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Marathon 2009

Usual suspects...  Total RF TV Pool using

ch1 477.000R (Director)
ch2 477.500R SetUp, Issues, TearDown
ch3 478.000R IFB

Public Safety
SOPS 1  Main SP Ch
SOPS 2  Unit2Unit
SOPS 3-LPS 1 Locals tie to MSP
ITAC2-Boston PD 1  Boston Area
471.464  HopkintonLPS-2 National Guard along course
LPS-9 National Guard with Buses
LPS-2 ?

Much of the below is same as its been the past few years

 

2008
The total RF gang WQGT374 has been testing all weekend
ch1 477.0000R (Directors Channel)
ch2 477.5000R So far mostly set up issues
ch3 478.0000R Just NOAA weather so far

 

Marathon 2007
WQGT374

Prudential Tower      Ashland           Natick
476.0125S
476.7500R
477.0000R             477.0000R     477.0000R
477.2500R
477.5000R             477.5000R     477.5000R
477.7500R
478.0000R             478.0000R     478.0000R
478.2500R
478.5000R             478.5000R     478.5000R

Some other new channels posted on ScanMass.net from Jay
 

Race Operations

Route Vehicles are on the ALL-COMM/Comtronics LTR Trunk system ID# 34 Back-up Citywide Trunk Channel ID#19
The Majority of these channels are simplex, the ones marked with a * are repeaterized locally.

Announcers 452.600 110.9
Ears 463.225 156.7
Finish 462.125 118.8
Medical 463.550 127.3
Security 461.225 D343
Image Impact 463.725 D343
Start 453.000* D503
VIP Runners 458.000 69.3
Admin 463.550* 85.4
__________________
Jay
 

 2007 Public Safety
State Talkgroups SOPS-1, SOPS-2, SOPS-3 (Hopkinton), SOPS-4, LPS-1, LPS-2,  LPS-7, (National Guard)  STATE (Airwing)
BAPERN Areawide 3 470.7875 131.8 and Aerawide 4 470.5625  131.8
BAPERN W 470.7375  131.8 BAPERN C 470.9875R
Hopkinton Police  471.6125 123.0
Ashland Police     483.1125  123.0
Framingham PD  471.7625  131.8
Natick Police        472.7375  131.8
Wellesley Police   471.4875  131.8
Newton Police  1  470.8375  131.8
Newton Police  2  470.3875  131.8
Brookline PD        471.0125 131.8
Boston Police   1  460.350    118.8  Citywide/Special Events
Boston Police   5  460.500    118.8  Area D Ops
Boston Police  10 460.250    118.8  Officers
Boston Police  12 460.050     D343  MOPS
Boston EMS    10 462.975    151.4
Boston EMS       9 462.950   151.4
Boston EMS     12 460.550   192.8

2006 Another STA for 06 with some new changes.... 
As usual for the Marathon 06 we see a T-Band (UHF TV Ch 15) STA for the broadcast pool folks at TotalRF (the gang from PA who do the whole camera pool and ESPN2 feed...they bring the special camera trucks, motorcycles, the helicopters and all the Microwave and RF stuff to pull off the video feed). This year however there is some big changes in the location of these repeaters. No longer does it seem that they are using Honey Hill in Hopkinton but now two sites along the route in Ashland and Natick are listed on the granted Application.

WQES994 from April 13-8th
All 75w FB2ís on Pru, Ashland and Natick. Only 5 watt portables and mobiles on the inputs.  The repeaters can be locked on or keyed by input. Output is CS
Prudential Tower Outputs       Ashland (West Union and Olive Street)    Natick (200' east of Dorsey Lane)
476.0125R
476.7300R
477.0000R                              477.0000R                                                 477.0000R
477.2500R                            
477.5000R                              477.5000R                                                 477.5000R
477.7500R
478.0000R                              478.0000R                                                 478.0000R
478.2500R
478.5000R                              478.5000R                                                 478.5000R

 

 

Total RF testing 4/16/2005
Heard so far

477.000R  Ch1 Directors Channel
477.500R  Ch2    (most active today)
478.000R  Ch 3
478.500R  Ch12

2005 Another STA for 05....    (4/3/05  Thanks to Clyde R. for pointing this out so early)
Its that time of year again and the broadcast pool folks at TotalRF (the gang from PA who do the whole camera pool and ESPN2 feed...they bring the special camera trucks, motorcycles, the helicopters and all the Microwave and RF stuff to pull off the video feed) again have an STA for a bunch of T Band channels in TV Channel 15.
WQCL432 from April12-17th
All 75w FB2ís on both Honey Hill and the Pru. Only 5 watt portables on the inputs.  The repeaters can be locked on or keyed by input. Output is CS
Prudential Tower Outputs       Honey Hill Hopkinton Outputs
476.0125R                               476.0125R
476.750R                                
476.750R
477.000R                                
477.000R
477.250R                                
477.250R
477.500R                                
477.500R
477.750R                                
477.750R
478.000R                                
478.000R
478.250R                                
478.250R
478.500R                                
478.500R

2005 Public Safety
State Talkgroups SOPS-1, SOPS-2, SOPS-3 (Hopkinton), SOPS-4, LPS-1, LPS-2,  LPS-7, (National Guard)  STATE (Airwing)
BAPERN 3 470.7875 131.8 and 4 470.5625  131.8
BAPERN 2W 470.7375  131.8 BAPERN 2C 470.9875R
Hopkinton Police  471.6125 123.0
Ashland Police     483.1125  123.0
Framingham PD  471.7625  131.8
Natick Police        472.7375  131.8
Wellesley Police   471.4875  131.8
Newton Police  1  470.8375  131.8
Newton Police  2  470.3875  131.8
Boston Police   1  460.350    118.8  Citywide/Special Events
Boston Police   5  460.500    118.8  Area D Ops
Boston Police  10 460.250    118.8  Officers
Boston Police  12 460.050     D343  MOPS
Boston EMS    10 462.975    151.4
Boston EMS       9 462.950   151.4
Boston EMS     12 460.550   192.8

 

2004 Wrap Up
Public Safety
State Talkgroups SOPS-1 SOPS-2 SOPS-5 SOPS-7 LOCPS-1  LOCPS-2 STATE
BAPERN 3 and 4
BAPERN 2W 470.7375  131.8 BAPERN 2C 470.9875R
Hopkinton Police  471.6125 123.0
Ashland Police     483.1125  123.0
Framingham PD  471.7625  131.8
Natick Police        472.7375  131.8
Wellesley Police   471.4875  131.8
Newton Police  1  470.8375  131.8
Newton Police  2  470.3875  131.8
Boston Police   1  460.350    118.8  Citywide/Special Events
Boston Police   5  460.500    118.8  Area D Ops
Boston Police  10 460.250    118.8  Officers
Boston Police  12 460.050     D343  MOPS
Boston EMS    10 462.975    151.4
Boston EMS       9 462.950   151.4
Boston EMS     12 460.550   192.8

 

TotalRF now in town and testing
What we have so far... 4/18/04

477.0000R ch1  Director                         tied to 450.2125R
477.5000R ch2                                      tied to 450.7000R
478.0000R ch3  Production
I have them refer to a ch4 for the helos but have not id it yet. Ch8 I believe to be direct somewhere
478.5000R        music so far
480.0000          airborne carrier I think
480.0250          carrier 

Part74 freqs
450.2125R tied to ch1 above
450.5625R   carrier so far
450.7000R tied to ch2 above
450.7375R short carriers

455.1875  data
455.9250  tone

STA has been changed on 3/30
WPZW711
All 75w FB2ís in both Honey Hill and the Pru. Only 5 watt portables on the inputs.  The repeaters can be locked on or keyed by input. Output is CS
Pru                Honey Hill        Mobile
476.0125R
476.7500R    476.7500R    479.7500M
477.0000R    477.0000R    480.0000M
477.2500R    477.2500R    480.2500M
477.5000R    477.5000R    480.5000M
477.7500R    477.7500R    480.7500M
478.0000R    478.0000R    481.0000M
478.2500R    478.2500R    481.2500M
478.5000R    478.5000R    481.5000M
                     480.3875M5w
                     480.7875M5w
                     481.2500M5w
                     481.3123M5w

2004 Another STA for 04....
On the broadcast end TotalRF (the folks from PA who do the whole camera pool and ESPN2 feed...they bring the special camera trucks, motorcycles, the helicopters and all the Microwave and RF stuff to pull off the video feed) is again using a whole bunch of frequencies that they have licensed for a few days here. They have an STA UHF TV ch 15
WPZW711
All 75w FB2ís in both Honey Hill and the Pru. Only 5 watt portables on the inputs.  The repeaters can be locked on or keyed by input. Output is CS
476.750R
477.000R
477.250R
477.500R
477.750R
478.000R
478.250R
478.500R

They have also coordinated with the Boston Area TV and Radio stations to use the following Part74 frequencies.

Pairs
450/455.2125
450/455.3875
450/455.7000
450/455.7375
450/455.8000
450/455.8375
450/455.8625

450.7625/455.8325

450.9000
450.9500



On the Public Safety Side I'm guessing will see...
State Talkgroups SOPS-1 SOPS-2  LOCPS-1  LOCPS-2 STATE
BAPERN 3 and 4
BAPERN 2W 470.7375  131.8
Hopkinton Police  471.6125 123.0
Framingham PD  471.7625  131.8
Natick Police        472.7375  131.8
Wellesley Police   471.4875  131.8
Newton Police  1  470.8375  131.8
Newton Police  2  470.3875  131.8
Boston Police   1  460.350    118.8  Citywide/Special Events
Boston Police   5  460.500    118.8  Area D Ops
Boston Police  10 460.250    118.8  Officers
Boston Police  12 460.050     D343  MOPS
Boston EMS    10 462.975    151.4
Boston EMS       9 462.950   151.4
Boston EMS     12 460.550   192.8

 

2003 After the Fact:
From Kennyblues@aol.com in Scan-Mass-East

Results from this mornings monitoring from Rockland
State Police Zone 5
LOCPS 1 36368
STATE     35472
FM East   34992
Tech SW  35344
SOPS 1 (1A) 33360
SOPS 2 (1H) 33488
SOPS 5 (1C) 33872
SOPS 7 (1D) 34096
Low Band 2 42.34
Low Band 5 42.54

Helicoptors
123.05
122.85

F-15 Fly By - Callsign, Slam 01
262.0
259.6
260.9

BAPERN 2 Central 470.9875
BAPERN 3 470.7875
BAPERN 4 470.5625

Boston PD
460.025
460.075
460.250
460.300
460.350

Boston EMS
460.550
Boston FD
483.2375

From Bill Smith in Scan-Mass-East

476.0125 ESPN-2 program audio

477.0, 477.5, 478.0, 478.5 camera control

407.3 both freq inversion scrambling and digital

411.150 digital encrypted

411.60 got a few carriers, but heard no audio.

 

Myself with very limited scanning time near the Finish also heard BEMS using 460.525
TotalRF was using there temporary channels heavily.

477.000 Camera Set Ups
477.500 Chat with Cycles
477.800 Camera Cues
478.000
478.500 ESPN2 IFB

 Media Channels that I "wasn't" listening too:

161.760 Mix985 broadcast from VOX Populi on Boylston Street 9a-7p
166.250 Portables talking about Marathon stuff??
450.0375R WBZTV4 Ch1  146.2
450.0625R Mix985 cueing VOX Populi on Boylston Street 9a-7p
450.0875  WHDHTV7 Ch2  136.5
450.1125R Metro Traffic 141.3
450.1375R WFXTTV25 Ch1 023
450.1625R WFXTTV25 Ch2 023
450.250R WLVITV56 Ch1 77.0
450.2875R WCVBTV5 Ch5 110.9
450.4375R Cueing for WBCN remote
450.4625R Greater Boston Radio 179.9  Engineers at remote sites
450.5125  WHDHTV7 Ch3  136.5
450.5375R  WBZTV4 Ch3  146.2
450.5875R WRKO680 94.8  Traffic
450.6125R WHDHTV7 Ch1 136.5
450.650R WBZ1030 82.5 Traffic and News feeds
450.7375 Director cueing cameras for some Marathon broadcast?
455.0875  WCVBTV5 Ch1  167.9
455.4125 MMCOMM Eng's comms between finish area remote sites (Dad's, VOX, and Barcode)
455.5125 WCVBTV5 IFB
 


 

2003 Some big changes noted before the race....
On the broadcast end TotalRF (the folks from PA who do the whole camera pool and ESPN2 feed...they bring the special camera trucks, motorcycles, the helicopters and all the Microwave and RF stuff to pull off the video feed) is using a whole bunch of new frequencies that they have licensed for a few days here. Look where they are UHF TV ch 15 (they must have a few friends in high places....)
WPXH240
All 75w FB2ís in both Honey Hill and the Pru. Only 5 watt portables on the inputs.  The repeaters can be locked on or keyed by input. Output is CS
476.750R
477.000R
477.250R
477.500R
477.750R
478.000R
478.250R
478.500R

Today 4/18 477.500 and 478.000 where most active with the Helo testing it's GPS and Microwave shots. I heard them schedule more testing for tomorrow afternoon.


On the Public Safety Side I'm guessing will see...
State Talkgroups SOPS-1 SOPS-2  LOCPS-1  LOCPS-2 STATE
BAPERN 3 and 4
BAPERN 2W 470.7375  131.8
Hopkinton Police  471.6125 123.0
Framingham PD  471.7625  131.8
Natick Police        472.7375  131.8
Wellesley Police   471.4875  131.8
Newton Police  1  470.8375  131.8
Newton Police  2  470.3875  131.8
Boston Police   1  460.350    118.8  Citywide/Special Events
Boston Police   5  460.500    118.8  Area D Ops
Boston Police  10 460.250    118.8  Officers
Boston Police  12 460.050     D343  MOPS
Boston EMS    10 462.975    151.4
Boston EMS       9 462.950   151.4
Boston EMS     12 460.550   192.8

 

2002 After the Fact:
From Kennyblues@aol.com in Scan-Mass-East
I Observed the following yesterday during the running of the Boston Marathon

State Police,
LPS 1 (36336), Unified Command, Sierra CP,
LPS 2 (36368)
MEMA East (38928)
FM East (34992) Fire Marshal
SOPS 1A (33360)
SOPS 1C (33872)
SOPS 1D (34096)
SOPS 1H (33488)
All heard on MSP Zone 5, as well as SOPS 1D & 1H also heard on Zone 3

Boston Police,
460.350 Ch. 1
460.500 Ch. 5
460.075 Ch. 9
460.250 Ch. 10
460.050 Ch. 12

Boston EMS
462.975 Ch 10
462.950 Ch 9
460.550 TAC 12
460.525 TAC 14
453.775 TAC 16

Boston FD
483.2375 F-3

BAPERN 3, 4,

I myself with very limited scanning time near the Finish was hearing most of what Kenny has listed above and for Media Channels that I "wasn't" listening too:

161.640 WBMX in Hopkington 6-9a/ than WQSX outside Fleet Center 3-7p 85.4
161.760 WBMX from VOX Populi on Boylston Street 9a-7p
450.0375R WBZTV4 Ch1  146.2
450.0625R WQSX cueing outside the Fleetcenter 3-7p
450.0875  WHDHTV7 Ch2  136.5
450.1125R Metro Traffic 141.3
450.1375R WFXTTV25 Ch1 023
450.1625R WFXTTV25 Ch2 023
450.2125R TotalRF Engineers making changes CS
450.250R WLVITV56 Ch1 77.0
450.2875R WCVBTV5 Ch5 110.9
450.4375R Cueing for WBCN remote 9a-3p WBMX 3p-7p
450.4625R Greater Boston Radio 179.9  Engineers at remote sites
450.5125  WHDHTV7 Ch3  136.5
450.5375R  WBZTV4 Ch3  146.2
450.5875R WRKO680 94.8  Traffic
450.6125R WHDHTV7 Ch1 136.5
450.650R WBZ1030 82.5 Traffic and News feeds
450.700R TotalRF TV Pool Camera Cues CS
450.7625R  ESPN audio IFB CS
450.8000R TotalRF TV Pool Camera Cues CS
450.9000R TotalRF TV Pool Spotters along course CS
455.0875  WCVBTV5 Ch1  167.9
455.1875 Cueing for VOX remote until 3pm when they switched to 450.4375R after WBCN finished.
455.4125 MMCOMM Eng's comms between finish area remote sites
455.5125 WCVBTV5 IFB

What we had before the Race:

Home
The BAA has had Nextel as an official sponsor for the last 5 years and almost all official communication has been there for some time. They do have an Amateur Radio Net of volunteers for Medical stations and general race route info as well.

bulletPublic Safety
State Talkgroups LPS-2, SOPS 1H, SOPS 1A
BAPERN 3  470.7875  131.8
BAPERN 4  470.5625  131.8
BAPERN 2W 470.7375  131.8
Hopkinton Police  471.6125 123.0
Framingham PD  471.7625  131.8
Natick Police        472.7375  131.8
Wellesley Police   471.4875  131.8
Newton Police  1  470.8375  131.8
Newton Police  2  470.3875  131.8
Boston Police   1  460.350    118.8  Citywide/Special Events
Boston Police   5  460.500    118.8  Area D Ops
Boston Police  10 460.250    118.8  Officers
Boston Police  12 460.050     D343  Special Ops
Boston EMS    10 462.975    151.4
Boston EMS       9 462.950   151.4
Boston EMS     12 460.550   192.8

note: from Gary Saffer in Scan-Mass-East Gary Saffer [garys2@attbi.com] I heard an interesting broadcast on Boston PD last night. The dispatcher advised that all Lieutenants would be operating on Channel 10 and advised that any LTs that didn't have Channel 10 programmed into their radios should get to the shop before Monday to have it added to their portables. They also announced the channel for all Patrolmen and Sergeants, but I'm not sure if it's Channel 1 or not since the dispatcher broke up. If it's typical BPD broadcasts, they'll make it several more times before Monday. Boston EMS will probably be primarily on Citywide Channel 10, with tactical and logistics on Channels 9 or 12.
Gary

 

bulletNational Media: TV Pool/ESPN  TotalRF and SFX Entertainment

Start Area Hopkinton:
 
ESPN  IFB 450.7625 CSQ
Start Line Spotter PL 450.9500 CSQ
Start Line Dir PL 450.7000 CSQ
Start Line MW 450.8000 CSQ
Start Line Prod PL 450.9000 CSQ
GPS 455.8000 CSQ


Finish and rest of the Event (Pru)

Director PL Ch1 450.8375 CSQ
MW PL Ch2 450.2125 CSQ
Producer PL 450.7375 CSQ
Spotter PL 450.3875 CSQ
Spare PL 450.8625 CSQ

 

bulletLocal Media

Boston Television      (Nextel is now used very heavily by all the Boston TV stations)


WBZ TV 4  CBS affiliate owned by CBS/Viacom     (PL 146.2)
R450.0375  KCG839 KPL379 KPL552  Channel 1 Assignment Desk  Boston/Needham (455.0375in)
   450.3500  KCG839                                 Channel 2 IFB                           Boston/Needham
R450.5375  KCG839 KPL379 KPL552  Channel 3 Engineering            Boston/Needham  (455.0375in)


WCVB TV 5 ABC affiliate owned by The Hearst Argyle
 455.0875  KYY288                    Channel 1 Engineering                             100 Federal St. Boston  (PL 167.9)
 450.4125  KTE752                    Channel 2  Direct Comms. on Ch4 output                                        
 455.5125  KKN760                   Channel 3 IFB                                             One Beacon St. Boston (PL 167.9)
R450.4125  KTE752 KPE562  Channel 4 Inactive former Boston Rep    100 Federal St. Boston  (PL 103.5)               (455.6125in)
R450.2875  KPF325                  Channel 5  New Boston Repeater           One Financial Boston (PL 110.9)
 450.2875 KPF325                     Channel 6 Direct on Ch5 Output                                                    (PL 110.9)
Note: CVB has made so many changes with their radio system over the last few years that I am very unsure of their current channel plan now. Both repeaters used to be out on the 455 side with the direct channels also on 455. I'm assuming that these shifted when the repeaters did. Than their Waltham repeater on 2875 recently moved into One Financial and the .6125 machine has gone dark though once in a great while I will hear it key or ID very weakly as if it has problems or has moved. 


WHDH TV 7 NBC affiliate owned by the Sunbeam Company  (PL 136.5)
R450.6125  KIZ911        Channel 1 Assignment Desk/Eng                         Boston/Newton  (455.3125in)
 450.0875  KIZ911          Channel 2 Engineering                                           Newton
 450.5125 KIZ911           Channel 3 Back up Comm and IFB                      Newton


WFXT TV 25 FOX affiliate owned by Fox (DPL023)
R450.1375  KC25359   Channel 1 Assignment Desk                 Needham   (455.1375in)
R450.1625  KC25359   Channel 2 Engineering                           Needham   (455.1625in)


WLVI TV 56 WB affiliate owned by the Tribune Company    (PL 77.0)
R450.2500 KQP700     News Operations        One Financial

 

Boston Radio     (Many radio stations use MMCOMM for their remotes see below) 

Infinity/CBS

WBCN "The Rock Revoloution"NewsRadio 1030 WBZWZLX "Boston's Classic Rock"Mix98.5 "Boston's Best Mix"
WBCN FM 104.1 owned by Infinity/CBS  (PL 82.5)
R450.4375 KPJ731 KC23788     Channel 1/MMCOMMch1   Comms, Cues     (455.4375in)
  450.4375  KPJ731 KC23788     Channel 2/MMCOMMch2   (Direct on Ch 1)
  455.4124  KPI967                        Channel 3/MMCOMMch3
  455.1875  KPI967                        Channel 4/MMCOMMch4
  161.64,67,70,73,76 KA59059    Remote Pick Up Channels
Some Remotes done by Minuteman Communications


WBZ AM 1030 owned by Infinity/CBS (PL 82.5)
R 450.650 KLM466    News and Traffic   (455.650in)
Some Remotes done by Minuteman Communications

WBMX FM 98.5 owned by Infinity/CBS
Remotes done by Minuteman Communications


WZLX FM 100.7 owned by Infinity/CBS
450.900, 455.900 KC27624 Remote Pick Up Channels
Many Remotes done by Minuteman Communications

Entercom

WRKO "The Talk Station"Star937 "The Rythm of Boston"WAAF "The Only Station That Really Rocks"WEEI "Sports Radio 590"
WRKO AM 680, WQSX FM 93.7, WEEI AM 850, WAAF AM 107.3 owned by Entercom
R450.5875                    Channel 1  RKO Skyway Patrol Traffic         One Financial Boston (PL94.8) (455.5875in)
R450.0625 KPK909    Channel 2  Engineering all stations /MMCOMMch5      One Financial Boston (PL85.4)  (455.0625in)
R450.700 KGQ360 KB55419  RPU repeater in Paxton used by WAAF  (455.700in)
455.750,450,750 KB55419  RPU receiver on One Financial used by WAAF                 
Many Remotes done by Minuteman Communications

Greater Media

WBOSWKLB "Boston Spells Country WKLB"WROR "The Songs you Rember"
WBOS FM 92.9, WTKK FM 96.9, WKLB FM 99.5, WROR FM 105.7, WMJX 106.7 owned by Greater Media
R450.4625                   Channel 1 Engineering all stations     Pru Tower     (PL 179.9)  (455.4625in)
450.900,455.900 KPM666   RPU receiver on The Pru
Many Remotes done by Minuteman Communications

Clear Channel

JAMN 94.5 "Today's Hottest Music"WXKS "Kiss108 FM"

WJMN FM 94.5, WXKS FM 107.9 owned by Clear Channel
455.950, 450.950, 455.900, 450.900  KC62857
Many Remotes done by Minuteman Communications

Radio One


WILD AM 1090, WBOT FM 97.7 owned by Radio One
166.25   KB55691 WILD remotes

Radio Traffic Reports

Metro Traffic/SmartRoutes/ShadowTraffic all owned by WestwoodOne/CBS/Viacom
R450.1125  KPF288 KPF292      Metro Traffic   One Financial            (455.1125in) (PL 141.3)
R460.925  WPRL403       Smart Routes            Hancock Tower           (465.925in) (PL 131.8)
R461.925  WPRG212      Smart Routes Ch2                                          (466.925in) (PL131.8)
R450.5625 WPMD326    Shadow Traffic                                                (455.5625in) (PL100.0)

Remote Broadcast Services

Minuteman Communications  provides remote broadcast services for many Boston Area Stations 
R450.4375 KPJ731 KC23788       Channel 1                     (455.4375in) (PL 82.5)
 450.4375  KPJ731 KC23788        Channel 2 (Ch1 direct)                       (PL 82.5)  
 455.4124  KPI967                           Channel 3                                             (PL 82.5)
 455.1875  KPI967                           Channel 4                                             (PL 82.5)
R450.0625 KPK909                        Channel 5                                             (PL85.4)

161.64,67,70,73,76    Remote Pick Up Channels Pru receive site
166.250         IFB transmitter (seldom used) Pru