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Linn County Fire and EMS

US > Iowa > Linn (County) [Cedar Rapids]

Listen Feed Genre Listeners Player Selection Links Status
 Linn County Fire and EMS

Monitoring Cedar Rapids and the surrounding area through the Linn County Simulcast.
Public Safety
49   Online


Feed Notes

Operator: Scott Abing
Technical Log
7/4/21 user reported issues, system reboot was necessary to bring everything back online correctly
6/14/21 Metadata updates - added around 70 new talkgroup ID's 
4/2/21 Listeners peaking around 50-60 per day on weekends over the past few months! I'm glad to see this project benefiting others. Honestly, I have put this on autopilot for the past 4 months and the thin client running linux and OP25 has been rock solid. Please provide feedback if there are things which need to be addressed. I respond to email and if there are requests for changes which make sense then I take action. 
12/14/20 Metadata updates - added around 100 new talkgroup ID's
12/14/20 User Brain asked about an unidentified talkgroup which lead me to pull the latest info into my metadata spreadsheet.
12/3/20 User Joel checked in with some questions about programming his scanner
11/28/20 Network upgrades today, service will be up and down, will keep it up as much as possible.
9/15/20 While I was on vacation a few users notified me that the feed was garbling. I rebooted remotely initially and now I've updated to the latest version of OP25 and moved the installation to an old thin client. So now on different hardware and software. There is still some slight garbling at times.
9/6/20 Another power outage resulted in the feed going offline as mediacom service went down. The stream is now running on backup power over verizon until power is restored and mediacom comes back up.
8/16/20 I was unable to secure a reliable data connection needed to keep the stream online after the unprecedented wind storm that hit Cedar Rapids on 8/10/20. As an aside, my house took roof & water damage along with the antenna mast snapping in half. My primary internet provider, Mediacom, went down when they lost power and my backup, Verizon, did not provide the stable bandwidth needed to get the stream to the server. On 8/16/20 Mediacom service was restored to my house thus allowing me get the feed going again.
8/5/20  Now using outdoor omnidirectional antenna feeding this feed and the secondary feed.
7/11/20 The scanner software has been configured to automatically handle control channel frequency changes
7/9/20 The raspberry pi scanner has now been up for over 45 days without interuption in service to broadcastify. I will keep providing the feed and focusing on uptime as a priority. I welcome your questions, comments or concerns. 

7/8/20 To follow up on a previous note about audio quality and adding a directional antenna; I did purchase yagi antennas and conducted testing, but determined there was no appreciable gain in the decoding quality. So the main feed is still using a basic omnidirectional antenna and receiving signal from multiple towers in the simulcast system. Originally, a user had complained of occasional garbled audio; the best that I can determine is this is brought about by a combination of irregular signal quality into the simulcast system and the method of error correction employed by the OP25 software. After contacting the lead dev of the software, trying multiple antennas, SDR's and PI's all yielded the same result, I’m going to move on. I feel the audio quality is generally pretty good and not bad at all for free software on a $40 computer… Always open to any suggestions or a free SDS100...

7/7/20 Eric who is running a new feed for Johnson County contacted me. I haven't listened yet, but if there is a reliable and consistent JC feed up now, I will start to eliminate some of the JC chatter from this feed. 
6/10/20 Daily listener count is now around 50
6/9/20 Broadcastify had some issues today, they reported an outage at 6:02pm and reported it fixed by 8:23pm - this was reported as an issue with their hosting provider and some issues continued past their reported fixed time.  In other news, I'm configuring a server for streaming secondary feeds and already have it in testing. More on that soon...
6/8/20 New undocumented tg 52022 has been blacklisted since it is encrypted.
6/8/20 Identifying 50006 as IA TAC 6 until an official name is given. This seems to be Iowa State Patrol communication for multiagency interoperation and is being used in the Iowa City Area. 

6/7/20 User Tom checked in to compliment me on the feed and inquired on how I'm able to scan nonprogrammed talkgroups like we had last night with 50006. See new note at the very bottom of this info.

6/6/20 Undocumented talkgroup 50006 popped up tonight with communication around the Iowa City Protests so I'm temporarily calling it "Iowa City Protest" but it is likely a state or regional tactical interop communication talkgroup like 50002 IA TAC 2. 

6/6/20 Keeping all IC protest unencrypted communication available

6/6/20 Blacklisted 50002 IA TAC 2 due to out of area communication  - will consider for inclusion in secondary feed.

6/6/20 Blacklisted 16406 UnityPoint Amb due to out of area communication - will consider for inclusion in secondary feed.

6/6/20 Blacklisted 57905 VMED28 Patch & 52034 VMED28 - will consider for inclusion in secondary feed.

6/6/20 - Blacklisted 57902 VLAW31 Patch & 57903  PT to PT Patch, BH talkgroups 40703, 40702, 40710, 10703, 10704, 10705, 10702, 50721.  - will consider for inclusion in secondary feed.

6/5/20 - Blacklisted hospital talkgroups eliminating ER communication - will consider for inclusion in secondary feed on my own server.

6/1/20 - User kodka11 inquired about the hardware config and also wanted me to be aware of the Broadcastify terms of service which I have been disregarding to include ER communication during the COVID-19 outbreak.

6/1/20 - Users peaked at 297 with the heightened awareness around potential looting and civil unrest.

5/28/20 - A user n0zjt complained about ER communication and system maintenance talkgroups inclusion in the feed. 

5/27/20 - A user Alex Langer has complained of anomalies in the audio, to address this I will be purchasing a directional antenna. The assumption is these warbles or hiccups could be related to receiving from multiple simulcast towers. I feel it is listenable in its current form but will explore this option to see if I can do better for the users. Upgrades are expected around June 3rd, 2020.

5/26/20 - Blacklisted additional encrypted channels.

5/24/20 - At peak there were 37 listeners today, the most since coming online 1 week ago. The new headless pi4 has now been running without issue for 48 hours and looks to be stable. 

5/23/20 - Retimed alpha tags in an attempt to better synchronize with the audio.

5/22/20 - Service taken offline briefly at midnight to swap hardware and enable alpha tags. You will now see talkgroup ID's when the scanner is latched on a talkgroup. I have moved everything to a headless pi4 device for uninterrupted 24/7 operation and will monitor stability. Now using liquidsoap as the streaming application for op25.

5/19/20 - Service is stable and the stream is made public

5/17/20 - Service brought online for testing - cake day!

ScanCR Overview

Linn County, Iowa, fire and EMS live audio feed including Cedar Rapids and surrounding communities. My goal is to include useful unencrypted SARA network talkgroups from the Linn County Simulcast, I have blacklisted encrypted police and sheriff traffic along with unencrypted operations communication, leaving mostly fire and EMS in the stream. I recently moved here and noticed there wasn't a feed provider so I learned the tech and set this up.


Linux based HP t620 thin client pc with open source scanning software OP25 tuning w/NooElec NESDR Smart v4. System and network connectivity on battery backup for 24/7 dedicated service.

50001 IA CALL 1 Iowa State Patrol - Simulcast
50002 IA TAC 2 Iowa State Patrol - Simulcast
50061 ISICSR6 CALL 61 Iowa State Patrol - Simulcast
52000 PT to PT Johnson County
52002 CR ISP LEA Johnson County
52030 VFIRE21 Johnson County
52031 JC Fire Aid Johnson County
52034 VMED28 Johnson County
52036 EMS F2 Johnson County
52060 JC Roam 1 Johnson County
52061 JC Roam 2 Johnson County
52062 John EMA Johnson County
52073 JC 7TAC73 Johnson County
52100 JC Event 5 Johnson County
52101 JC Event 6 Johnson County
52102 JC Event 7 Johnson County
52103 JC Event 8 Johnson County
52104 JC Event 9 Johnson County
52111 JC DPW Johnson County
52112 SE Ops 1 Special Events
52113 SE Tac 1 Special Events
52114 SE Fire Special Events
52115 SE Tac 2 Special Events
52123 JC Fireground Johnson County
57031 Linn Fire 1 Linn County
57032 Linn Fire 2 Linn County
57033 Linn Fire 3 Linn County
57034 Linn Fire 4 Linn County
57035 Linn Fire 5 Linn County
57036 Linn Fire 6 Linn County
57041 IW - Schools Linn County
57042 IW - Law Linn County
57043 IW - Media Linn County
57044 IW - Hosp Linn County
57045 IW - All Cal Linn County
57051 Linn Co EMA1 Linn County
57052 Linn Co EMA2 Linn County
57054 Hazmat CMD Linn County
57055 Hazmat 2 Linn County
57071 Alburnett Fr Linn County
57072 Cntr Pt Fire Linn County
57073 Cntrl CityFr Linn County
57074 Coggon Fire Linn County
57075 Ely Fire Linn County
57076 Fairfax Fire Linn County
57077 HiawathaFire Linn County
57078 Lisbon Fire Linn County
57079 Mt Vernon Fr Linn County
57080 MonroeTWP Fr Linn County
57081 Palo Fire Linn County
57082 PrairiebgFr Linn County
57083 Robins Fire Linn County
57084 Sprngvile Fr Linn County
57085 Troy MillsFr Linn County
57086 Walker Fire Linn County
57087 W Bertram Fr Linn County
57088 Cntr Pt Amb Linn County
57089 L-Mt V Amb Linn County
57090 NE Linn Amb Linn County
57091 Anamosa Fire Linn County
57092 Atkins Fire Linn County
57093 MartelleFire Linn County
57112 CRPD F2 Cedar Rapids
57117 Animal Ctrl Cedar Rapids
57118 CRPD 8 Cedar Rapids
57132 CRFD F2 Cedar Rapids
57133 CRFD F3 Cedar Rapids
57134 CRFD F4 Cedar Rapids
57135 CRFD F5 Cedar Rapids
57151 AREA Amb F1 Emergency Medical Services
57152 AREA AMB F2 Emergency Medical Services
57153 Area Amb F3 Emergency Medical Services
57231 Marion Fire1 Marion
57232 Marion Fire2 Marion
57233 Marion Fire2 Marion
57234 Marion Fire4 Marion
57235 Marion Fire5 Marion
57236 Marion Fire6 Marion
57901 VFIRE21 Patch Linn County
57904 Linn Co Fire Linn County
57906 EMS F2 Patch Emergency Medical Services
57908 DPS LAW 2D+ Iowa State Patrol - Simulcast
57909 Benton Sheriff Linn County
57910 Buchanan SheriffLinn County
57911 Cedar Sheriff Linn County
57912 Delaware SheriffLinn County
57913 Iowa Sheriff Linn County
57914 Jones Sheriff Linn County
57915 8CALL90 Patch Linn County
57916 8TAC92 Patch Linn County
57917 8TAC94 Patch Linn County
57925 Linn Co SAR Linn County
57928 Linn Co EMA Linn County
57951 ICS 1 Linn County
57952 ICS 2 Linn County
57953 ICS 3 Linn County
57954 ICS 4 Linn County
57955 ICS 5 Linn County
57961 MC 1 Linn County
57962 MC 2 Linn County
57974 Fire Ops 1 Linn County
57975 Fire Ops 2 Linn County
57976 Fire Ops 3 Linn County

*I use a reductive process for talkgroups. All unencrypted traffic which exists on the Linn County Simulcast goes in the feed automatically unless blacklisted. No talkgoups are actually programmed per se and that is what makes the software I use special. This means as new talkgroups become available, you will hear them instantly. Also, you may hear traffic which I ultimately need to blacklist. Please contact me if you have questions, comments or concerns. 

Scott Abing -