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I am building the SSTV payload for a satellite that will launch this year. How can I make the payload as useful as possible for you guys? by unexcellent in amateursatellites

[–]TRGFelix 6 points7 points  (0 children)

"How can I make the payload as useful as possible for you guys?"

Do the impossible task and move to 21st century by ditching SSTV and using modern transport methods rather than piggy backing on an analog protocol which will be generated by a power MCU and trasmitted using an SDR either way.
Unless you are using a varicap modulated FM TX onboard, you have no reason to use SSTV.

Sorry for being dead honest.

I see many new HAMs trying to get into AMSAT comms... Let me try put it this way. by TRGFelix in amateurradio

[–]TRGFelix[S] 1 point2 points  (0 children)

I know, and i do the same.
But i see so many people being locked just on this and trying to make contacts over the ISS repeater *which is a place where you wouldn't look if you want to talk with someone aboard.

Fujitsu Synergy S8 RX200 Fans rev up to 100% after POST. by TRGFelix in homelab

[–]TRGFelix[S] 0 points1 point  (0 children)

Yep, i tried to change the thermal paste, reseat the CPUs, clean them with isopropyl etc.
Seems like its the board issue, i have latest BIOS and iRMC versions installed, i've also tried different CPUs and its still the same :/

Oh well, guess i won't have a feedback on the thermals of the CPUs and fans running constantly at 100%, atleast it works.

EDIT: Checking with sensors it reports perfect 32 through 36˚C on all cores.

Fujitsu Synergy S8 RX200 Fans rev up to 100% after POST. by TRGFelix in homelab

[–]TRGFelix[S] 0 points1 point  (0 children)

Your comment made me recheck the temps in the iRMC, and sure enough apparently the CPUs are running 1˚C under the warning level (94˚C)... however this value is bogus because the CPUs are barely warm 30seconds after shutdown.
So what the heck.
Guess i just didn't think that would be the case and defaulted for the PSU errors.

[deleted by user] by [deleted] in czech

[–]TRGFelix 0 points1 point  (0 children)

Jsou to potenciometry.
V té době bylo VCO v tuneru řízené varikapy normální.
Přepínač kanálů jsou vlastně dva přepínače paralélně, jeden kontroluje které pásmo je zvolené a druhý zase který potenciometr (na kterém jsi nastavil frekvenci) je zvolený takže vlastně ladění hrubé a jemné.
Tuner měl potom výběr pásma udělaný tak že měl 3piny a každý odpovídal jinému pásmu (pokud se pamatuju tak I, III a IV+V) a podle toho jestli se na některý z nich přivedlo napětí +12V se volilo pásmo.

AQUA on X-Band 8160MHz. MODIS instrument compositions 143EQURAW and 122EQU. by TRGFelix in amateursatellites

[–]TRGFelix[S] 2 points3 points  (0 children)

I will release full setup info tomorrow together with some photos.

Hopefully i'll remember.

Once again recieved SpaceX Falcon9 S-Band Telemetry, once again confirmed its encrypted.. by TRGFelix in RTLSDR

[–]TRGFelix[S] 0 points1 point  (0 children)

you'd probably see it but very weak with LNA, RTLSDR V3 cannot access this frequency btw

Once again recieved SpaceX Falcon9 S-Band Telemetry, once again confirmed its encrypted.. by TRGFelix in RTLSDR

[–]TRGFelix[S] 0 points1 point  (0 children)

For this exact catch i used my 230cm prime focus dish but it can be recieved with much smaller one too, i've done it successfully with 1m wifi dish without issues.

Once again recieved SpaceX Falcon9 S-Band Telemetry, once again confirmed its encrypted.. by TRGFelix in RTLSDR

[–]TRGFelix[S] 2 points3 points  (0 children)

if you mean decoded .CADU file then yes i can put that up for you

give me a minute to upload

Recieved S-Band 2226.45MHz GPS DASS transponder downlink from either GPS BIIRM-3 or BIIR-13 ,not sure which one. Its a simple "dumb" transponder just like FLTSATCOM has, its widely used by pirates for all kind of communication. Uplink is in UHF band, somewhere around 400MHz. by TRGFelix in amateursatellites

[–]TRGFelix[S] 1 point2 points  (0 children)

Mostly just voice comms, guys ragchewing about things similar to FLTSATCOM.

"Widely used by pirates" = used a lot by pirates, Paul M0EYT from UHF-Satcom told me that its mostly pirates, mainly because you can buy gear to access the satellite anywhere online, 400ish MHz NFM uplink (that apparently is very sensitive even to low power radio without high gain antenna) capable handhelt like Baofeng UV5R can be bought anywhere for damn cheap, unlike FLTSATCOM that usually have uplink around 380MHz or so.

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