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Author Topic: Mixed CW / FSK beacon(?) on 4095.38  (Read 411 times)

Offline circuitmike

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Mixed CW / FSK beacon(?) on 4095.38
« on: February 27, 2023, 0241 UTC »
I'm not sure if this is a beacon or something else, but I'm hearing a faint signal on and around 4095.38 that transmits CW for a while, then switches to FSK for a bit, then some silence, and repeat. It's too faint and my CW skills are too crappy for me to decode what's being transmitted. Anyone know what this is?
QTH: Western Massachusetts (FN32rp)
Receiver: KiwiSDR (on-site)
Antenna: Wellbrook ALA-1530LN loop

Offline circuitmike

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Re: Mixed CW / FSK beacon(?) on 4095.38
« Reply #1 on: February 27, 2023, 0308 UTC »
OK, I think I got all excited about nothing. I've tried a bunch of KiwiSDRs and the signal is roughly equally weak all up and down the east coast. It's much stronger in Europe - I got a great signal in Finland. I'd still love to know what it is, but it's probably not a beacon.
QTH: Western Massachusetts (FN32rp)
Receiver: KiwiSDR (on-site)
Antenna: Wellbrook ALA-1530LN loop

Offline syfr

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Re: Mixed CW / FSK beacon(?) on 4095.38
« Reply #2 on: February 28, 2023, 0038 UTC »
Good copy on this Fin Kiwi- Seems to be weather in morse.

http://sdxl-loh.ddns.net:8073/?f=4095.378cwnz14

Some fading but it does identify as a beacon and it's sending the time and shift and baud rate of RTTY info in its preamble.  It's machine sent code but cadence is odd to my ear.

« Last Edit: February 28, 2023, 0043 UTC by syfr »
Kiwsdr x 2. TenTec Paragon/NRD535

Offline minorukun

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Re: Mixed CW / FSK beacon(?) on 4095.38
« Reply #3 on: February 28, 2023, 0047 UTC »
it is Common And Precious beacon

FSK decode 2023-02-28 0055 UTC:
Quote
PYRYRYRYRY

COMMON AND PRECIOUS BEACON - 2ND GENERATION (SOFTWARE 1.0 BETW).
CW AND RTTY (170HZ SHIFT 50 BAUD 2 STOP BITS).
BASE LOADED 5M VERTICAL WITH CAPACITY HAT, 35M ABOVE GROUND.
50W RF, LOCATED IN JO62.
24/7 OPERATION.
UBATT: (GRID)
TEMPERATURE:   1.0C
HUMIDITY: '6.5RH
MESSAGE END

it have around 135Hz shift, not 170 as stated in the message
« Last Edit: February 28, 2023, 0104 UTC by minorukun »

Offline circuitmike

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Re: Mixed CW / FSK beacon(?) on 4095.38
« Reply #4 on: February 28, 2023, 1501 UTC »
Very cool, thanks! I thought the FSK shift seemed weirdly narrow.
QTH: Western Massachusetts (FN32rp)
Receiver: KiwiSDR (on-site)
Antenna: Wellbrook ALA-1530LN loop

 

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