Messages

211

VHF/UHF Logs, including satellites and radiosondes / Re: Brazilian Pirates 263.580 FM SATCOM 1456 UTC 21 NOV 2022

« on: November 21, 2022, 1801 UTC »

Good catch on the discone. Those 225-400 MHz line-of-sight (LOS) SATCOM satellites are circular polarized, Right Hand Circular (RHC) to be exact, vise the normal linear polarization.

Thanks Sigint! I wanted folks to know how easy it is to receive interesting UHF satcom signals on just a discone.

I've mainly posted about HF pirate beacons and HF military comms but I'm a long time UHF satcom listener. I have a pretty nice collection of RHCP antennas and access to others when needed. I also have some classic original satcom documents I used way back when.

Original USN Satcom book


My Precious :-)  a D&M C-120


The "Stick Man", a Navy AS-2815/SSR-1 with the AM-6534/SSR-1 AMPLIFIER CONVERTER (not shown)
It was one of four RHCP omi antennas for a shipboard Fleet Satellite Broadcast Message receive-only system. I need to figure out how to mount it up on a tile roof...


I also have a rather large military UHF cross pol yagi new in the transit case. Hard to get to for a picture. It's either Dorne & Margolin or Trivec Avant. Another hard to dig out antenna is a set of cross polarized UHF log periodic yagi antennas in a gray fiberglass radome.I've built a few RHCP antennas from scratch when needed.

I'm UHF satcom lurker AND a great admirer of all that you have posted!




 

212

VHF/UHF Logs, including satellites and radiosondes / 263.580 FM

« on: November 21, 2022, 1454 UTC »

Brazilian Portuguese language pirates., active now 1456 UTC. Using a borrowed R8600 on a discone, Orange County Calif.

213

HF Beacons / Re: Teotwaki's Morning Beacon Log

« on: November 21, 2022, 1433 UTC »

4095.650 KHz   DW. Great signal.  BAT 12.7 oTMP 48 iTMP 50  PV 18
4109.4     KHz   Coast Slider, weak but readable
7039.300 KHz   Russian K beacon, quite strong
7039.400 KHz   Russian M beacon, very faint

214

HF Mystery Signals / Re: Unknown 40 meter signal group

« on: November 20, 2022, 1653 UTC »

Looking at that frequency range at 1540 z I see several signals between 7900 and 8030.

There are some fast CODAR between about 7900 and 7980.  On 8000 there is (what is probably) a North Korean pulse jammer, it sounds like one, but if it is, what it is trying to hit on that freq I have no idea.  And between 8000 and 8015 is a Chinese radar.

Without recordings and / or screen shots we may not know what you heard.

T!

It's still on the air  http://69.27.184.58:8073/, have a listen at 7998.5 in CWN .....

along with other shorter term stuff, left side of the screen shot

215

HF Beacons / Re: Teotwaki's Morning Beacon Log

« on: November 20, 2022, 1519 UTC »

4095.650 KHz   DW. Fair signal with deep fades   BAT 14.0 oTMP 45 iTMP 50  PV 1067
4109.4     KHz   Coast Slider, weak and fading
7039.300 KHz   Russian K beacon, fair
7039.400 KHz   Russian M beacon, weak

216

HF Mystery Signals / Unknown 40 meter signal group

« on: November 20, 2022, 1505 UTC »

I started out hearing what I thought was some sort of single frequency fast dasher beacon here at home

1.  7900 to 8020 - (kHz)
2.  1450 (UTC)
3.  ongoing
4.  CW
5.  Orange County, CA
6.  Narrow fast pulses

Looking at the KFS Omni I see this thing blanketing the spectrum with parallel signals above and below 8 MHz.

Radar?

217

HF Beacons / Re: The Desert Whooper

« on: November 18, 2022, 1423 UTC »

With shorter daylight hours I've logged DW's battery voltage trending to 12.7 volts in the hour before sunrise. I've also seen the PV numbers peaking above 2 Amps.

218

HF Beacons / Re: Teotwaki's Morning Beacon Log

« on: November 18, 2022, 1410 UTC »

2097.310 KHz   The A beacon! Fair signal. So nice it is back to stay.
4095.650 KHz   DW. Good signal. Telemetry    BAT 12.7   oTMP 49   iTMP 52   PV 2
7039.400 KHz   Russian M beacon, fair

219

HF Beacons / Re: Teotwaki's Morning Beacon Log

« on: November 15, 2022, 1452 UTC »

2097.310 KHz   The A beacon! Weak but clear
4095.650 KHz   DW. Fair signal with deep fades   BAT 13.0 oTMP 48 iTMP 52  PV 1122
4109.360 KHz   Coast Slider is weak but clear
7039.300 KHz   Russian K beacon, very strong here

220

HF Beacons / Re: Teotwaki's Afternoon Beacon Log

« on: November 12, 2022, 2355 UTC »

4095.65 KHz  Desert Whooper, 150 Hz whoop, telemetry BAT 13.2  oTMP  60  iTMP 66  PV  75 weak sig  at home, blastin' KFS
4095.84 KHz  Drifting dasher, poor frequency stability, good sig  heard on KFS
4096.2   KHz  Buddha, heard on KFS
4097.28 KHz  Fast dasher, good sig, heard on KFS
4109.35 KHz  Coast Slider, slow 400 Hz wide whoop, great sig heard on KFS, weak at home

221

HF Beacons / Re: New whooper beacon on 4095.65

« on: November 08, 2022, 0438 UTC »

Looking over my notes it seems that DW was getting weak around the 3rd week of September. Now it is great copy at home, even can be heard on the NRD-525 with an untuned, RX-only antenna.

222

HF Beacons / Re: The Desert Whooper

« on: November 08, 2022, 0254 UTC »

My error on the time!! Your beacon first heard a 2300Z with 569-589.

You should see if you are able to edit your own posts so as to not have to post again. Also, unless I have received a beacon at a substantially different time I just let the time stamp on the message serve as the defining time.

Thanks for being a member and sharing your reception reports!

223

HF Beacons / Re: The Desert Whooper

« on: November 07, 2022, 0506 UTC »

Signal strength seems to be normal for the last four or five hours. Currently S8 on KFS SE

Bat 13.0
OTMP 65
iTMP 72
PV 1

224

HF Beacons / Re: The Desert Whooper

« on: November 02, 2022, 0425 UTC »

I’ve also had trouble receiving it at home. Just happened to check KFS Omni and had it at S7 at 18:21 pst

Bat 13.1
OTMP 64
iTMP 74
PV 1

225

HF Beacons / Re: HIKER

« on: October 19, 2022, 1348 UTC »

Earlier this morning I picked up Hiker/Shorty here at home and it was happily beeping away for maybe an hour and now it has transitioned to series of long dashes and long spaces, maybe 3-4 sec each.