----- Original Message ----- From: "Peter Portanova" roic@optonline.net To: fwmeyer@richland.edu Cc: amsAT-BB@amsat.org Sent: Thursday, May 20, 2010 2:21 PM Subject: [amsat-bb] Fw: Re: New FO-29 Solar Array Current Graph
Frank,
We were forwarded, via the AMSAT-BB, from Mineo the FO-29 telemetry that you captured and anylyzed. As an observer and avid user of FO-29 I found it very informative. If the solar array output continues to deteriorate perhaps the control operators might consider a PL tone to open the transmitter to conserve the battery when not in use, which is what they are doing with AO-51.
73's PeteWB2OQQ
Hi Pete, WB2OQQ
I don't think it is possible to consider a PL tone on FO-29 to open the transmitter to conserve the battery when not in use because actually FO-29 is operating only:
Voice/CW (Mode JA) Uplink: 145.90 to 146.00 MHz CW/LSB Downlink: 435.80 to 435.90 MHz CW/USB Beacon: 435.795 MHz
and the
Digital Mode JD Uplinks: 145.850 MHz FM 145.870 MHz FM 145.910 MHz FM Downlink: 435.910 MHz 1200-baud BPSK or 9600-baud FSK Callsign: 8J1JCS Digitalker: 435.910 MHz
is out of service from many years now.In addition I don't think FO-29 in Mode JD has been designed to operate FM Voice with a PL tone.
How can you actually open a PL tone in ( Mode JA ) using an SSB transmitter ?
In my opinion it is best to use a minimum EIRP power on FO-29 to conserve the battery because actually FO-29 along with HO-68 and OSCAR-7 is the best available satellite for linear CW and SSB operation.
On FO-29 SSB I worked N2UN in New York from my JN70ES and it was a real thrill to contact Tony with his portable station on a promenade next to the East River.
73" de
i8CVS Domenico