Tri-Cities Scanner Frequencies
September 2011 Newsletter

Listen to the live scanner at:
  • Win a Free Scanner!
  • Spurious Emissions
  • Archives Now 30 Days
  • New Hear from Here
  • Gray Hamfest
  • JMH MotoTRBO
  • Feed Stats
  • Chapter 21 Answers
Well Since the last newsletter, we've found new frequencies...
Here's a sample of what's new....
Frequency Tone Name State County
151.2050 d244 KY Forestry Link KY Magoffin
153.5525 100.0 Smyth County Repeater VA Smyth

Most of our efforts this month have been on solving our Unknowns Database.

Check out the Radio PhoneBook (link at bottom) for more.

Scanner Giveaway/ Drawing

We're giving away a new Radio Shack Pro-404, 200 channel handheld scanner
to one lucky winner. Those that sign up for a chance to win will also receive a coupon for use at our local
(Abingdon, VA) Radio Shack!
To sign up for a chance to win please follow the link on our homepage at

No Purchase Required to win.
Contest Guidelines

Frequency Coverage: 28-54,108-136.9916, 137-174, 406-512
See the complete specifications at

Drawing date to be announced in next month's newsletter, Stay Tuned!

Spurious Emissions

Washington County, VA's Public Safety
repeater atop Brumley Mountain has recently
begun emitting a spurious emission or suspected
harmonic above and below its intended frequency
of 155.490. We were surprised to find this at
distance away from the transmitter as far away
as one of our frequent monitoring locations in
Northeast Tennessee.

The bottom spur extends the strongest from
155.345 to 155.375 while the top 155.610 to
155.640 We independently tested to ensure we
were not experiencing degraded selectivity on our
receivers. We sent word to the appropriate county
official about this issue and wish them a speedy fix!

Spurious emissions are usually eliminated by using tuned
cavities that only allow certain frequencies to pass,
repeater operators may sometimes refer to these as "cans".
These types of cavities may also be used so that one antenna
can even be used simultaneously for transmit and receive; this configuration is called a "duplexer".

One cavity will be used to "reject" while another is used to "pass" certain frequencies. When used in a duplexer configuration, a configuration of four "cans" is typically used.

Cavities may also be used alone when a separate antenna for
transmitting and receiving is used to limit emissions in and out
to the intended frequency. This is critical on the receiver as nearby transmitters can desensitize the receiver with adjacent signals. Having only your frequency on the output has the same quantifying affect as it is usually the closest transmitter to your receiver.

Cell sites in particular use cavities to transmit the slew of frequencies through a few antennas at the top of the tower.

Rejection Cavities

In the example on the right, a combination of reject and pass
cavities limit and mix the two frequencies so one antenna can
be used.

A prevents the transmitter from transmitting from anything other than its intended frequency; B specially prevents the
received frequency in or out.

C and D work the same way limiting the receiving frequency to the intended frequency only.

The importance of operational A and B not only affect the performance of the receiver but prevent spurious emissions to other nearby systems by keeping only the intended frequency from being emitted.

Combiners allow one antenna for multiple transmitters.

Rejection cavities block the transmitting frequencies only,
additionally tuned cavities may be used so that frequencies other that the transmitter are also blocked.

A multicoupler allows multiple receivers to use one antenna by preventing any interference from the receiver from feeding into the other receiver inputs.


These are just some simple illustrations as repeater systems can be very
complicated including additional filters and cavities, however each additional component adds loss to the system just like a long section of coaxial cable.

Feed Archives now go back 30 Days!  

If you've ever subscribed through Radio to listen to our feeds' archives or any of the nation's other feeds you'll be
pleased to know that archives have been increased from 15 to 30 days.

If you would like to be able to go back and reference archived information, sign up for an account at
and subscribe to the premium service. This is great to find out "what happened" when you miss it live.

Premium Subscription Information Page

Gray, TN Hamfest

The Gray Hamfest is Saturday October 15th at the Appalachian Fair Grounds.

Tickets: $6 (at gate)
Youth: 12 years of age and under are free
Hours: 08:00 to 14:30
Talk-in: 145.290 MHz
[PL=103.5] or 146.520 MHz (Simplex)

They are giving away an Icom IC-7000 HF rig, several Woxun HT's and a bunch of other great prizes.

There will be a VE testing session at the nearby Gray Methodist Church, see for more details. It's a great time to get started in Amateur Radio!

JMH new MotoTRBO System

Johnston Memorial Hospital has requested a modification to their FCC license WNCA503 to incorporate a four+ channel MotoTRBO repeater system for use at the new hospital just outside Abingdon, VA.

Unfortunately, this type of system cannot be received with any scanner.

Frequency Input Tone Note
453.025 458.028 d072 Old system (facilities/maintenance usage)
155.955   - MotoTRBO Repeater
159.030   - MotoTRBO Input/Mobile
159.120   - MotoTRBO Input/Mobile
154.265   - MotoTRBO Repeater

Each MotoTRBO repeater can support up to two user talkgroups simultaneously, thus the system capacity could be as many as four channels repeated and several simplex talkgroups/channels if desired. The old analog system 453.025 was not updated on the license to be used at the new location. The town of Abingdon is no stranger to MotoTRBO with its Police, Fire, Parks/Recs, Street Department, and Schools all on MotoTRBO systems.

New Hear from Here

We completed a two week analysis of what you can hear from Bristol, VA.
This is the byproduct of unknowns research, and very useful in its own self!
If anyone ever tells you there's nothing to listen to in Bristol, prove them wrong, there's plenty!

Take a look our research file for the project and a peek inside it's multi-step process.

Have a Uniden scanner with "search and store" capability? Contact us and we'll walk you through
documenting your area, you never know you may become our newest frequency sleuth!

Fall Fire Season

Fall fire season is here... not only does burning leaves start wildfires but careless smoking and campfires fuel a majority of these potential killers. Practice safe burning and obey your local burning restrictions, there're there for a reason.

There’s also another danger we seldom remember, house fires. Every year when the first cold weather hits the region there are dozens of house fires due to dirty furnaces and flammable objects touching baseboard and wallboard heaters. The sad reality is no matter how much we educate and prepare there is always the statistic. Do your part to keep yourself and your family safe.

It doesn’t hurt to keep an ear on the scanner too, wildfire information can be the difference between life and death and knowing the extent of a neighborhood fire can not only keep you safe but alert you to a neighbors crisis and start the flow of goodwill. With the downturned economy a house fire hurts everyone more than ever. And finally, please don't interfere with any firefighting operations, let the experts do their job.

Feed Stats courtesy of

Wide Area
Min 12
Max 24
Washington County
Min 4
Max 16

For select recordings see the Media Section.

Wide Area Feed

Washington County, VA

Recommended Reading
Two- Way Radios and Scanners
for Dummies

ISBN: 978-0764595820

Perfect for anyone new to the hobby and an excellent refresher for us that has become a little rusty. This is the most up to date publication that effectively covers multiple radio services available.

I have been mentoring someone new to the scanner hobby and provided a little reinforcement. If you want to test your skills, here are some sample tests I quickly drew up to make the subject matter a little more intensive.

Answers to follow in each new newsletter

Answers to chapters 1-6 HERE
Answers to chapters 7-9 HERE
Answers to chapters 10-12 HERE
Answers to chapters 13-14 HERE
Answers to chapter 15 HERE
Answers to chapter 16-17 HERE
Answers to chapter 18 HERE
Answers to chapter 19 HERE
Answers to chapter 20 HERE
Answers to chapter 21 HERE
Recent FCC Licenses - NEXT UPDATE in October
These are yet to be confirmed as active, however its not a bad idea to go ahead and program them in if live near their respective service areas. They have been hand picked from hundreds of new licenses.     FB - Base
MO- Mobile / Portable Use
MOI- Interconnected Mobile
FB2 - Repeater
FB2C - Repeater with interconnect
FB6C - Shared Repeater
FX1- Link to Repeater
FXO - Fixed Transmitter

You can search for FCC
licenses on the
Research page.

  1. Still yet to hear anything on 155.220, however the ambulance agency renewed their license, we'll keep an ear out.
  2. Several new SCADA systems.
  3. New Trunked system as mentioned in the newsletter.
  4. 122.850 new for Alpha Nat Resources based at their Tri-Cities Airport hangar.
  5. ETSU has licensed a frequency for their engineering department for training.
  6. Almost a handful of different portable licenses.
County State Agency Callsign Frequency Type Note
Washington VA Abingdon Convalescent Ambulance WNXD770 155.2200 FB/MO Renewal
Wise VA Wise Regional Waste Water WQOB219 160.2075 FXO New Scada
Tazewell VA Clinch Valley Medical Center WQOA856 72.1000 MO Wireless Clocks
Wise VA Virginia Electric and Power WQNX417 451.0375 FB8 New Trunked Sys
Wise VA Virginia Electric and Power WQNX417 451.2125 FB8 New Trunked Sys
Wise VA Virginia Electric and Power WQNX417 452.2625 FB8 New Trunked Sys
Wise VA Virginia Electric and Power WQNX417 452.3750 FB8 New Trunked Sys
Wise VA Big Stone {Gap} Machine Shop WNGL714 151.7150 FB/MO IB Dale Stidham
Scott VA TempurPedic Factory (Duffield) WQNZ249 451.6375 MO Plant Handhelds
Scott VA TempurPedic Factory (Duffield) WQNZ249 456.6375 MO Plant Handhelds
Lee VA Lee Co, PSA WQNS557 151.8500 FXO Scada
Hawkins TN Hawkins Co Memorial Hospital WQOA975 72.1400 MO Wireless Clocks
Sullivan TN Alpha Natural Resources WQNW204 122.8500 FLU At TRI Airport
Sullivan TN US Airways WQNU997 464.7875 FB2 At TRI Airport
Sullivan TN US Airways WQNU997 469.7875 FB2/MO At TRI Airport
Washington TN ETSU WQNW406 463.9125 FB Gps-rtk Systems Training
Washington TN Buffalo Mtn Camp Retreat WQNU943 451.1125 MO Portables
Washington TN Buffalo Mtn Camp Retreat WQNU943 451.4250 MO Portables
Washington TN Buffalo Mtn Camp Retreat WQNU943 451.6750 MO Portables
Washington TN Buffalo Mtn Camp Retreat WQNU943 451.7750 MO Portables
Washington TN Buffalo Mtn Camp Retreat WQNU943 451.9500 MO Portables
Unicoi TN Unicoi Middle School WQOA836 467.2125 MO Portables
Unicoi TN Progress Rail Recycling - Erwin WQNT465 451.2375 MO Portables
Unicoi TN Progress Rail Recycling - Erwin WQNT465 451.3625 MO Portables
Unicoi TN Progress Rail Recycling - Erwin WQNT465 451.3875 MO Portables
Unicoi TN Progress Rail Recycling - Erwin WQNT465 451.4375 MO Portables
Unicoi TN Progress Rail Recycling - Erwin WQNT465 451.6125 MO Portables
Unicoi TN Progress Rail Recycling - Erwin WQNT465 456.1875 MO Portables
Unicoi TN Progress Rail Recycling - Erwin WQNT465 456.3875 MO Portables
Unicoi TN Progress Rail Recycling - Erwin WQNT465 456.7125 MO Portables

        Download the Radio Phonebook (Updated Oct 1 2011)

Stats / Last Months Stats

Frequency Pairs / Singles: 2118 up from 2105
Unit Numbers: 3331 up from 3328

General Area Covered


Other Month's Newsletters HomePage

Here's what we're STILL working on...

Key Fob Frequencies
Database of Business Frequencies

That's it for now, Happy Scanning!

We want to hear from you!
Drop us an email at

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