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Messages - RobRich

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1
Amateur Radio / Re: MARS net monitoring question
« on: March 28, 2024, 1932 UTC »
Scroll down at the link I posted, or click this one:

https://www.sigidwiki.com/wiki/MIL-STD-188-110_Serial#Decoding_Software

;)

2
Amateur Radio / Re: MARS net monitoring question
« on: March 28, 2024, 0543 UTC »
I would suspect 110A or similar. I am not big into digital modes, so YMMV.

https://www.sigidwiki.com/wiki/MIL-STD-188-110_Serial

3
~S9 and SIO 544 trending 545 at 0524z via Airspy HF+D and 31' vertical.

BTW, Stereo Tool can generate asymmetrical AM modulation if interested.

4
Carrier in waterfall at 0011z. No discernible modulation. Otherwise, pekies noted nearby at 6950u.

5
2319z - Music. SIO 322. ~S5 peaks via Airspy HF+D and 31' vertical. Considerable static crashing plus an UTE overlapping the transmission, so it a rather rough copy for me at the moment.
2334z - Sounding better here. ~S6 with SIO trending 333.

Thanks for the broadcast! :)

6
Equipment / Re: Best MWDX antenna?
« on: March 27, 2024, 2303 UTC »
Ordered an HFDY loop. I pretty much simply want the amp board, but anyway. ~$30 for an assembled LZ1AQ-based loop is decent IMO.

As noted earlier, the HFDY loop amp lacks a low-pass input filter, has no onboard voltage regulator, and has lower OIP2/OIP3 performance than more expensive LZ1AQ designs.

1. A 30MHz low-pass filter between the loop and amp is not difficult to implement, but I doubt it will be needed at my QTH. I have tested rather large antennas and cheap high-gain preamps without noticed FM overload here.

2. A voltage regular on the amp board is not really required if using a decent power supply. I can do that so whatever IMO.

3. The OIP2/OIP3 is still okay enough for my intended mostly HF purposes. At any rate the OIP3 as measured appears to be around 9dB better than the first-gen NE592-based MLA-30 amp board.

On a tangent related to the MLA-30, I ordered a couple of inexpensive NE592 preamp boards as a starting point for some further experimentation. Basically this in the through-hole version but without the bias tee components:

https://www.pcbway.com/project/shareproject/Antenna_Magnetic_loop_on_video_amplifier_NE592_DIP_version_10ff2fb5.html

They might prove useful enough for later projects after a little work on the input and output sides.

7
10/11 meters / 11m Band Activity 27 MAR 2024
« on: March 27, 2024, 1916 UTC »
Moderate DX acvtivity on 27.555u and similar at ~1910z. Ops from Europe, North Amercica, and South America working DX contacts. Noted prefixes for England, Netherlands, Mexico, Suriname, Venezuela, Wales, etc.

Various French and Spanish languages QSOs on nearby frequencies.

Airspy HF+D and 9' NCLP antenna. There are local storms so my usual verticals are disconnected right now.

8
0205z - Music. SIO 333 . ~S6 via Airspy HF+D and 148' loop-on-ground. Static crashing but a decent copy.
0207z - SSTV then off air.

Thanks for the broadcast! :)

9
0153z - Music. ~6951.665 am. SIO 545. Peaking over S9+10 via Airspy HF+D and 148' loop-on-ground. Some static crashing but an easy copy with wide audio.
0157z - Sternradio ID.
0210z - Sternradio ID and QSL info.
0220z - Sternradio ID.
0242z - Sternradio ID.
0306z - "Transmitter is smoking."
0340z - Sternradio ID.
0410z - "Transmitter is smoking."
0433z - End of broadcast announcement.
0433z - "The Great Seal" anthem.
0435z - Off air.

Thanks for the broadcast! :)

10
0118z- Weird Al. SINPO 55445. S9+ via Airspy HF+D and 148' loop-on-ground. Some static crashing but an overall easy copy with wide ~12.5KHz audio.
0119z - Daft Punk.
0123z - Narrowed the audio.
0124z - Madonna.
0135z - WWWW ID, "wall-to-wall wordwide" and mention of inverted dipole.
0139z - Cheech and Chong. Blind Melon Chitlin'.

Think this could be the first time I have heard or at least logged this particular station.

Thanks for the broadcast! :)

11
Utility / Maritime Net 4027 USB 0015 UTC 26 MAR 2024
« on: March 26, 2024, 0020 UTC »
I assume likely the OCC Caribbean SSB Net. Usual network activity doing calls, check ins, traffic, etc. Multiple operators. Mostly decent to good signals.

Airspy HF+D and 9' NCPL.

12
Carrier at ~6930.075 at 2233z. There is intermittent very faint modulation. Sounds like maybe a couple of people talking in the background.

2234z - Sounds like whistling.
2235z - Off air.

13
2230z - Nothing here on 6962 am, though I do have peskies on 6960 lsb.
....
2250z - Tones. AM then USB.
2252z - Sternradio testing on ~6962.39 am.

Is the transmitter smoking? ;p

14
Music at 0229z. SIO 333. S6+ peaks via Airspy HF+D and 31' vertical. Static crashing and fading but generally copyable.

Thanks for the broadcast! :)

15
0216z - Music. SIO 534. S9+ peaks via Airspy HF+D and 31' vertical. Static crashing and some fading but a decent to good copy.
0219z - Captain Morgan Shortwave ID

Thanks for the broadcast! :)

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