What would the radio sound like?

[canucksaram]

A century and a half after the end, what would the radio sound like? Assuming you were in and around the Great Lakes region of North America and you used your Morrow equipment to tune into the AM and FM radio bands, what would you hear?

Some of the surviving groups in the 4th edition game would have radio technology and perhaps have even scavenged old music from the Time Before. How far could radio towers or broadcasters throw a signal in the AM/FM bands? Would they even use these bands or would they use something else, because of power requirements?

I'm also not clear on what Morrow teams would hear on their own Project equipment when tuning in to Morrow channels. How far can their equipment broadcast? Would there be any sort of automated "stand by and continue monitoring" signal from regional or divisional Morrow Project bases?

In the game I've just started to run the PCs are members of a Medical & Civil Recovery team. They have awoken to find that of the 12 members on the team only 5 have survived. Their hibersleep containers started the wake-up process automatically because their bolt-hole's power levels fell into critical, so they have not been contacted by any Morrow base. Their computer is mostly fried, too, having been sabotaged with a virus.

After scouting the region around their bolt-hole they've found themselves some survivors: descendants of the Mennonite and Amish of southwestern Ontario, Canada, near Waterloo. Trade exists between these farmers and a more technologically advanced group known as the Kingdom of Gwellip. The survivors of the Six Nations natives (Iroquois, etc.) have a territory and there was mention by the Amish of a group called Bateliers, or Lakers, who ply the "big waters" and live in the Republic of Arcadia, far away to the north.

[mmartin798]

The first thing you would likely see is much lower power and range. It's hard justify 25-50KW of electricity for AM broadcasts, even on a part-time basis. But even at lower power, you should be able to detect the signal at a fair distance, say 200 km as the signal can bounce off the atmosphere. At those distance, you probably will not be able to make out much of any of the content from spoken words or music over the static, though Morse code can still be deciphered through the static. It is also likely that AM would be chosen over FM as a very simple AM receiver can be built with essentially a pile of junk. You can see some examples of foxhole and POW radios here:

http://bizarrelabs.com/foxhole.htm


As for ranges for the AN/PRC-68, the 4th edition is right; 300m for the short antenna supplied with the radio and 1.6 km using the longer antenna from a PRC-70. They are line of sight, so you can't be blocked by buildings or terrain. Vegetation is does not block the signal much.

The AN/PRC-70 is a bit more complicated. You can pretty much count on 40 km for FM voice communications and 2400 km for Morse code (CW) and single side band (SSB) voice if the operator knew the best operating frequency for the day. If the PRC-70 was connected to the vehicle and using it's antenna and amplifier, knowing the maximum usable frequency (MUF) is less important. One possible scenario here is that Prime Base or other major installation can send out the predicted MUF weekly or daily via CW to enable long range voice on SSB.

The from range from a PRC-68 to a PRC-70 using the standard PRC-68 antenna is about 1 km, because of the better sensitivity of the long PRC-70 antenna. The range from a PRC-70 to a PRC-68 is about 40 km. This means it is possible to send messages to a squad on foot, but they may not be able to reply.

If you have two PRC-70s, you can do some interesting things. The PRC-70s can be connected to retransmit everything it receives. This lets you have two nets of PRC-68 set up and able to communicate at greater range and even over a hill if the PRC-70s are at the top has line of sight to all the PRC-68s.

As to the kinds of Project radio traffic to expect, it's your game. Just remember there are factions that have Project equipment. This kind of makes the automated broadcasts questionable, since the sources would have been checked out by Krell or KFS at some point. One thing that happened in one of my games is the team sent out a repeating CW message and got a reply back from "Morrow Eastern Command." The Command requested the team's location and offered to send them aid. The team didn't bite, but doesn't mean that the KFS Secret Police would not try that trick again to locate newly awakened teams.

[Matt W]

Initial thoughts/suggestions for radio traffic near the Great Lakes. Hopefully, each of them can inspire an adventure "hook"

Lakers/Shipmen:

The Weather

Every midnight there would be some LOUD spark-gap morse transmissions from about 10 or 20 stations. Note: The limitations of spark-gap radio means that this takes up a lot of bandwidth. These transmissions would be "in clear" and consist of a list of weather measurements (temperature, rainfall, barometric pressure, wind velocity, etcetera). This would continue for about an hour and then go quiet. At 5 AM there would be a single station (again in spark-gap mode) which broadcasts a weather forecast for the next 24 hours. This is acknowledged and re-broadcast by each of the original stations

Maxwell's Militia:

SW Talk Radio (all "in-clear")

Farmers' Almanack. General advice for farmers, including a weather forecast (obviously influenced by the Shipmen program)
Market reports - daily report on average prices paid for crops, fish, services etcetera in towns controlled by the Militia
Security notices - warnings of any bandit activities, quarantine orders, and so on
News - reports of "interesting" events, interviews with celebrity Militia Commanders, etcetera
Roving Reporter - a mobile radio transmitter, interviewing locals. This is pro-Militia propaganda, but - sometimes- real journalism creeps in
Radio Theater - soap operas, plays and comedies
Ask Doctor Sally - a show hosted by a qualified EmDee, responding to letters sent in by listeners

FM Music

A few low-power stations. In towns and urban areas only. These broadcast a mix of music from old CDs, records and a few "modern" musicians. Some of these stations are officially sanctioned, but others are created by hobbyist-technicians and are allowed to exist only if they don't get critical about the Militia


Frozen Chosen

Mainly a mix of Gospel Music (performed live) and inspirational messages, but news and weather forecasts are a regular feature

Kentucky Free State
There might be areas where you can pick up transmissions from the KFS.

But that gives me an idea for 'Operation Fallback"...

Station VOK is "the Voice of Kentucky". Cheerful music, propaganda about the KFS liberating villages and warnings about the crazy Morrow Project

[mmartin798]

Originally Posted by Matt W

Kentucky Free State
There might be areas where you can pick up transmissions from the KFS.

But that gives me an idea for 'Operation Fallback"...

Station VOK is "the Voice of Kentucky". Cheerful music, propaganda about the KFS liberating villages and warnings about the crazy Morrow Project

VOK is in a very good position. They could broadcast at 50KW or more and be possibly heard nationwide if they were to go 100KW. KFS has fusion, so power is cheapish.

[canucksaram]

Thank you for your responses so far, gentlemen.

Is there any way for someone to broadcast a jamming signal over radio frequencies so that a region would be denied access to outside signals if you had a Morrow Project fusion trailer, for example, as the power source?

[Nowhere Man 1966]

Originally Posted by canucksaram

Thank you for your responses so far, gentlemen.

Is there any way for someone to broadcast a jamming signal over radio frequencies so that a region would be denied access to outside signals if you had a Morrow Project fusion trailer, for example, as the power source?

Jamming can be done but seeing what the Soviets did, they had huge antennas for a jamming stations so I'm sure one can be made but it is not too transportable. A fusion unit should suffice as power. Even so, it isn't perfect, AM and shortwave signals depend on groundwaves and skywaves. Groundwaves follow the Earth while skywaves bounce off the ionosphere and the latter can be hard to jam because the ionosphere changes and the signals may bounce differently and there are times jamming may not work. During the Cold War, there were times Soviet citizens took portable SW radios to the countryside to listen to Western radio and many times they were outside the jammer's range or the ionosphere was cooperating.

Would be interesting to say the least, that's who I'd park a few portable radios and police scanners into my personal kit.

I'm an amateur radio operator, I once talked to Canada from across Lake Erie on my HT putting out 1 watt into a rubber duckie antenna, so given the right conditions, the PRC-68 can talk far. The PRC-70, in theory, can talk worldwide on HF. Not only power is needed but you also need a good antenna, the ionosphere working in your favor and/or flat land where your signal can go far (or a tall mountain/hill/tower).

Most societies might not have the resources for a 50 Kw blowtorch AM station, well maybe one or two, depending on how affluent they are, but I can see stations in the 500 watt to 5000 watt range. I think after the war or collapse in the MP world, the radio bands will be much less crowded so even a 500 watt to 5000 watt signal would go far, even less than that.

[canucksaram]

To elaborate a bit about my interest in radio signal jamming:

One of the regional powers that I'm using in my game is a group of folks descended from a mix of university students and faculty and Renaissance Faire enthusiasts. In my part of Canada we have three universities clustered close together: the University of Waterloo, the University of Guelph, and Sir Wilfrid Laurier University. A century and half after the Pockyclypse (hat tip to Mad Max) they are now a fascist state run by a hereditary philosopher king and are known as the Kingdom of Gwellip. Since knowledge is power, the ruling elite of the Kingdom try to control news and information.

The Kingdom bullies the Amish, treat with the Six Nations, and have a cool relationship towards the Regiment, a remnant of the pre-apocalypse Canadian government that claims to be the legitimate government of the nation. The toxic ruins of the Golden Horseshoe (the urban sprawl that hugs the western shores of Lake Ontario from Hamilton to far east of Toronto) are a buffer zone of Badges and salvage clans that lie between Gwellip and the Regiment.

For the other parts of the Great Lakes region I'm using setting material from here: http://asmrb.pbworks.com/w/page/1025...0Great%20Lakes

[cosmicfish]

If you want to jam a signal the easy way, you need to produce more power than the signal, at the same frequency, at the receiver. If you are both using standard dipole antennas then the power drops off with 1/r^2 and you just need to find the line where the received power from the jammer and transmitter are equal - on one side of that line the signal gets through, on the other it does not.

For example:

Transmitter, 50 kW
Jammer, 100kW, 5km away

On the line joining the two, the Transmitter wins up to 12.07km away ( on the transmitter's side) and 2.07km away ( on the jammer's side) so as you walked that line, you would be able to hear the transmitter for 12km, then you would hit the transmitter, then 2km later the signal would be gone (still 3km from the jammer).

[canucksaram]

Would this be a feasible radio jamming setup?

Central tower, powered by electricity generated by steam turbine, with a solar panel backup.

Repeaters hidden in trees, weatherproofed to some degree, with their own solar panel power supplies. Perhaps one repeater every five kilometres, in a radial or spiderweb pattern?

Better yet, since the regime in mind has a semi-feudal organization, there are fortifications that can host towers. At a protected hard site like that a tethered balloon could be sent up to then send interfering signals. Hmmm....

[mmartin798]

The fusion trailer generates 100KW. This should be able to drive a sufficiently powerful jammer for most low power broadcast stations. All that is needed is to broadcast you noise a the same frequency, but with more power, as the signal you are jamming. Parking the broadcast tower and trailer a km or so from Whitman's Creek would completely squelch their 5000W station. But 15km from the transmitter of Voice of Kentucky operating at 50KW would only disrupt the area around the jammer and not the entire signal. If you got closer, you might. But then you have to explain to the nice men with guns and planes why you are erecting a radio tower so close to them with that nifty power trailer.