DX View 
                   
                  QSL.net
                    Propagation 
                 
                 
                   
                   
                      
                    
                     
                     
                     Understanding Propagation 
                    NOAA
                      Geomagnetic Disturbance Real Time Maps  
                    Dr. Tamitha
                      Skov  
                   
                   
                  Contact Me:
                  W7ACP 
                
                 
                
                  Welcome to South Western
                      IDAHO
                  
                  South Western
                      Idaho has a very wide range of terrain,
                      vegetation, wildlife and climate.  Here in
                      Caldwell, we are at the Western end of the
                      Treasure Valley, formed initially when the
                      Yellowstone 'hot spot' was located here.  As
                      the Yellowstone caldera has moved (well, the
                      effect of the caldera moved on the surface - most
                      likely the hot spot stood still and the Earth's
                      crust moved over it.), the mountains created by
                      tectonic action in the collision of the North
                      American Plate with the Juan DeFuca Plate were
                      'melted' by the hot spot.  The modern day
                      result is a valley running from the Oregon-Idaho
                      border toward the Southeast to just North of the
                      Idaho-Nevada border then turns Northeast toward
                      the present day location of the Yellowstone hot
                      spot in Montana.  This valley is surrounded
                      on all sides by the Rocky Mountains or its cut-off
                      remains in the ancient Owyhee Range.  The
                      valley floor is around 2,400 feet above sea level
                      (at my location) while the surrounding mountains
                      and ridges run to about 6,000 ft to the South and
                      8-9,000 ft to the north.  This has created a
                      very unique weather pattern for the valley, where
                      storms coming toward us from the West typically,
                      dry out as they leave the Owyhee's (to our South),
                      and start precipitation again when they hit the
                      Rocky's to our North, leaving us with an average
                      of 11 inches of rain and 8 inches of snow annually
                      while Idaho City, just a few miles away in the
                      foothills of the Rocky's receives an average of 27
                      inches of rain, and McCall, several miles to our
                      North and well within the Rocky Mountains receives
                      over 25 inches of rain and a whopping 138 inches
                      of snow annually.  All of that describes how
                      the Treasure Valley and the Magic Valley are an
                      agricultural paradise.  Lots of water (from
                      all that mountain snow), long growing seasons, and
                      when the fates allow, nearly 5 months of
                      continuous 'perfect' weather. All we need to be a
                      'destination' would be to have an ocean beach ...
                      but alas, what we have is called a 'High
                      Chaparral' where grass, sage brush and the
                      invasive Russian Thistle (tumble weed)
                      thrive.  Where the land is not in active
                      farming we have endless tracts of 'BLM' (Bureau of
                      Land Management) controlled land that is generally
                      accessible to the public while also available for
                      ranching and in some places it is home to herds of
                      wild horses.  My wife and I love to take
                      trips out into the desert (excuse me 'High
                      Chaparral') to see the sights, smell the smells,
                      and meet the wild or nearly wild life of the area. 
                  Some photos we
                      have taken from around the area click here. 
                      
                 
                 
                   
                  Station Equipment 
                    
                   
                  
                  HF Radio & RF Path 
                  
                  
                
                
                  Alinco DM-430T Switching 12v 30A
                        Power supply.
                    Yaesu FTDX10 HF/50MHz 100W
                        Hybrid SDR Transceiver
                    Morgan
                            Systems M-400X Broadcast Band Filter
                          3.5-5.4Mhz 200W 50 ohms (www.surgestop.com)
                          Updated 12/03/2021.
                     The various wave traps and
                          other AM BCB filters did not appear to work in
                          part because I was looking in the wrong
                          place.  FT8 being a 'weak signal'
                          protocol was not dramatically affected (or so
                          I thought), and when I was looking for other
                          signals (mostly SSB) I wasn't finding
                          them.  A big part of the reason was that
                          I had a lot of additional RFI from local
                          sources that had not been attenuated and these
                          sources signatures appeared to be IMD
                          (repeating equal frequency spacing). 
                          After dealing with those, using the Palomar
                          RFI KIt (below), the Morgan M-400X was exactly
                          what was required to clean up the
                          remainder.  The difference was a very
                          dramatic doubling of the number of FT8 decodes
                          per period, and noise levels of S6 on 40M, S5
                          on 30M, S4-5 on 20M, S0.5 on 17M, S0.5 on 15M,
                          S0.5 on 12M, S1 on 10M and S0.5 on 6M. 
                          The increased ability to scan the band and
                          observe RTTY and SSB was very dramatic. 
                          There are still discrete RFI signals of both
                          single frequency and 'fuzzy' throughout the
                          entire spectrum, some come from one (and only
                          one) of my two Windows monitors (Scepter 20"),
                          and as yet undiscovered sources.  The
                          monitor's power cable has 3 turns through a
                          1/2" Ferrite (Fair-Right V0) which does reduce
                          much, but not all of the noise from that
                          source.  I think what I'm seeing is a
                          signal generated within the monitor, and given
                          the low cost of the monitor plus the low
                          degree of interference I'm going to call that
                          a win.
                    Palomar
                            Engineers Coax Noise Filter CMNF-500-50GB
                          <= 38dB rejection of common mode current
                          1-60Mhz.
                    Palomar
                            Yaesu FTDX10 Transceiver RFI Kit 8
                          RFI/Noise Reduction Filters 3 ea. ring and 5
                          ea. 1/2" snap on beads.
                    NOTE: When placing the 1/2"
                          snap on beads; take two or three turns of
                          wires through the center then gently close the
                          bead while watching the receiver, as the
                          magnetic field couples you will notice the
                          effect in reduced noise.  If you have the
                          wire length (and diameter) to take more turns
                          its easy to adjust and test.  When
                          satisfied snap the bead shut.  As a
                          practical matter, try snapping a bead shut and
                          getting it open again without any wire to see
                          how it's done, once in place it may be
                          difficult to determine.  In my case, the
                          Scepter monitor power supplies were creating a
                          lot of noise, and five turns in each power
                          lead quieted the noise down to about 5.5dB
                          (+24.5dB on the FTDX10's waterfall).
                    NOTE: DC Power leads that came
                          with the radio are quite long (about
                          6').  I installed the RFI Torroids with
                          14 turns through the center, all in the same
                          direction.  All of the ferrite chokes are
                          installed as close to the radio as is
                          practical.  I installed one of the 1/2 ID
                          beads on the USB cable (from the computer for
                          CAT control and audio), I even put a choke on
                          the CW key line!
                    MFJ
                            993B IntelliTuner Automatic Antenna
                          Tuner.
                     NOTE: I really like this
                          tuner!  The FTDX10 has an internal tuner
                          that can do quite wide match, but this tuner
                          can do so much  more it makes it worth
                          the additional expense.  It has made my
                          intentionally non-resonant 95.375 foot antenna
                          wire (connected through the Palomar 'Bullet'
                          9:1 UNUN) functional on 80M through 10M and it
                          provides a 1:1 match to the radio most of the
                          time.  What it's doing is coupling the
                          transmitters power into the transmission line,
                          UNUN and antenna.  Very little reflected
                          power toward the radio.  All that power
                          is either radiated as RF or as heat in the
                          antenna system.  So far it appears to be
                          radiating RF far more than heat, as I
                          increased my 'footprint' as seen on PSK
                          reporter significantly.  
                    MFJ 1708B-SDRS SDR
                        Receiver TR Switch
                     NOTE: This switch makes it
                        possible to run the RSP1a as a spectrum analyzer
                        looking at the output of the radio.  It
                        also allows the SDR to be used to observe a wide
                        spectrum of frequencies while operating the
                        transmitter.
                    MFJ 1701 6 port Antenna
                        Switch common through NI4L
                          HF Choke Line Isolator (CM choke) to reduce
                          RFI.
                    SDR Play RSP1a (Software: SDR Uno) connected
                            through the TR switch to allow receive
                            operation even when transmitting from the
                            FTDx10.
                    MFJ-1026
                              DELUXE NOISE CANCELING SIGNAL ENHANCER
                     This device uses a sense
                            antenna and amplifiers to invert local noise
                            signals and add them back into the receiver
                            antenna input during receive.  It has a
                            built in TR switch that apparently MFJ is
                            not very confident in, but my transceiver
                            doesn't have a distinct TR output that is
                            easily accessible, so I'm relying on the
                            built in.  Turns out that on my unit
                            the T/R Delay must be set to 0 (full CCW)
                            versus the 10 (full CW) the manual specifies
                            to allow the TR relay to drop out at
                            all.  Many YouTube videos describe the
                            operation of this unit, and a few even
                            discuss the sense antenna, but rarely do
                            they delve deeply into how it works.  I
                            intend to write up my experience as an
                            article on this web site, but for now, my
                            experience is that if you have an end fed
                            half wave antenna as your main antenna, you
                            are going to want a similar antenna as a
                            sense antenna.  If you want to use this
                            device to reduce AM Broadcast Band
                            interference, it is essentially useless, and
                            if you want to use it to mitigate left over
                            local noise it might be possible, but it's
                            going to be difficult to setup and may need
                            to be changed as often as you change
                            bands.  At the moment I'm thinking of
                            removing it, but I put it in front of the
                            SDR, so I'm might leave it in the circuit
                            for a bit to investigate using it with the
                            SDR to create a useful "PANADAPER".    
                 
                
                  
                   
                   
                  Antennas
                  
                
                
                    
                   
                  
                    
                   
                  
                    
                   
                
                  
                  
                    Narrowband Antennas
                   
                  
                
                
                  Wolf
                          River Coils SOTA (Modified) tunable
                        vertical with ground plane 40M through 20M.
                   
                  
                     
                    
                  
                  TRAM
                          1480 VHF/UHF 6db colinear 5/8 wave,
                        mounted atop 8' of black steel 'fence top
                        rail'.  Connected directly to BTECH
                        UV-25X2. 
                  
                    
                  
                  
                  
                    
                  
                  HamStick antennas; 75, 40, 20,
                        15, 10 meter. 
                  
                    
                   
                  
                
                  
                    Uncategorized Antenna
                        Equipment
                   
                  
                    
                   
                  Jackite 31
                      ft telescoping fiberglass kite pole (good for
                    field day; getting a lightweight wire up, or general
                    stuff; pushing a network cable under). 
                   
                  
                    
                   
                  
                   
                  
                    Retired Antennas 
                       
                   
                   
                  
                 
                
                   Retired:
                          Alpha Antenna JPole Jr. 34'
                          End fed 'sloper' feed end at 30' AGL (Above
                            Ground Level) sloping to 10' AGL fed at
                          the North end with the wire sloping to the
                          South, so East/West should be strongest
                          signals, you would think, but read on!   
                   
                 
                  
                  
                 
                 
                  VHF/UHF Radio & RF Path
                  
                
                
                    
                    
                      
                   
                 
                
                  Computer & Data Path
                  
                
                
                  
                      
                    
                    
                      
                      
                    
                    
                    
                      
                    
                      
                      
                      
                    
                    
                      
                        
                    
                    
                      Mac Mini -
                          My office workhorse; produces the secure (LetsEncrypt) Internet
                          presence for this web site, (Apache HTTP Server)
                          publishes several MySQL
                          databases, handles all storage, video, html
                          editing, email, etc. 
                        
                    
                    
                      Retired: Acer Notebook -
                          configured primarily for Application
                          Generation with AppGini for MySQL databases. 
                      Retired: Toshiba Satellite
                            Notebook - configured primarily for Radio
                            Control with DxLabs, WSJT, and other radio
                            control software. 
                     
                 
                 
                
                    
                
                  
                  
                  Test Equipment
                  
                
                
                  Fluke 77 DVM (circa 1970, my old
                        friend!)
                    NANO VNA Network Vector
                        Analyzer
                    Looking for an inexpensive 100
                        Mhz dual trace storage oscilloscope. Thinking
                        about YEAPOOK ADS1014D among
                        others.
                     
                    NOTE: The RSP1a SDR makes a fine
                        spectrum analyzer to sample transmitted
                        signal.  My current antenna is selected by
                        a switch box, then routed through the MFJ 1708B
                        SDR TR Switch to the RSP1a and the Yeasu FT10Dx
                        transceiver.  When in transmit there is
                        just enough RF energy still present to provide
                        the RSP1a with a very usable sample.  Good
                        way to check for modulation and spurious
                        emission (my first harmonic is less than 30 db
                        down - GOOD!)  Tuning my audio card volume
                        and WSJT-X's power control shows that for FT8
                        mode I can run the selected audio card at full
                        volume, and the program power level at 100%
                        without distortion and that I do not have to
                        apply any wave shaping to produce a clean
                        transmit signal.
                     
                     
                    20210730 I captured this screen
                        shot from the Spectrum Analyzer app running on
                        the RSP1a.  Conditions: WSJT-x FT8 Tune
                        mode with transmit frequency set to 1000 Hz,
                        Power 100%, into Palomar 55 antenna, sampled by
                        RSP1a inline via MFJ 1708B.  First harmonic
                        is -33db 4th harmonic is -50.5db.  The
                        signal is averaged over 20 sweeps.
                       
                 
                
                  
                       
                     
                   
                  Yeapook ADS1014D
                      Oscilloscope 
                     
                   
                  
                  Software 
                    
                  
                
                
                  Skimmer (not until it
                        works with my SDR or another inexpensive
                        one).  Skimmer is expensive - but it could
                        be worth it since there are few reverse beacons
                        near me.  But not until I have a proven
                        antenna system ... 
                      
                    DXLabs - Best radio
                        control, DX, Contesting software, but it needs a
                        native CW decoder! 
                        NOTE: Replaced DXLabs with Ham Radio
                        Deluxe.  I'm anxiously awaiting Dr.
                        Carpenter's update to this software to display
                        the radio control as an image of my Yaesu
                        FTDx10.  In the mean time, I have updated
                        its database to MySQL, with Apache and PHP on
                        the AWOW computer.  It works adequately
                        fast even when Grid Tracker 2 is running in
                        conjunction with one or two Edge (web browser)
                        tabs open to PSK Reporter, QRZ and LOtW. 
                        If I open more tabs, the computer starts to run
                        into CPU utilization slowdowns. 
                        
                    WSJT - The best way to
                        'do' FT-8 etc.
                    JTAlert - Adds serious
                        functionality to WSJTx for things like 'worked
                        before' and 'Calling You'. 
                     
                    NOTE: As of July 2021 I have
                        configured WSJTx and JTAlert to cooperate and
                        control FT8, logging (both local and LoTW) and
                        spotting.  Working on how to automatically
                        and timely update LotW and QRZ logs.
                    PSKReporter
                     
                    CWGet  - Works off
                        the sound card, so it can work with DXLabs
                        Winwarbler.  
                      
                    CHIRP - Allows programming
                        HT's to the same channel (frequency) etc. even
                        if they are different model numbers from
                        different manufacturers. But its a bit 'clunky'
                        - I may have a look at creating the same
                        functionality using some other tools and
                        database(s). 
                 
                
                  
                  
                  
                
             | 
          
          
            
              
                Project List 
               
               Antenna Analysis 
                 VNA analysis of my
                  antennas - or - Learning how to use VNA Windows
                  software. 
                  4NEC2 modeling and analysis of antennas and antenna
                  design ideas. 
                  
                 Antenna
                      Install and Test 
                
                
                  -  Using a 30' flag pole to
                      'fly' a wire antenna and stay under the radar
                      (maybe).
 
                      As well as how well it works, and how much
                      sensitivity it has to installation direction.  
                      NOTE: This project is mostly complete.  The
                      Palomar 'Bullet' and 95.375 ft #14 THHN wire
                      antenna is designated antenna 'P95'. 
                  
                  - Using two 17M 'Hamstick'
                      antennas to form a vertical dipole, model and
                      test.  
 
                     
                  
                    - If this works as I think it
                        will, these should make an ok DX antenna.
 
                    - Based on results, construct
                        a self supporting, vertical half wave 40M
                        antenna, then add additional vertical half wave
                        antennas to the structure to create a multi-band
                        40M-10M antenna with low radiation angle. 
 
                       
                    - Cut for FT8 operation,
                        these are the half wave antenna lengths:
 
                       
                    
                      - 40M 66.00'
 
                      - 30M 46.12'
 
                      - 20M 33.22'
 
                      - 17M 25.83'
 
                      - 15M 22.18'
 
                      - 12M 18.75'
 
                      - 10M 16.65'
 
                     
                    - 4Nec2
                          Analysis HamStick
 
                    - 4Nec2
                          Analysis VDipole
 
                       
                   
                 
                 
                
                 
                
                  - Relative ERP map by
                      skimmer/beacon.  
 
                     
                  
                 
                 Comparison to Wolf SOTA vertical
                  and other antennas. 
                   
                  Transact (or something) the DXLabs and WSJTx MS Access
                  log databases on JWIN into MySQL tables on JMAC so I
                  can archive, and manipulate, display etc. outside of
                  the applications.  See if AppGini can ingest
                  'em?  Otherwise use Open Office Db to enumerate
                  and export? 
                   
                  One Click Reports I want to write: 
                
                
                  - List today's QSO's by time.
 
                  - List today's QSO's by band
                      and distance.
 
                  - List states & countries
                      QSO'd today.
 
                  - List outstanding QSL's.
 
                  - List QSL's by date/time.
 
                     
                 
                   
                  Shack
                      Grounding  
                
                
                  - Ground rod installed &
                      connected - working on eliminating noise and KCID
                      AM before I write it all up.  The ground rod
                      is connected to a 'loom' which is usually found
                      inside an AC distribution panel, but in this case
                      is screwed directly to the wall behind the
                      desk.  There are 9 positions, one ground
                      wire/equipment per.  Currently using 1 for
                      the ground rod, and 4 for equipment grounds.
 
                  - I have found a bit of a
                      difference in potential between the 3rd wire
                      ground and the ground rod.  I've made up a
                      jumper and plug that allows me to easily bond the
                      two grounds for testing and evaluation.  So
                      far I have found no significant effect one way or
                      the other. 
 
                     
                  - Pending:
 
                     
                  
                    -  Lightning Ground
 
                       
                    - Signal Ground
 
                    - EMI Ground and Shielding
                        (I've got a great large (1490Khz/1KW) KCID AM
                        ground wave transmitter 500 yards to my
                        East).  Working with Palomar Engineering to
                        get the RF (both mine and KCID's) on the coax
                        shield stopped before it gets to the radio using
                        filters and chokes.
 
                       
                   
                 
                Radio Continuity of Operation 
                   
                
                  - New battery for UPS
 
                  
                    - Power OP strip from UPS
                        (JMac & display, JWin & displays, ext
                        drives, HF, VHF & UHF radios, HT charger.
 
                   
                 
                
                  - New automotive/deep cycle
                      battery for transmitter(s)
 
                  
                    - Solar charger.
 
                    
                      - Recharge all radio and
                          UPS batteries.
 
                         
                     
                    - Switch radio over from
                        commercial to battery.  Temporary immediate
                        phone, CW only.
 
                    - Generator
 
                       
                    
                      - Switch house (RV) and
                          entire shack to generator (change 50A and 30A
                          source from commercial to genset), consider
                          FrostKing heat tapes etc. Temporary all modes.
 
                     
                   
                 
                Reduce QRM on 160, 80, 11, 10
                    meter bands due to KCID and general noise. 
                   
                DMR Digital Mode Radio 
                
                  ICOM ID-51 Docs 
                       
                 
                Delta
                        Loop Antenna(s) 
                      
                
                
                Completed Projects
                
                
                  
                
                
                |