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Messages - R4002

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391
During ducting events the NOAA weather radio channels can get pretty crazy.  I’ve logged stations hundreds of miles away during very good band conditions. 

They’re de facto VHF beacons.  The only issue is the transmitters don’t all transmit the same output power, have the same antenna directionality or elevation...but all the info (including coverage maps, transmitter output power, etc.) can be found on the NOAA Weather Radio homepage. 

392
10/11 meters / Re: 11 meter private comms?
« on: February 13, 2020, 2150 UTC »
Exactly.  There’s a couple of these data link networks that send a packet every 2-3 seconds and it can get extremely annoying...it’s usually just strong enough of a signal to open the squelch (when listening to CSQ or carrier squelch mode of course). 

With 2 watts some of these systems actually get some impressive range.  Their antennas must be quite elevated. I’m in an urban area - the presumption is the more consistent data bursts on coming from a system with at least one antenna on top of a building somewhere.

393
10/11 meters / Re: 27.555
« on: February 13, 2020, 2145 UTC »
Ahhh yes.  Reminds me of “Radio Blue Waffle” and “Number 3 Repeater” on 27.385 LSB and 27.555 USB just yakking away for hours.

Oh, and then there’s this guy:

https://youtu.be/h0HxYBGvD9g

Apparently he got The Knock eventually....

394
Peskies / Re: New England Fishermen 6263.5 USB 2005 UTC 12 Feb 2020
« on: February 13, 2020, 1446 UTC »
The Maine Based Bahstads Strike Again? 

395
Utility / Re: English EU network 6301 USB 2238 UTC 10 Feb 2020
« on: February 13, 2020, 1445 UTC »
...
I don't know if these were theirs or strangers ride on the channel + / _ 2kHz carrier.
...

What do you mean exactly?  Carriers were popping up +/- 2 kHz from the 6301 kHz center frequency?  That would make sense if they're tuning up transmitters, tuning antennas, etc. 

396
Could be cops doing a stakeout.

They're partial to UHF and 700/800 MHz  - plus now their 800 MHz trunking system is 100% encrypted.  Prior to the switch over to 100% encryption I could hear all the "tac" talkgroups (channels) - which were (and probably still are) heavily used as "party line" channels for various task forces, generally associated with narcotics and vice cops, often with informal CB-like chatter and very personal information being shared over the air.  One time they had a patch from what sounded like an analog wire or surveillance feed re-transmitted over one of these tac channels so that the "roving" officers outside the short range of the wire/bug could hear the audio. 

There's a massive demolition project going on in the downtown area, with several contractors and subcontractors involved...I caught a glimpse of one of the radios being used and it had a distinctively VHF antenna.  Compared to most on-site construction radios (which are UHF) it was noticeable.  I was driving by and didn't get that good of a look at the radio but it was a Motorola and probably a MotoTRBO model, which would explain the DMR traffic heard on 151.625 MHz.

One of the subcontractors ( https://www.radioreference.com/apps/db/?fccCallsign=WPNU205 )  uses 151.6250 in addition to 151.5050, 151.5125, 158.4000 and 158.4075.  They use 151.625 as their truck-to-truck channel, with very high power mobiles.  They use analog only though. 


397
10/11 meters / Re: Man without a life....
« on: February 13, 2020, 1426 UTC »
There was a guy in the Omaha/Counciltucky region with a lot of spurs that went to the air band as well as keying up 2m repeaters. This is the late 80s or so. So the local HAMs got together and found him, turned him in to fcc after he refused to do something about his radio hygiene with gentle HAM persuasion, and the fedz took care of the issue. He was one of those guys with a suburban that had a 10kw cb in it and a 11m antenna with a coil like a car coil spring. Now those guys are all over.

Bonus points if he was using a DAVE MADE amplifier.  The massive coil antennas + 10s of kilowatts CB crowd can be found driving beat up old Cadillacs (at least in my area) as well as Suburbans and various pickups.   Those huge coil antennas can be found on regular semi trucks too - no doubt because the truck has a very high power CB setup installed. 

http://www.davemade.mobi/



I remember talking to one of the local CBers (face to face, I ran into him at a hamfest, go figure) about one of the more infamous local AM CB guys - apparently there was another operator who had a similar set up - peeked and tooned radio with modulation limiter removed, power mic and several amplifiers without any sort of LPF or filtering of any kind employed.  He spewed spurs all over 10 meters and harmonics into the VHF aircraft band.  The 4th harmonic happened to land right on one of the VOR radio navigation frequencies used by the local airport. Needless to say, he got "the knock" pretty quick. 


398
10/11 meters / Re: 27.555
« on: February 13, 2020, 1423 UTC »
I've heard about the 27.555 MHz USB jammers in Europe and the UK as well.  I've never actually heard them myself during band openings to Europe, even when the band is very open to the UK/Ireland area and I can hear UK FM CB activity (and even work UK stations on the UK FM channels when the band is really open!) 

26.285 MHz USB is certainly an option for alternate calling frequency.  26 MHz is popular in Poland and elsewhere.  Here in the Americas, 26.555 MHz LSB, 26.225 MHz USB, 26.230 MHz USB, 26.235 MHz USB and 26.500 MHz LSB are popular SSB calling frequencies for Spanish speaking stations on 26 MHz.  There are numerous 27 MHz SSB calling frequencies for Spanish speaking stations, 27.455 MHz USB being the big one. 

26.285 MHz is channel 19 "down two bands" (see also: 26.735 MHz, 27.635 MHz and 25.835 MHz).  In the US, it is common for trucking companies, logging companies, etc. to use 6-band export radios and flip the band switch up and down from channel 19 to access a "clear channel" or even a "company channel".  I have heard trucking company chatter on 25.835 MHz, 26.285 MHz, 26.735 MHz and 27.635 MHz when the band is open, all in AM mode.  There appears to be a local or local-ish logging company that uses 25.835 MHz (channel 19 on Band A) for truck-to-truck comms as well.  The lower channels upper part of the 25 MHz band and the 26 MHz band is also popular with hunting clubs and other users in the USA and taxi cab dispatchers in Latin America.  I know that European 11m operators have had to deal with the QRM from Russian taxi dispatchers when the band is open, Americans have similar issues with Latin American taxis.  The Spanish speaking taxi dispatchers almost exclusively use AM mode though, compared to the FM mode used by the Russians.

Other than that, 26.285 USB could certainly be used.  27.555 USB is just a lot more well-known, especially in the USA.  Same with 27.385 LSB.

399
10/11 meters / Re: 11 meter private comms?
« on: February 13, 2020, 1415 UTC »
45auto,

Yep, the data bursts on MURS could be any number of things.  In my area, there are several telemetry systems that use the MURS channels.  They appear be related to industrial sites located 1-2 miles away.  I know that dog collars and hunting dog tracking systems use the MURS channels as do the driveway alert and security alert systems.  There are numerous other systems that use the MURS channels.  Luckily, you will be able to program in a CTCSS or DCS tone/code for your radios and those will filter out the annoying interference. 

I sent you a PM as well with more detailed information on how to implement CTCSS to eliminate the interference on the MURS frequencies as well as other detailed information for your purposes. 

400
Around 12:30 PM local time, receiving equipment is a TYT TH-9000D VHF mobile transceiver with a Browning BR-168-BS 1/2 wave VHF antenna with a Chevrolet sedan ground plane.  Tuned to 151.6250 MHz listening to two different users running analog FM (narrow FM, NFM, NBFM) 11 kHz bandwidth analog voice, one of the users appeared to be a construction crew and the other sounded like surveyors.  A strong DMR signal (full scale) obliterated the analog traffic on frequency for several seconds at a time.  I've noticed multiple analog users of the VHF itinerant business frequencies, but 151.625 MHz is the only one I've heard DMR digital voice on.  It's not P25, but DMR aka Motorola TRBO or MotoTRBO.

VHF itinerants:

151.5050 MHz
151.5125 MHz
151.6250 MHz
151.7000 MHz
151.7600 MHz
154.5275 MHz
158.4000 MHz
158.4075 MHz

151.625 is by far the most popular of the eight frequencies.  If you include the five license-free MURS channels 151.820 MHz, 151.880 MHz, 151.940 MHz, 154.570 MHz and 154.600 MHz along with 151.955 MHz (which isn't technically an itinerant channel), the number of monitoring targets increases significantly. 

401
10/11 meters / Re: Man without a life....
« on: February 12, 2020, 1155 UTC »
https://m.youtube.com/watch?v=wCnHh_jhP-Q

A good example of somebody with a big antenna up on top of a high rise with an amplifier....smoking crack and drinking malt liquor and talking basically non-stop on the CB radio.  Luckily there’s other channels to choose from. 

When I recorded that video I was about 3-4 miles away from the louder station.  I could hear him with a handheld CB inside the house on the crappy stock rubber duck antenna without a problem too.  When he turns his amplifier on he can be heard a couple channels up and down from whichever channel he’s on.  So channel 21 and channel 24 would also be useless, at least locally.

Who needs a modulation limiter anyway?

402
10/11 meters / Re: 11 meter private comms?
« on: February 12, 2020, 1149 UTC »
Make sure you get high quality antennas to use with your TYT TH-9000D radios as well.  I use a Browning BR-168-S (the all-black version which is the BR-168-B-S) 1/2 wave mobile antenna.  It provides broadband performance across the VHF band.  I also have a couple 5/8 wave mobile antennas...but with the 5/8 wave you MUST tune and cut the antenna for the frequency you intend to use.  1/2 wave and 1/4 wave antennas tend to give much better out-of-the-box SWR.  5/8 wave antennas will give you more gain compared to the 1/2 wave antenna but you WILL need to get a decent quality VHF or VHF/UHF SWR meter and cut the whip accordingly. 

The 1/2 wave antenna like the BR-168 gives 2.4db gain (compared to the 3db gain the 5/8 wave gives you) without as much tuning hassle. 

I recommend using a trunk lip mount antenna if possible.  Magnetic mount antennas work well too, but a more permanent mount is more durable and will generally provide better performance.  An antenna mounted on the roof of your vehicle will work better than a fender or trunk or hood mount.  Which types of vehicles will you be installing the TH-9000D radios in? 

403
10/11 meters / Re: 11 meter private comms?
« on: February 11, 2020, 2218 UTC »
The TH-9000D is the same VHF rig I have in my car.  MURS is great.  The TH-9000D also offers voice inversion scrambling.  Program the MURS frequencies in with scrambling and then without scrambling. 

Also, since you're planning on using MURS, I would program the five MURS frequencies in with a CTCSS (PL) or DCS (DPL) tone for transmit and receive.  There are data link or telemetry systems that use the MURS frequencies and will cause an annoying "crunch" sound every time they send a data burst...and that can get very annoying.  Using CTCSS or DCS will eliminate the interference from those telemetry systems.  Remember to program the MURS channels (and everything else - except the NOAA weather channels) in 12K bandwidth mode. Program the NOAA channels in 20K bandwidth mode or 25K bandwidth mode. 

I recommend using CTCSS that isn't the default 67.0 Hz, 74.4 Hz, 77.0 Hz, 88.5 Hz, 100.0 Hz or 136.5 Hz tones.  Don't use DCS 023 either as that appear to be default ones.  Wal-Mart tends to use 67.0 Hz, 74.4 Hz, 77.0 Hz and 136.5 Hz CTCSS tones.  Other CTCSS and DCS tones/codes to avoid using include 85.4 Hz, 79.7 Hz, DCS 074, DCS 174, DCS 743 and DCS 754. 

 Your best bet is to use a CTCSS tone like 110.9 Hz, 114.8 Hz, 156.7 Hz, 162.2 Hz, 167.9 Hz, 192.8 Hz, 203.5 Hz, 210.7 Hz, 225.7 Hz, etc. or a random DCS code.  A channel plan could look like this:


CH 01 - 151.8200 MHz [TX CTCSS: 156.7 Hz] [RX CTCSS: 156.7 Hz] - Scrambler Mode 2
CH 02 - 151.8800 MHz [TX CTCSS: 156.7 Hz] [RX CTCSS: 156.7 Hz] - Scrambler Mode 4
CH 03 - 151.9400 MHz [TX CTCSS: 156.7 Hz] [RX CTCSS: 156.7 Hz] - Scrambler Mode 6
CH 04 - 154.5700 MHz [TX CTCSS: 156.7 Hz] [RX CTCSS: 156.7 Hz] - Scrambler Mode 3
CH 05 - 154.6000 MHz [TX CTCSS: 156.7 Hz] [RX CTCSS: 156.7 Hz] - Scrambler Mode 5

CH 06 - 151.8200 MHz [TX CTCSS: 156.7 Hz] [RX CTCSS: 156.7 Hz] - Scrambler OFF
CH 07 - 151.8800 MHz [TX CTCSS: 156.7 Hz] [RX CTCSS: 156.7 Hz] - Scrambler OFF
CH 08 - 151.9400 MHz [TX CTCSS: 156.7 Hz] [RX CTCSS: 156.7 Hz] - Scrambler OFF
CH 09 - 154.5700 MHz [TX CTCSS: 156.7 Hz] [RX CTCSS: 156.7 Hz] - Scrambler OFF
CH 10 - 154.6000 MHz [TX CTCSS: 156.7 Hz] [RX CTCSS: 156.7 Hz] - Scrambler OFF

CH 11 - 151.8200 MHz [TX CTCSS: 156.7 Hz] [RX CTCSS: OFF] - Scrambler OFF
CH 12 - 151.8800 MHz [TX CTCSS: 156.7 Hz] [RX CTCSS: OFF] - Scrambler OFF
CH 13 - 151.9400 MHz [TX CTCSS: 156.7 Hz] [RX CTCSS: OFF] - Scrambler OFF
CH 14 - 154.5700 MHz [TX CTCSS: 156.7 Hz] [RX CTCSS: OFF] - Scrambler OFF
CH 15 - 154.6000 MHz [TX CTCSS: 156.7 Hz] [RX CTCSS: OFF] - Scrambler OFF



The TH-9000D series of radios have 8 different scrambler settings (OFF, 1, 2, 3, 4, 5, 6, 7, 8 and UDF).  UDF is "user-defined" and defaults to the same as OFF or unscrambled clear transmissions.  Make sure both radios are set for the same scrambler mode (you can choose whichever one you want, and you could use a different setting for each channel to increase security).  It is important to program the MURS channels in without scrambling turned on - especially in a SHTF situation, you will want to, at the very least, monitor other MURS radio chatter in the area. 

As far as the CTCSS / DCS settings go - you can use whichever one you like, just avoid the common ones I listed in the previous paragraphs - and make sure that both radios are programmed for the same CTCSS or DCS code for a given channel.  You don't have to use the same CTCSS or DCS tones/codes for each channel, you can mix it up.  CTCSS and DCS do not provide any sort of privacy.  They simply reduce interference by ignoring all transmissions that do not have the same CTCSS or DCS code that your radio is set in the receive mode for. 

You could then program in the other VHF business band frequencies, the public safety frequencies and the 7 NOAA Weather frequencies in as you desire.  The TH-9000D has 200 channels which is more than enough for your purposes. 

You may also want to consider programming the MURS channels in with the power output set to LOW and then programming them in with the power set to HIGH.  Low power mode reduces your chance of interception by a distant receiver and for car-to-car communications the 10 watt low power setting usually works just fine.  In my experience with the TH-9000D (I have owned and do currently own several of them) is that the low power setting is generally 8-12 watts, medium power is around 25-27 watts and high power is 65-70 watts.  These minor variations make very little real-world difference.  However, if your wife is only a mile or two away from you, you don't need to be transmitting 70 watts to talk to her.  Use high power when maximum range is required. 


Make sure you set the radio to 12K bandwidth mode (narrowband FM) when you program the TH-9000 radios.  They default out of the box to 20K or 25K which are both wideband FM settings.   

Program the MURS frequencies in as well as the VHF business band itinerant frequencies and the VHF public safety interoperability channels.  Those are good for monitoring in an emergency as well.  Everything except for the NOAA Weather Channels and 2 meter ham frequencies (do NOT use 2 meters if you don't have a ham license) should be in narrowband (12K or 12 kHz) mode.   The VHF interoperability channels should be programmed in CSQ or carrier squelch receive, same with the business band frequencies.  Stick with MURS for your purposes - the other channels are good for monitoring other preppers/users in your area. 


VHF Business / Prepper / Militia / Patriot VHF High Band
    151.6250 MHz - Militia/Patriot VHF BUSINESS RED DOT 1
    151.9550 MHz - Militia/Patriot VHF BUSINESS PURPLE DOT 2
    152.8850 MHz - Militia/Patriot VHF BUSINESS 3
    152.9150 MHz - Militia/Patriot VHF BUSINESS 4
    151.7000 MHz - Militia/Patriot VHF BUSINESS 5
    151.7600 MHz - Militia/Patriot VHF BUSINESS 6
    151.9250 MHz - Militia/Patriot VHF BUSINESS 7
    151.8350 MHz - Militia/Patriot VHF BUSINESS 8
    151.8050 MHz - Militia/Patriot VHF BUSINESS 9
    151.5125 MHz - Militia/Patriot VHF BUSINESS 10
    151.6550 MHz - Militia/Patriot VHF BUSINESS 11
    151.6850 MHz - Militia/Patriot VHF BUSINESS 12
    151.7150 MHz - Militia/Patriot VHF BUSINESS 13
    151.7450 MHz - Militia/Patriot VHF BUSINESS 14
    151.7750 MHz - Militia/Patriot VHF BUSINESS 15
    151.8650 MHz - Militia/Patriot VHF BUSINESS 16
    151.8950 MHz - Militia/Patriot VHF BUSINESS 17
    151.9250 MHz - Militia/Patriot VHF BUSINESS 18
    151.5050 MHz - Militia/Patriot VHF BUSINESS 19
    154.4900 MHz - Militia/Patriot VHF BUSINESS 20
    154.5150 MHz - Militia/Patriot VHF BUSINESS 21
    154.5275 MHz - Militia/Patriot VHF BUSINESS 22
    154.5400 MHz - Militia/Patriot VHF BUSINESS 23
    153.0050 MHz - Militia/Patriot VHF BUSINESS 24
    154.6550 MHz - Militia/Patriot VHF BUSINESS 25
    158.4000 MHz - Militia/Patriot VHF BUSINESS 26
    158.4075 MHz - Militia/Patriot VHF BUSINESS 27

The MURS frequencies are also included in the channel plan above, I omitted them since you're going to be programming them in anyway.  MURS 3 is generally considered to be the "primary" or "calling" frequency. 


Since you're in New York, you should also program in these New York state specific frequencies (again, for monitoring/listening purposes)

154.6950 MHz - New York State Police Statewide Emergency/Broadcasts Channel
154.6650 MHz - New York State Police Car-to-Car
155.3700 MHz - New York Statewide Public Safety interop (included below with interop frequencies)

https://www.radioreference.com/apps/db/?aid=615 - for the NYSP frequencies - I would include the ones local to you as well as the ones surrounding you.

VHF Public Safety Interoperability

155.7525 MHz - VCALL10 - Public Safety VHF Calling
151.1375 MHz - VTAC11/VTAC36 - Public Safety VHF Operations
154.4525 MHz - VTAC12/VTAC37 - Public Safety VHF Operations
158.7375 MHz - VTAC13/VTAC38 - Public Safety VHF Operations
159.4725 MHz - VTAC14/VTAC39 - Public Safety VHF Operations
155.3700 MHz - Law Enforcement Intersystem - often called "INTERCITY"
155.4750 MHz - VLAW31 - Nationwide VHF Law Enforcement Interoperability
155.3400 MHz - VMED28 a.k.a. "HEAR" "HEAR340" - Hospital/EMS/Medical Interop
154.2800 MHz - VFIRE21 - Fire Interop
154.2650 MHz - VFIRE22 - Fire Interop
154.2950 MHz - VFIRE23 - Fire Interop

404
10/11 meters / Re: Man without a life....
« on: February 11, 2020, 2158 UTC »
Unfortunately these types - that is, channel hogs, quasi-jammers, etc.  are all over the place on CB.  In my area, they haven't discovered FRS/GMRS or MURS.  There's only a handful of really bad ones...one of the guys has a similar setup - a high gain antenna on top of an apartment complex with a commanding view of the downtown area.  He runs at least two different amplifiers and a Galaxy 33 (from the sound of it, with the modulation limiter removed). 

He smokes crack and talks on the CB all day long.  Some of the locals/regulars are cool with him, but he will antagonize people for hours on end.  He "discovered" channel 19 a while back, and will alternate between 19 and the local "home" channel that he usually hangs out on.  He'll use channel 19 for general chit-chat, much to the annoyance of truckers driving through the city.  Of course, truckers can make great CB trolling targets...and that's what the CBer in question loves to do.

You could call the FCC...but its better to just use another frequency/channel/band/etc. 

But, to answer your question, no, technically, no one can "own" a channel.  They can, however, run power with a serious antenna and de facto own a channel if they really want to and have nothing better to do. 

405
Peskies / Re: 6248khz LSB 0050z - 0110z 2/9/20
« on: February 11, 2020, 1333 UTC »
Possibly a military training net?  That, or another mystery Spanish language net on HF :D  8)

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