December 2024 - pacsat-dev - mailman.amsat.org

Pacsat dev meeting schedule
by Bill 19 Dec '24

19 Dec '24

Our next pacsat dev meeting will be on Thursday January 9, 2025. Have a great holiday and a happy new year. Bill, NX5R

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Re: Pacsat dev mtg 12/19/2024
by Corey Minyard 19 Dec '24

19 Dec '24

I won't be able to make it tonight. -corey On Thu, Dec 19, 2024, 15:41 Bill via pacsat-dev <pacsat-dev(a)amsat.org> wrote: > *Pacsat dev mtg 12/19/2024* > Dec 19, 2024, 7:00 – 8:30 PM (America/Chicago) > > > *Please join my meeting from your computer, tablet or smartphone.* > https://meet.goto.com/973605845 > > *You can also dial in using your phone.* > Access Code: 973-605-845 > United States: +1 (872) 240-3212 <+18722403212,,973605845> > > > *Join from a video-conferencing room or system.* > Meeting ID: 973-605-845 > Dial in or type: 67.217.95.2 or inroomlink.goto.com > Or dial directly: 973605845(a)67.217.95.2 or 67.217.95.2##973605845 > > > *Get the app now and be ready when your first meeting starts:* > https://meet.goto.com/install > > ----------------------------------------------------------- > > pacsat-dev mailing list -- pacsat-dev(a)amsat.org > View archives of this mailing list at > https://mailman.amsat.org/hyperkitty/list/pacsat-dev@amsat.org > To unsubscribe send an email to pacsat-dev-leave(a)amsat.org > Manage all of your AMSAT-NA mailing list preferences at > https://mailman.amsat.org >

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Pacsat dev mtg 12/19/2024
by Bill 19 Dec '24

19 Dec '24

*Pacsat dev mtg 12/19/2024* Dec 19, 2024, 7:00 – 8:30 PM (America/Chicago) *Please join my meeting from your computer, tablet or smartphone.* https://meet.goto.com/973605845 *You can also dial in using your phone.* Access Code: 973-605-845 United States: +1 (872) 240-3212 <tel:+18722403212,,973605845> *Join from a video-conferencing room or system.* Meeting ID: 973-605-845 Dial in or type: 67.217.95.2 or inroomlink.goto.com Or dial directly: 973605845(a)67.217.95.2 or 67.217.95.2##973605845 *Get the app now and be ready when your first meeting starts:* https://meet.goto.com/install

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Pacsat dev mtg 12/12/2024
by Bill 12 Dec '24

12 Dec '24

*Pacsat dev mtg 12/12/2024* Dec 12, 2024, 7:00 – 8:30 PM (America/Chicago) *Please join my meeting from your computer, tablet or smartphone.* https://meet.goto.com/354758861 *You can also dial in using your phone.* Access Code: 354-758-861 United States: +1 (571) 317-3112 <tel:+15713173112,,354758861> *Join from a video-conferencing room or system.* Meeting ID: 354-758-861 Dial in or type: 67.217.95.2 or inroomlink.goto.com Or dial directly: 354758861(a)67.217.95.2 or 67.217.95.2##354758861 *Get the app now and be ready when your first meeting starts:* https://meet.goto.com/install

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Re: Pacsat PA Transistor
by Cameron Castillo 10 Dec '24

10 Dec '24

Looks like the datasheet example has a Vdd of 7.5V. Where did you see that it needs 12V? It's very similar to the component we're already using, but it's got a 3% increase in efficiency at 520 MHz which will be better with the lower power output. I wanted to get some different transistors to build up the models I've been playing with. This one is definitely something to look at. Thanks, Cameron ------------------------------------------------- Cameron Castillo KJ7ILB *P*: (503) 752-8877 -------------------------------------------------- On Mon, Dec 9, 2024 at 5:12 PM Jim McCullers via pacsat-dev < pacsat-dev(a)amsat.org> wrote: > Probably not. > > > > Requires 12 volts. > > > > It was late last night when it arrived and I popped the top off. > > Should have looked at the spec longer before hitting the keyboard. > > > > But, hope. > > > > Jim > > WA4CWi > > ----------------------------------------------------------- > > pacsat-dev mailing list -- pacsat-dev(a)amsat.org > View archives of this mailing list at > https://mailman.amsat.org/hyperkitty/list/pacsat-dev@amsat.org > To unsubscribe send an email to pacsat-dev-leave(a)amsat.org > Manage all of your AMSAT-NA mailing list preferences at > https://mailman.amsat.org >

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Re: Pacsat PA Transistor
by Jim McCullers 09 Dec '24

09 Dec '24

Probably not. Requires 12 volts. It was late last night when it arrived and I popped the top off. Should have looked at the spec longer before hitting the keyboard. But, hope. Jim WA4CWi

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Re: Pacsat PA Transistor
by Bill Reed 09 Dec '24

09 Dec '24

Sounds good. Can we test it on a daughterboard? On 12/8/2024 10:31 PM, Jim McCullers via pacsat-dev wrote: > > Found this being used in portable satellite ground station. > > https://www.nxp.com/docs/en/data-sheet/AFT05MS004N.pdf > > 4 watts out $2.50 from Mouser > > > ----------------------------------------------------------- > > pacsat-dev mailing list --pacsat-dev(a)amsat.org > View archives of this mailing list athttps://mailman.amsat.org/hyperkitty/list/pacsat-dev@amsat.org > To unsubscribe send an email topacsat-dev-leave(a)amsat.org > Manage all of your AMSAT-NA mailing list preferences athttps://mailman.amsat.org

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Pacsat PA Transistor
by Jim McCullers 08 Dec '24

08 Dec '24

Found this being used in portable satellite ground station. https://www.nxp.com/docs/en/data-sheet/AFT05MS004N.pdf 4 watts out $2.50 from Mouser

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Re: No meeting tonight
by Jim McCullers 05 Dec '24

05 Dec '24

As we are not having a meeting tonight, at your convenience please review the attached document and comment. I'm attempting to develop pin requirements for the new LaunchPad sub boards. What I have listed is essentially what the current LaunchPad board is doing for the AX5043 plus I2C pins. I'm assuming the CAN bus might be a requirement as well. The current thinking is the sub board would incorporate two ten pin (2.56mm spacing), one at each end for stability and functionality needs. Any thoughts on future projects that could make use of the sub board would be appreciated. Jim McCullers WA4CWI

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No meeting tonight
by Bill 05 Dec '24

05 Dec '24

No meeting on 12-4-2024 Use the pacsat-dev(a)amsat.org mailing list for comments and questions. Sign up for tasks and add tasks you feel are needed: Dec 4, 2024 Task List Ver 1.4 Flight Board Layout Board dimensions Board mounting holes PC104 layout PC104 signal jumpers CAN bus LaunchPad Digital board - Jim Rx board - Jim Tx board - Jim Flight Board Tx Amplifier verification - Cameron Rx Preamp verification - Cameron Power supply mods - Cameron (power cycle) Rx filter verification CAN interface CAN testing Power measurements - add to hdw Flight board test fixture Flight board thermal test Software CAN interface Telemetry interface Documentation Pacsat Concept of Operations - Experiment Requirements doc Pacsat Interface Control Document - Bill User Documentation Training YouTube videos - UND Getting started - Pacsat - Alex & UND Getting started - Ground Station - UND Budgets for 2025 Done, waiting for approval

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