ident 49 CW 0 10140040 5 0 "*01IFLCNAP8Q7R6R5SOSOS5R6R7QPANCLFI*" 50 GOTO 15 VA3UAL 14097165 362 bytes compiled firmware v.33 ch44 start minute 04 tele 06 6 solar cells only so set the high power level lower at 3.6v Normal lowest flight voltage should be 3.42 volts with 6 solar cells
