245Mhz Transmitions What is it?

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mm3vee
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245Mhz Transmitions What is it?

Post by mm3vee » 28 Aug 2019, 14:46

Hi all i am getting What sounds like Skip On 245Mhz its all day long could it be satellite transmissions? if so anyone k how i could improve reception.I
am using RSD-DUO with diamond v 2000 antenna

Here is youtube i recorded

https://www.youtube.com/watch?v=QaLwT0BVUJw

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Metradio
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Re: 245Mhz Transmitions What is it?

Post by Metradio » 28 Aug 2019, 15:35

South American illegal radio users - mostly lorry drivers on an open US DOD satellite.. has been going on for a while now..

Mike
Connect Systems CS750 and CS800, Hytera PD-365, Motorola DP4600.
Raspberry Pi 2 and DV4Mini HotSpot.
AOR AR-DV1 Digital Voice Receiver / eSPY on ARD V1.

Whistler WS1088 / TRX-1 / Whistler Q / UBCD3600XLT / WTR Browser.

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ch25
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Re: 245Mhz Transmitions What is it?

Post by ch25 » 28 Aug 2019, 15:56

Satcom pirates.
To improve signal you need proper antenna: https://www.thingiverse.com/thing:388651
http://www.blackcatsystems.com/radio/sa ... tenna.html
Chris
You can't have too many antennas...

grafter
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Re: 245Mhz Transmitions What is it?

Post by grafter » 28 Aug 2019, 16:27

Proper is good but it's overkill to listen to Satcom. Much easier to knock up a quick NBS yagi, it'll be 3dB down on circular which is nothing to worry about.
my friend grafter, seems like you are using a very offensive tone in the reply.

mm3vee
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Re: 245Mhz Transmitions What is it?

Post by mm3vee » 28 Aug 2019, 16:33

thanks, guys...
Any antennas i can buy cheap instead of building a kit?

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Metradio
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Re: 245Mhz Transmitions What is it?

Post by Metradio » 28 Aug 2019, 18:36

Then you will have to learn Spanish ...

Mike
Connect Systems CS750 and CS800, Hytera PD-365, Motorola DP4600.
Raspberry Pi 2 and DV4Mini HotSpot.
AOR AR-DV1 Digital Voice Receiver / eSPY on ARD V1.

Whistler WS1088 / TRX-1 / Whistler Q / UBCD3600XLT / WTR Browser.

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Andy
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Re: 245Mhz Transmitions What is it?

Post by Andy » 30 Aug 2019, 10:40

I use a DAB folded dipole from B&Q. It seems to work best horizontally, but there's not a lot in it. The transmissions can pop up almost randomly between about 245 and 256 MHz, so it's worth tuning about. There are some satellite transponder 'stripes' around 244.2 and 249.2 as well, which you should see if you are using an SDR.
Last edited by Andy on 30 Aug 2019, 10:48, edited 1 time in total.
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Re: 245Mhz Transmitions What is it?

Post by Andy » 30 Aug 2019, 10:47

stripes 1.jpg
Stripes today on 244 MHz.
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radiosification
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Re: 245Mhz Transmitions What is it?

Post by radiosification » 31 Aug 2019, 11:33

Metradio wrote:
28 Aug 2019, 18:36
Then you will have to learn Spanish ...

Mike
I think most of the pirates on satcom speak Portuguese actually. At least in the recordings I've seen
If you're interested in digital voice, check out my YouTube channel:
http://www.youtube.com/radiosification

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Re: 245Mhz Transmitions What is it?

Post by Metradio » 31 Aug 2019, 16:17

Portuguese - Spanish with a Welsh accent :D

Mike
Connect Systems CS750 and CS800, Hytera PD-365, Motorola DP4600.
Raspberry Pi 2 and DV4Mini HotSpot.
AOR AR-DV1 Digital Voice Receiver / eSPY on ARD V1.

Whistler WS1088 / TRX-1 / Whistler Q / UBCD3600XLT / WTR Browser.

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