Information
Official License - 2018
OFFICIAL MINUTES
TABLE TWO
TimeLine Reports on EOC HF Antennas
Reverse Chronological Order
(most recent first)
TimeLine Reports on EOC HF Antennas
Reverse Chronological Order
(most recent first)
| Date / Summmary | Link to Report |
| June 1 -- Measurements made after tower supporting rope raised significantly higher | June 1 2019 Report |
| May 18 - interference rapidly declines with distance from EOC; possible 2nd antenna (spectrum analyzer calibrated measurements) | May18th Report |
| May 14 - Coax= good; Noise environment = the problem; antenna impedances = way way low (roof interaction) (spectrum analyzer calibrated measurements) | May 14th Report |
| April -- initial spectrum analyzer spectral comparisons between noise signals at EOC versus residential home | See Table One below |
| March 23 - Comm tests across Gainesville largely failed from EOC without repeaters; HF antenna SWRs confirmed poor | Mar23 Investigations |
| Feb 22 - Confirmation of Noise measurements using receiver S-meter | Noise Measurements Feb 22 |
| Nov 28 2018 -- Initial confirmation of noise issue, using receiver S-meter | Nov28 Confirmation |
| Sept 2018 - Initial evaluation of newly installed antenna | Antenna Initial Eval |
| May 2018 - Consensus Antenna Design | Consensus Antenna |
Typical residential BuckMaster SWR Curves measured 2019 NW Gainesville
To make a quck comparison between the EOC results the Gibby household, this table presents the spectrums to compare:
Table One
INITIAL SPECTRUM ANALYZER COMPARISONS BETWEEN RESIDENTIAL AND EOC NOISE ENVIRONMENT
INITIAL SPECTRUM ANALYZER COMPARISONS BETWEEN RESIDENTIAL AND EOC NOISE ENVIRONMENT
| Gibby Houshold | EOC | |
| Antenna Signals 3MHz - 8 MHz Afternoon | Gibby Receiving Signals (many radio signals obvioius) | View the top, blue line here: EOC Receiving Signals (virtually no signals obvious and lots of broadband noise) |
| Building Internal electromagnetic RF fields (undesirable) | Nearly non-existent Gibby internal home fields: Gibby internal signals | significant electromagnetic fields inside EOC (1000 times stronger than at Gibby household) EOC fields internal |
Gibby E-Field Signals Baselines April 23
- 2-foot dipole wand; 3 kHz RBW; 0 att internal; preamp ON; 6db external attenuator; 3.5-4MHz; yellow trace is internal noise; purple is signal with all ham transmitters OFF
EOC E-Field Signals April 23
EOC E-Field Radio Room Floor 04232019
Gibby Antenna Signals Baselines [Siglent Spectrum Analyzer]
April 23
3.5-4.0 Mhz 5:30 AM Baseline
3-8 MHz 5:30 AM Baseline
-20 dBm Tracking Generator Calibration
Gibby1815 3-8MHz tuned for 40m
EOC Antenna Tune For 80/40 Meters
(blue tuned for 40)
EOC Antenna Tuned 80(purple) 40(blue)
MARCH 23 2019 EOC Comm Measurements
Feb 2019 EOC Interference Measurements
EOC Initial Antenna Installation Measurements
NF4AC
Contact InformationSecretary
Gordon Gibby MD
[email protected]
Trustee -- Jeff Capehart W4UFL
Reference Information
Experimental Google Alachua County Map
Black 145.030
Yellow 145.070
Green 145.770 (SEDAN)
AlachuaCountyNodeMap
Marion County Packet Map
BPQ Packet Node Map
BPQ Chat Node Map
HF FORWARDING TEST
CARRIED OUT 4/5
Test Results (PDF)
Marion County ARES
BREVARD COUNTY ARES
2017 EOC Antenna Recommendations
Feb2018 EOC Ant Letter
Alachua County InterClub Facebook
Alachua County InterClub Web
GARC Online Calendar
Black 145.030
Yellow 145.070
Green 145.770 (SEDAN)
AlachuaCountyNodeMap
Marion County Packet Map
BPQ Packet Node Map
BPQ Chat Node Map
HF FORWARDING TEST
CARRIED OUT 4/5
Test Results (PDF)
Marion County ARES
BREVARD COUNTY ARES
2017 EOC Antenna Recommendations
Feb2018 EOC Ant Letter
Alachua County InterClub Facebook
Alachua County InterClub Web
GARC Online Calendar
Educational Articles
How to wire your station for digitalPrimer on FLDIGI
WINLINK Primer
Homebrew 2 meter SLIMJIM Antenna Construction
Raspberry Pi Packet Server
Example linbpq config file
Raspberry Pi USB Lockup Fix
$10TNC Introduction
Creating Private Residential Packet Backbone
QST: EMP Protection
DHS 2016 EMP Protection Recommendations
Katrina: Communications Failures
Useful Emergency Equipment
How to Use WINLINK without WINDOWS at ALL
Soundmodem/audio configuration how-to
Baluns & RFI-Ham Educational Treatise
BALUNS --- Part One
BALUNS--Part Two
HOW-TO document for making baluns
MESH & other info about BPQ
Advanced BPQ node commands from John Wiseman #1
More Updated Advanced Node commands from John Wiseman #2
RaspberryDeliverySheet (pdf)
EasyTerm Tutorial
SSTV Applications
Power over Ethernet in the Field
Changes to reduce Raspberry server WRITES
ConfiguringHFForwardingRMSGateway
Primer on WINLINK "connect"scripts
EchoLink Over Raspberry PI
D-Rats Publlished Manual
D-RATS over AX.25 Alachua Ares Handout
ICS Positions / Nomenclature
EMP Resources
SB-100 EMP PROOF RIG SPECIFICATION
QST: EMP Protection
Comm Acad (Wash state) Nuclear/EMP Lecture
Harris Cty TX ARES: EMP protection
1987 Telecomm EMP Survivability Assessment (DTIC)
Suggested by a state official:
Washington Examiner - EMP
Oct 2017 - Vincent Pry
TRAFFIC TRAINING
ARRL Traffic Manual
RRI DTN (Digital Traffic Net) White Paper
2018 Symposium Task Solutions (Suggestions)
Task 1: Stand up Command Net
Task 3: AM Emergency Broadcasting for EOC
Task 4: Emergency Contact to the State EOC
Task 8: Emergency FM NWS Broadcast for EOC
LINKS TO DIGITAL RESOURCES
Sarasota Emergency Radio ClubWINLINK
Terrestrial Packet Radio Network
TAPR (Tucson)
SATERN digital net primer
youtube: checking into DAREN
LINKS TO BUILDING RESOURCES
Kits And Parts Dot Com
QRP Kits -- nice stuff
QRP Labs
QRP Guys -- cheapest stuff!
DigiKey -- EVERYTHING parts wise
PROPAGATION
World Map of Critical Frequencies
HF BEACON FREQUENCIES
Eglin AFB ionosonde
Texas Army Mars HF Ionosphere Data
Map of BEST FREQUENCIES RIGHT NOW
Educational Info on Bands / Available Data
Ports Blocked by COX CABLE
HSEEP Exercise Creation Manual
State of Florida Comprehensive Emergency Management Plan
EQUIPMENT DESIGN
50W HF MOSFET amp
Designing LC low-pass RF filters
Common Me Balun Chokes
WA2EBY Amp Build
ALE
Startup Suggestions
Hurricane Shelter---Problems!
BITX Resources
Manual for uBitx 3rd party software
Emergency Comms Resources
Shelter Reference Book (of forms etc)
BLANK RADIOGRAM
LabNLunch Projects
LightningEMPArrestor
OCF Dipole Balun Construction