W6IWI is Mobile or Portable Only!

Louise (XYL) and I are moving from Arvada CO to Tucson AZ. So, the Arvada station is now in a storage unit. I will still be operating mobile SSB and FM with the Icom 7100 and portable (operating the mobile Icom 7100 from within an Airbnb or our new home).




Favorite band, image from the cover of a recent CRHS Journal, Solar-Terrestrial Data showing conditions for HF and VHF bands and the MUF for Boulder CO, the W6IWI QSL card, view of antenna ("Wow! You must have a really big TV"), view of W6IWI Mobile. The Optimal Working Frequency is about 0.85 times the Maximum Usable Frequency.

Search W6IWI:

The call letters W6IWI were first used by Kauko Hallikainen in the 1930s. See the 1934, 1936, 1937, and 1938 Amateur Radio Callbook. The 1930s QSL card was similar to that shown above (I may still have one of the originals somewhere). By 1952, the call had been reassigned to Carson Donaldson in Inglewood CA. He held it through 1977. I acquired the call in 2016. Prior to that, I held the call WA6FDN, and prior to that, WN6FDN. The WA6FDN license was first granted in 1969, with WN6FDN in 1968. WA6FDN shows up in the Summer 1969 Callbook. NL7XM offers a great service. He has over 100 years of Radio Amateur Callbooks and will find the first appearance of your callsign in the Callbook. For a reasonable cost, he'll provide certified copies of these pages verifying that the callsign was held by the particular person on this date. This is what he sent me for WN6FDN and WA6FDN.

WN6FDN started with a Heathkit DX-60 transmitter and a National NC-300 receiver running CW on HF. WA6FDN used a Viking Ranger transmitter running AM, CW, and RTTY on HF. RTTY used a Teletype model 15 printer (also see a slow motion video of a model 15 in operationg), and a model 14 typing reperf and transmitter distributor. W6IWI now uses an SEA 245 with a Dentron Clipperton-L amplifier running CW and SSB into a Cushcraft A3S with 40 meter adapter. Previosly, a HyGain TH-3JRS 3 elemement tri-band (10, 15, 20) beam was used. Finally, an inverted V for other bands (other than 40, 20, 15, and 10). VHF and UHF FM are covered with a Baofeng UV-5R and a Wouxun KG-UV-6X. The Wouxun KG-UV-6X normally drives an outside vertical antenna at home. Mobile info is here.

HF Station Details

Click in a box in the block diagram for more details. Antenna VSWR is tracked here. Your browser does not support the HTML5 canvas tag. ; // routines for block diagrams

Maximum Usable Frequency (16.46 MHz at 15 Jun 2021 2301 GMT)

The graph below plots the Boulder CO MUF and OWF over time (times are local at the browser). Data courtesy of Paul N0NBH. The MUF is the maximum frequency that can be used over a 3,000 km path centered on Boulder CO. The optimal working frequency is 0.85 times the MUF. Due to the large amount of data in the graph, it is pretty crowded. Zoom into a date range for a closer look. Drag over an area with the left mouse button down to zoom to that area. Right click to go back to the full graph.

W6IWI HF Activity

The table below shows recent contacts logged on qrz.com.

RBN Report

The table below is generated by a PHP script that pulls JSON data from the Reverse Beacon Network, parses it, calculates distance and bearing based on latitude and longitude, then shows data for the last 250 spots. Frequency changes greater than 1 kHz or time changes greater than 1 hour are shown in bold. The Rx links link to the QRZ page for the station. The SNR links link to a graph of signal to noise ratio versus time for that receiver and band (data limited to 250 spots total from RBN)

The background color is green if the distance is greater than 3,000 miles. The Relative Distance column has a * for every 200 miles.

TimeRxFreq (kHz)SNRModeSpeedRx LocationDistance and BearingRelative Distance
0339z 24 JunVE2WU 14049.0 19 dB CW15 wpmCovey Hill, QC3469 km (2155 miles) at 55 degrees**********
0339z 24 JunW8WWV 14049.0 16 dB CW15 wpmChesterland, OH2802 km (1741 miles) at 60 degrees********
0337z 24 JunVE6WZ 14049.0 15 dB CW15 wpmCalgary, AB2196 km (1364 miles) at 353.4 degrees******
0329z 24 JunW3UA 14049.1 22 dB CW16 wpmBedford, NH3632 km (2257 miles) at 59.5 degrees***********
0329z 24 JunVE2WU 14049.0 21 dB CW16 wpmCovey Hill, QC3469 km (2155 miles) at 55 degrees**********
0328z 24 JunVE7CC 14049.0 13 dB CW15 wpmMaple Ridge, BC2120 km (1317 miles) at 336.1 degrees******
0328z 24 JunW4KAZ 14049.0 13 dB CW15 wpmCary, NC2969 km (1845 miles) at 73.5 degrees*********
0327z 24 JunW8WWV 14049.0 16 dB CW15 wpmChesterland, OH2802 km (1741 miles) at 60 degrees********
0327z 24 JunKM3T 14049.0 21 dB CW15 wpmAmherst, NH3617 km (2248 miles) at 59.6 degrees***********
0327z 24 JunKO7SS-7 14049.0 13 dB CW15 wpmMt. Lemmon, AZ23 km (14 miles) at 18.1 degrees
0326z 24 JunW1NT-6 14049.0 10 dB CW15 wpmNewton, NH3665 km (2277 miles) at 59.6 degrees***********
0326z 24 JunKM3T-2 14049.0 20 dB CW15 wpmAmherst, NH3617 km (2248 miles) at 59.6 degrees***********
0326z 23 JunWA7LNW 7123.0 18 dB CW15 wpmWashington, UT593 km (368 miles) at 338.8 degrees*
0333z 22 JunN6TV 7122.0 13 dB CW15 wpmSan Jose, CA1141 km (708 miles) at 302.1 degrees***
0329z 22 JunK2PO/7 7122.0 14 dB CW15 wpmPortland, OR1795 km (1115 miles) at 327.8 degrees*****
0329z 22 JunWB6BEE 7122.0 12 dB CW16 wpmPagosa Springs, CO656 km (407 miles) at 31.9 degrees**
0329z 22 JunNC7J 7122.0 9 dB CW15 wpmLayton, UT987 km (613 miles) at 354.3 degrees***
0254z 19 JunK2PO/7 7110.0 12 dB CW16 wpmPortland, OR1795 km (1115 miles) at 327.8 degrees*****
0253z 19 JunK5TR 7110.0 8 dB CW15 wpmAustin, TX1215 km (755 miles) at 97.2 degrees***
0253z 19 JunNC7J 7110.0 18 dB CW15 wpmLayton, UT987 km (613 miles) at 354.3 degrees***
0253z 19 JunWA7LNW 7110.0 23 dB CW15 wpmWashington, UT593 km (368 miles) at 338.8 degrees*
0211z 19 JunKU7T 7119.0 15 dB CW15 wpmNorth Bend, WA1930 km (1199 miles) at 334.6 degrees*****
0211z 19 JunNC7J 7119.0 17 dB CW15 wpmLayton, UT987 km (613 miles) at 354.3 degrees***
0206z 19 JunWA7LNW 7119.0 23 dB CW16 wpmWashington, UT593 km (368 miles) at 338.8 degrees*
0134z 27 MayWA7LNW 14035.0 18 dB CW13 wpmWashington, UT593 km (368 miles) at 338.8 degrees*
0134z 27 MayKO7SS-7 14035.0 21 dB CW13 wpmMt. Lemmon, AZ23 km (14 miles) at 18.1 degrees
0134z 27 MayW3UA 14035.1 18 dB CW13 wpmBedford, NH3632 km (2257 miles) at 59.5 degrees***********
0134z 27 MayVE7CC 14035.0 5 dB CW13 wpmMaple Ridge, BC2120 km (1317 miles) at 336.1 degrees******
0134z 27 MayW3OA 14035.0 15 dB CW13 wpmMooresville, NC2774 km (1724 miles) at 74.1 degrees********
0131z 27 MayKC0VKN 14035.0 20 dB CW13 wpmOxford, IA1985 km (1233 miles) at 52.8 degrees******
0131z 27 MayW6YX 14035.0 14 dB CW13 wpmStanford, CA1182 km (734 miles) at 302.2 degrees***
0129z 27 MayK9TM-4 14035.0 10 dB CW13 wpmSylvania, OH2824 km (1754 miles) at 94.6 degrees********
0129z 27 MayVE6WZ 14035.0 12 dB CW13 wpmCalgary, AB2196 km (1364 miles) at 353.4 degrees******
0129z 27 MayN4TVC 14035.0 3 dB CW13 wpmBurke, VA3106 km (1930 miles) at 67 degrees*********
0129z 27 MayW2NAF 14035.0 13 dB CW13 wpmSpring Brook, PA3272 km (2033 miles) at 61.8 degrees**********
0129z 27 MayKU7T 14035.0 15 dB CW13 wpmNorth Bend, WA1930 km (1199 miles) at 334.6 degrees*****
0129z 27 MayKM3T 14035.0 19 dB CW13 wpmAmherst, NH3617 km (2248 miles) at 59.6 degrees***********
0128z 27 MayPJ2A 14035.0 12 dB CW13 wpmNetherlands Antillies4823 km (2997 miles) at 107.8 degrees**************
0127z 27 MayW1NT-2 14035.0 14 dB CW13 wpmNewton, NH3665 km (2277 miles) at 59.6 degrees***********
0127z 27 MayKV4TT 14035.0 10 dB CW13 wpmNorth Myrtle Beach, SC2991 km (1858 miles) at 77.8 degrees*********
0126z 27 MayW4KAZ 14035.0 6 dB CW13 wpmCary, NC2969 km (1845 miles) at 73.5 degrees*********
0126z 27 MayK2PO/7 14035.0 8 dB CW13 wpmPortland, OR1795 km (1115 miles) at 327.8 degrees*****
0126z 27 MayW2AXR 14035.0 14 dB CW13 wpmSyracuse, NY3044 km (1891 miles) at 57 degrees*********
0126z 27 MayKD7YZ 14035.0 8 dB CW13 wpmGreenup, KY2606 km (1619 miles) at 66.7 degrees********
0126z 27 MayKP2RUM 14035.0 18 dB CW13 wpmChristiansted, VI4881 km (3033 miles) at 97.8 degrees***************
0126z 27 MayVE6JY 14035.0 25 dB CW13 wpmLamont, AB2394 km (1488 miles) at 356.9 degrees*******
0124z 27 MayWE9V 14035.0 13 dB CW13 wpmBristol, WI2309 km (1435 miles) at 53.7 degrees*******
0124z 27 MayKM3T-2 14035.0 19 dB CW13 wpmAmherst, NH3617 km (2248 miles) at 59.6 degrees***********
0124z 27 MayKO7SS 14035.1 32 dB CW13 wpmMt. Lemmon, AZ23 km (14 miles) at 40.2 degrees
0124z 27 MayK5TR 14035.0 11 dB CW13 wpmAustin, TX1215 km (755 miles) at 97.2 degrees***
0124z 27 MayW9XG 14035.1 10 dB CW13 wpmMilan, IL2074 km (1289 miles) at 54.4 degrees******
0123z 27 MayVE7CC 14035.0 5 dB CW13 wpmMaple Ridge, BC2120 km (1317 miles) at 336.1 degrees******
0123z 27 MayW1NT-6 14035.0 14 dB CW13 wpmNewton, NH3665 km (2277 miles) at 59.6 degrees***********
0123z 27 MayNC7J 14035.0 11 dB CW13 wpmLayton, UT987 km (613 miles) at 354.3 degrees***
0123z 27 MayWA7LNW 14035.0 19 dB CW13 wpmWashington, UT593 km (368 miles) at 338.8 degrees*
0121z 27 MayW3OA 14035.0 11 dB CW13 wpmMooresville, NC2774 km (1724 miles) at 74.1 degrees********
0121z 27 MayK3PA 14035.0 13 dB CW13 wpmTonganoxie, KS1626 km (1010 miles) at 57.4 degrees*****
0121z 27 MayW3UA 14035.1 19 dB CW13 wpmBedford, NH3632 km (2257 miles) at 59.5 degrees***********
0121z 27 MayK9IMM 14035.0 16 dB CW13 wpmMount Horeb, WI2194 km (1363 miles) at 51.3 degrees******
0121z 27 MayKO7SS 14035.1 32 dB CW13 wpmMt. Lemmon, AZ23 km (14 miles) at 40.2 degrees
0121z 27 MayW6YX 14035.0 16 dB CW13 wpmStanford, CA1182 km (734 miles) at 302.2 degrees***
0121z 27 MayKO7SS-7 14035.0 21 dB CW13 wpmMt. Lemmon, AZ23 km (14 miles) at 18.1 degrees
0120z 27 MayKU7T 14035.0 12 dB CW13 wpmNorth Bend, WA1930 km (1199 miles) at 334.6 degrees*****
0120z 27 MayKM3T 14035.0 20 dB CW13 wpmAmherst, NH3617 km (2248 miles) at 59.6 degrees***********
0120z 27 MayKC0VKN 14035.0 19 dB CW13 wpmOxford, IA1985 km (1233 miles) at 52.8 degrees******
0119z 27 MayN6TV 14035.0 4 dB CW13 wpmSan Jose, CA1141 km (708 miles) at 302.1 degrees***
0119z 27 MayK9TM-4 14035.0 8 dB CW13 wpmSylvania, OH2824 km (1754 miles) at 94.6 degrees********
0118z 27 MayW2NAF 14035.0 12 dB CW13 wpmSpring Brook, PA3272 km (2033 miles) at 61.8 degrees**********
0116z 27 MayW1NT-2 14035.0 14 dB CW13 wpmNewton, NH3665 km (2277 miles) at 59.6 degrees***********
0116z 27 MayKV4TT 14035.0 4 dB CW13 wpmNorth Myrtle Beach, SC2991 km (1858 miles) at 77.8 degrees*********
0116z 27 MayPJ2A 14035.0 11 dB CW13 wpmNetherlands Antillies4823 km (2997 miles) at 107.8 degrees**************
0115z 27 MayKD7YZ 14035.0 7 dB CW13 wpmGreenup, KY2606 km (1619 miles) at 66.7 degrees********
0115z 27 MayW4KAZ 14035.0 6 dB CW13 wpmCary, NC2969 km (1845 miles) at 73.5 degrees*********
0115z 27 MayVE6JY 14035.0 12 dB CW13 wpmLamont, AB2394 km (1488 miles) at 356.9 degrees*******
0115z 27 MayKP2RUM 14035.0 15 dB CW13 wpmChristiansted, VI4881 km (3033 miles) at 97.8 degrees***************
0115z 27 MayW2AXR 14035.0 19 dB CW13 wpmSyracuse, NY3044 km (1891 miles) at 57 degrees*********
0113z 27 MayKM3T-2 14035.0 22 dB CW13 wpmAmherst, NH3617 km (2248 miles) at 59.6 degrees***********
0113z 27 MayW9XG 14035.1 9 dB CW13 wpmMilan, IL2074 km (1289 miles) at 54.4 degrees******
0112z 27 MayW1NT-6 14035.0 11 dB CW13 wpmNewton, NH3665 km (2277 miles) at 59.6 degrees***********
0112z 27 MayVE7CC 14035.0 7 dB CW13 wpmMaple Ridge, BC2120 km (1317 miles) at 336.1 degrees******
0112z 27 MayK5TR 14035.0 12 dB CW13 wpmAustin, TX1215 km (755 miles) at 97.2 degrees***
0112z 27 MayWA7LNW 14035.0 22 dB CW13 wpmWashington, UT593 km (368 miles) at 338.8 degrees*
0112z 27 MayNC7J 14035.0 13 dB CW13 wpmLayton, UT987 km (613 miles) at 354.3 degrees***
0112z 27 MayK1TTT 14035.0 19 dB CW13 wpmPeru, MA3498 km (2174 miles) at 60.1 degrees**********
0110z 27 MayW3OA 14035.0 11 dB CW13 wpmMooresville, NC2774 km (1724 miles) at 74.1 degrees********
0110z 27 MayAC0C-1 14035.0 18 dB CW13 wpmLouisburg, KS1632 km (1014 miles) at 59.6 degrees*****
0110z 27 MayK2PO/7 14035.0 6 dB CW13 wpmPortland, OR1795 km (1115 miles) at 327.8 degrees*****
0110z 27 MayKO7SS 14035.1 32 dB CW13 wpmMt. Lemmon, AZ23 km (14 miles) at 40.2 degrees
0110z 27 MayWE9V 14035.0 14 dB CW13 wpmBristol, WI2309 km (1435 miles) at 53.7 degrees*******
0110z 27 MayW6YX 14035.0 17 dB CW13 wpmStanford, CA1182 km (734 miles) at 302.2 degrees***
0110z 27 MayKO7SS-7 14035.0 21 dB CW13 wpmMt. Lemmon, AZ23 km (14 miles) at 18.1 degrees
0110z 27 MayW8WWV 14035.0 13 dB CW13 wpmChesterland, OH2802 km (1741 miles) at 60 degrees********
0110z 27 MayK3PA 14035.0 17 dB CW13 wpmTonganoxie, KS1626 km (1010 miles) at 57.4 degrees*****
0110z 27 MayW3UA 14035.1 18 dB CW13 wpmBedford, NH3632 km (2257 miles) at 59.5 degrees***********
0110z 27 MayWB6BEE 14035.0 29 dB CW13 wpmPagosa Springs, CO656 km (407 miles) at 31.9 degrees**
0110z 27 MayK9IMM 14035.0 17 dB CW13 wpmMount Horeb, WI2194 km (1363 miles) at 51.3 degrees******
0109z 27 MayKU7T 14035.0 11 dB CW13 wpmNorth Bend, WA1930 km (1199 miles) at 334.6 degrees*****
0109z 27 MayK9LC 14035.0 5 dB CW13 wpmRockford, IL2227 km (1384 miles) at 53.7 degrees******
0107z 27 MayN6TV 14035.0 5 dB CW13 wpmSan Jose, CA1141 km (708 miles) at 302.1 degrees***
0104z 27 MayVE6JY 14035.0 6 dB CW13 wpmLamont, AB2394 km (1488 miles) at 356.9 degrees*******
0104z 27 MayKV4TT 14035.0 4 dB CW13 wpmNorth Myrtle Beach, SC2991 km (1858 miles) at 77.8 degrees*********
0104z 27 MayKP2RUM 14035.0 19 dB CW13 wpmChristiansted, VI4881 km (3033 miles) at 97.8 degrees***************
0104z 27 MayW2AXR 14035.0 7 dB CW14 wpmSyracuse, NY3044 km (1891 miles) at 57 degrees*********
0104z 27 MayW1NT-6 14035.0 9 dB CW13 wpmNewton, NH3665 km (2277 miles) at 59.6 degrees***********
0102z 27 MayW2NAF 14035.0 6 dB CW13 wpmSpring Brook, PA3272 km (2033 miles) at 61.8 degrees**********
0102z 27 MayK9TM-4 14035.0 8 dB CW13 wpmSylvania, OH2824 km (1754 miles) at 94.6 degrees********
0101z 27 MayKD7YZ 14035.0 8 dB CW13 wpmGreenup, KY2606 km (1619 miles) at 66.7 degrees********
0101z 27 MayW4KAZ 14035.0 7 dB CW13 wpmCary, NC2969 km (1845 miles) at 73.5 degrees*********
0101z 27 MayVE7CC 14035.0 4 dB CW13 wpmMaple Ridge, BC2120 km (1317 miles) at 336.1 degrees******
0101z 27 MayPJ2A 14035.0 9 dB CW13 wpmNetherlands Antillies4823 km (2997 miles) at 107.8 degrees**************
0101z 27 MayWA7LNW 14035.0 22 dB CW13 wpmWashington, UT593 km (368 miles) at 338.8 degrees*
0101z 27 MayK5TR 14035.0 11 dB CW13 wpmAustin, TX1215 km (755 miles) at 97.2 degrees***
0101z 27 MayK1TTT 14035.0 13 dB CW13 wpmPeru, MA3498 km (2174 miles) at 60.1 degrees**********
0101z 27 MayNC7J 14035.0 14 dB CW13 wpmLayton, UT987 km (613 miles) at 354.3 degrees***
0059z 27 MayK9IMM 14035.0 14 dB CW13 wpmMount Horeb, WI2194 km (1363 miles) at 51.3 degrees******
0059z 27 MayKO7SS 14035.1 32 dB CW13 wpmMt. Lemmon, AZ23 km (14 miles) at 40.2 degrees
0059z 27 MayKO7SS-7 14035.0 20 dB CW13 wpmMt. Lemmon, AZ23 km (14 miles) at 18.1 degrees
0059z 27 MayW3OA 14035.0 11 dB CW13 wpmMooresville, NC2774 km (1724 miles) at 74.1 degrees********
0059z 27 MayW6YX 14035.0 17 dB CW13 wpmStanford, CA1182 km (734 miles) at 302.2 degrees***
0059z 27 MayKU7T 14035.0 8 dB CW13 wpmNorth Bend, WA1930 km (1199 miles) at 334.6 degrees*****
0059z 27 MayAC0C-1 14035.0 15 dB CW13 wpmLouisburg, KS1632 km (1014 miles) at 59.6 degrees*****
0059z 27 MayW8WWV 14035.0 13 dB CW13 wpmChesterland, OH2802 km (1741 miles) at 60 degrees********
0059z 27 MayW3UA 14035.1 11 dB CW13 wpmBedford, NH3632 km (2257 miles) at 59.5 degrees***********
0059z 27 MayWB6BEE 14035.0 32 dB CW13 wpmPagosa Springs, CO656 km (407 miles) at 31.9 degrees**
0059z 27 MayK3PA 14035.0 17 dB CW13 wpmTonganoxie, KS1626 km (1010 miles) at 57.4 degrees*****
0059z 27 MayWE9V 14035.0 20 dB CW13 wpmBristol, WI2309 km (1435 miles) at 53.7 degrees*******
0057z 27 MayW3OA 14035.0 12 dB CW13 wpmMooresville, NC2774 km (1724 miles) at 74.1 degrees********
0057z 27 MayK9LC 14035.0 7 dB CW13 wpmRockford, IL2227 km (1384 miles) at 53.7 degrees******
0057z 27 MayK9TM-4 14035.0 7 dB CW13 wpmSylvania, OH2824 km (1754 miles) at 94.6 degrees********
0056z 27 MayK1TTT 14035.0 12 dB CW13 wpmPeru, MA3498 km (2174 miles) at 60.1 degrees**********
0054z 27 MayW4KAZ 14035.0 6 dB CW13 wpmCary, NC2969 km (1845 miles) at 73.5 degrees*********
0054z 27 MayPJ2A 14035.0 8 dB CW13 wpmNetherlands Antillies4823 km (2997 miles) at 107.8 degrees**************
0053z 27 MayKP2RUM 14035.0 17 dB CW13 wpmChristiansted, VI4881 km (3033 miles) at 97.8 degrees***************
0051z 27 MayW8WWV 14035.0 15 dB CW13 wpmChesterland, OH2802 km (1741 miles) at 60 degrees********
0051z 27 MayK2PO/7 14035.0 2 dB CW13 wpmPortland, OR1795 km (1115 miles) at 327.8 degrees*****
0051z 27 MayW2NAF 14035.0 5 dB CW13 wpmSpring Brook, PA3272 km (2033 miles) at 61.8 degrees**********
0051z 27 MayWA7LNW 14035.0 22 dB CW13 wpmWashington, UT593 km (368 miles) at 338.8 degrees*
0051z 27 MayW6YX 14035.0 12 dB CW13 wpmStanford, CA1182 km (734 miles) at 302.2 degrees***
0050z 27 MayNC7J 14035.0 10 dB CW13 wpmLayton, UT987 km (613 miles) at 354.3 degrees***
0050z 27 MayK9IMM 14035.0 6 dB CW13 wpmMount Horeb, WI2194 km (1363 miles) at 51.3 degrees******
0049z 27 MayVE7CC 14035.0 5 dB CW13 wpmMaple Ridge, BC2120 km (1317 miles) at 336.1 degrees******
0049z 27 MayW2AXR 14035.0 7 dB CW13 wpmSyracuse, NY3044 km (1891 miles) at 57 degrees*********
0049z 27 MayAC0C-1 14035.0 18 dB CW13 wpmLouisburg, KS1632 km (1014 miles) at 59.6 degrees*****
0049z 27 MayKD7YZ 14035.0 9 dB CW13 wpmGreenup, KY2606 km (1619 miles) at 66.7 degrees********
0049z 27 MayK5TR 14035.0 15 dB CW13 wpmAustin, TX1215 km (755 miles) at 97.2 degrees***
0049z 27 MayW3UA 14035.1 12 dB CW13 wpmBedford, NH3632 km (2257 miles) at 59.5 degrees***********
0049z 27 MayWB6BEE 14035.0 24 dB CW13 wpmPagosa Springs, CO656 km (407 miles) at 31.9 degrees**
0049z 27 MayWE9V 14035.0 18 dB CW13 wpmBristol, WI2309 km (1435 miles) at 53.7 degrees*******
0049z 27 MayKO7SS 14035.1 32 dB CW13 wpmMt. Lemmon, AZ23 km (14 miles) at 40.2 degrees
0049z 27 MayKO7SS-7 14035.0 19 dB CW13 wpmMt. Lemmon, AZ23 km (14 miles) at 18.1 degrees
0022z 25 MayWE9V 14032.0 15 dB CW13 wpmBristol, WI2309 km (1435 miles) at 53.7 degrees*******
0022z 25 MayK9IMM 14032.0 13 dB CW13 wpmMount Horeb, WI2194 km (1363 miles) at 51.3 degrees******
0022z 25 MayW3OA 14032.0 17 dB CW13 wpmMooresville, NC2774 km (1724 miles) at 74.1 degrees********
0022z 25 MayKO7SS 14032.0 32 dB CW13 wpmMt. Lemmon, AZ23 km (14 miles) at 40.2 degrees
0022z 25 MayW1NT-2 14032.0 26 dB CW13 wpmNewton, NH3665 km (2277 miles) at 59.6 degrees***********
0022z 25 MayW8WWV 14032.0 19 dB CW13 wpmChesterland, OH2802 km (1741 miles) at 60 degrees********
0022z 25 MayKP2RUM 14032.0 17 dB CW13 wpmChristiansted, VI4881 km (3033 miles) at 97.8 degrees***************
0022z 25 MayK1TTT 14032.0 19 dB CW13 wpmPeru, MA3498 km (2174 miles) at 60.1 degrees**********
0022z 25 MayVE6WZ 14032.0 18 dB CW13 wpmCalgary, AB2196 km (1364 miles) at 353.4 degrees******
0017z 25 MayW9XG 14032.1 10 dB CW13 wpmMilan, IL2074 km (1289 miles) at 54.4 degrees******
0016z 25 MayW4KAZ 14032.0 27 dB CW13 wpmCary, NC2969 km (1845 miles) at 73.5 degrees*********
0016z 25 MayVE6AO 14032.0 11 dB CW13 wpmCalgary, AB2113 km (1313 miles) at 354.1 degrees******
0016z 25 MayW1NT-2 14032.0 36 dB CW13 wpmNewton, NH3665 km (2277 miles) at 59.6 degrees***********
0016z 25 MayK5TR 14032.0 22 dB CW13 wpmAustin, TX1215 km (755 miles) at 97.2 degrees***
0014z 25 MayK2PO/7 14032.0 9 dB CW13 wpmPortland, OR1795 km (1115 miles) at 327.8 degrees*****
0014z 25 MayN6TV 14032.0 5 dB CW13 wpmSan Jose, CA1141 km (708 miles) at 302.1 degrees***
0013z 25 MayK9LC 14032.0 18 dB CW13 wpmRockford, IL2227 km (1384 miles) at 53.7 degrees******
0013z 25 MayKD7YZ 14032.0 25 dB CW13 wpmGreenup, KY2606 km (1619 miles) at 66.7 degrees********
0013z 25 MayWE9V 14032.0 23 dB CW13 wpmBristol, WI2309 km (1435 miles) at 53.7 degrees*******
0011z 25 MayKO7SS-7 14032.0 16 dB CW13 wpmMt. Lemmon, AZ23 km (14 miles) at 18.1 degrees
0011z 25 MayW8WWV 14032.0 14 dB CW13 wpmChesterland, OH2802 km (1741 miles) at 60 degrees********
0011z 25 MayW6YX 14032.0 12 dB CW13 wpmStanford, CA1182 km (734 miles) at 302.2 degrees***
0011z 25 MayK1TTT 14032.0 14 dB CW13 wpmPeru, MA3498 km (2174 miles) at 60.1 degrees**********
0011z 25 MayAC0C-1 14032.0 11 dB CW13 wpmLouisburg, KS1632 km (1014 miles) at 59.6 degrees*****
0011z 25 MayVE6WZ 14032.0 14 dB CW13 wpmCalgary, AB2196 km (1364 miles) at 353.4 degrees******
0011z 25 MayKU7T 14032.0 17 dB CW13 wpmNorth Bend, WA1930 km (1199 miles) at 334.6 degrees*****
0011z 25 MayVE7CC 14032.0 8 dB CW13 wpmMaple Ridge, BC2120 km (1317 miles) at 336.1 degrees******
0011z 25 MayKO7SS 14032.0 36 dB CW13 wpmMt. Lemmon, AZ23 km (14 miles) at 40.2 degrees
0011z 25 MayW3OA 14032.0 20 dB CW13 wpmMooresville, NC2774 km (1724 miles) at 74.1 degrees********
0011z 25 MayKP2RUM 14032.0 20 dB CW13 wpmChristiansted, VI4881 km (3033 miles) at 97.8 degrees***************
0011z 25 MayK9IMM 14032.0 15 dB CW13 wpmMount Horeb, WI2194 km (1363 miles) at 51.3 degrees******

The plot below shows a historic plot of W6IWI HF CW and RTTY activity.

Also see here for a graphical representation of all RBN data. There is also a new version under development that shows similar graphs but also paths between transmit and receive sites on a map.

Search RBN for Your Station

Enter your call and click Submit to see what RBN has on you. This can be useful for testing different antennae. Transmit TEST DE CALLSIGN a few times on one antenna, switch to the other, change frequency a bit (maybe 100 Hz) and transmit again. You should see spots recorded at several locations for each antenna. Compare the reported SNR to get an idea how the different antennae perform. Click Show/Hide on the right side of the results page to enable a map with grayline showing the location of the receive sites. If your site is not shown correctly, update your location at QRZ.COM. Once logged in, select your call (right side of menu bar), then Edit your call, then Map, Grid Square and Coordinate settings. RBN uses these coordinates to place your station.

NOTE: RBN only reports CQ or TEST. It does not report every QSO. Send one of the following (I use CW and RTTY) to generate RBN spots:

Also, note that RTTY is only reported if it is at "tape speed." Hand typed RTTY is not reported.

Call Sign:

Voice of America Coverage Analysis Program

VOCAP for ham radio. Originally written for the Voice of America, this predicts the best frequency between two locations at a specific time. For more info, see www.vocap.com.

Find Hams in your Neighborhood

Amateur Radio License Map maps US amateur radio operators in an area centered on a call sign, grid square, zip code, or street address. Pretty neat!

The Ham Shack

Here's an overall view of the operationg position (a rolltop desk). On the top shelf ia a lamp with a mechanical watt-hour meter. On the base to the right is a more modern version, the Kill A Watt AC power meter that measures line voltage, frequency, load current, load power, load VA, power factor, and kWH (pretty amazing). To the right of that are the two VHF/UHF handheld radios (Wouxun KG-UV-6X and a Baofeng UV-5R). The Wouxon is used as a base station with an outside antenna and a speaker/microphone. To the left of the handheld radios, you can see a couple antennae for using the handhelds portable. Behind the handhelds is a black carrying case holding the SARK-110 antenna analyzer (another truly amazing instrument). To the right is the Dentron Clipperton-L with a pair of Daiwa 501H RF wattmeters on top. The left one measures the transceiver output power, while the right one reads the amplifier output power. To the right of that is a USL CM-8E cinema booth monitor. The center channel of the CM-8E is bridged across the balanced audio line between the SEA 245 and its control head. It's used as a headphone amplifier since the SEA 245 does not have a headphone jack. In addition, the equalizer in the CM-8E is set to a narrow bandpass to act as a CW filter. On the desktop surface, starting on the left is the Chromebook laptop. To the right of the laptop is a Flesher TU-170 Teletype terminal unit with a Wave 2 handheld digital scope as an XY tuning indicator. To the right of the TU-170 is the control head for the SEA 245 HF transceiver. Below the TU-170 and SEA245 is the controller for the MFJ HAM-IV rotator that aims the Cushcraft A3S antenna. To the right (the silver box) is a switch that switches 12 VDC to the MFJ-4712 antenna switch. The bug and key are to the right. The bug is wired in parallel with the key. There are several diodes on the key so the bug and key can drive the code practice oscillator part of the MFJ 557 to provide sidetone, drive the SEA 245 and drive the CW ID input of the TU-170. On the far right is the Teletype model 15.
Dentron Clipperton-L with the cover removed. The power supply is on the left, the output tuning network on the front right, and the four 572B triodes on the right rear.
Here's a view of the SEA 245 control head. It has an RS-485 bus (called SEABUSS) that carries control information between the control head and the trnsceiver. It can also communicate with the SEA 1630 tuner, but I currently have the tuner operating stand alone. Instead of being on SEABUSS, the tuner (of course) gets the RF and PTT. It returns an open collector signal that goes low when the tuner has tuned. When transmitting, the SQL indicator (squelch) is replaced with TND indicating the tuner has tuned the antenna. Besides SEABUSS, the control head connects to the SEA 245 transceiver with a balanced audio line, the PTT line, a power on/off control (switch to ground to turn on the radio), and switched +12V. The balanced audio line is run as an analog tristate bus. When receiving, the transceiver puts audio on the bus. When transmitting, the control head puts audio on the bus. On a ship, there are typically multiple control heads connected to a single transceiver using SEABUSS.

On the right is an MFJ-557 code practice oscillator. The straight key keys both the code practice oscillator and the SEA 245 transceiver. The code practice oscillator provides "side tone." You may see a few diodes on the left side of the straight key. They provide isolation between the code practice oscillator, the TU-170 CW ID input, and the SEA 245 transceiver.

To the left of the MFJ-557 is a Vibroplex Blue Racer Deluxe. This is serial number 229386 originally owned by my father, K. E. Hallikainen (Hal). This list puts the manufacture date as 1962, which seems a bit late. Note the Round Arm Vari-Speed Accessory added to the bug. This slows it down to about 13 WPM. The bug is connected in parallel with the straight key so it also keys the code practice oscillator, the SEA 245 transceiver, and the CW ID input of the TU=170.

This is the actual SEA 245 transceiver (bottom right black box with blue Power Pole connectors). Above the SEA 245 is the SEA 1630 antenna tuner (see below for more details). To the left of the SEA 245 is the Astron SS-50M 12V, 50A power supply to power the SEA 245. Just to the right, but not shown, is a APX SUA2200 UPS that can run the station (without the Clipperton L) for an hour or two. The UPS weighs 139 pounds!

The Work Bench

Here's a veiw of the work bench. Test equipment includes a Belar FMM-2 modulation monitor. On top of that is homebrew frequency converter that converts several frequencies to the 650 kHz IF input frequency. Other equipment shown includes an audio voltmeter, oscilloscope, audio generator, distortion analyzer, and a small USB logic analyzer. There's a desktop Windows computer shown running a G4L backup. The large microphone is used for web conferences. The PTT switch on it enables the microphone and mutes the speakers making conference calls pretty easy. To the left of the computer is a CZUR book scanner I use mostly to scan broadcast equipment manuals (see http://bh.hallikainen.org ). It's a pretty amazing scanner. It takes a high resolution photograph of a pair of pages of an open book and generates PDF with background OCR. While photographing the book, it puts a few lines across the book with a red laser. It then adjusts the image to make these lines straight, flattening out the curve of the pages as they approach the binding.

Antenna Tuner

Here's a view of the Seacom SEA 1630 antenna tuner with the cover removed. It is designed to drive a wire antenna on a ship, so there is a ceramic insulator on the top to connect the wire to. Here, the tuner is driving coax (to the balun driving the inverted V). Therefore, an SO-239 was added to the side of the tuner. AWG #6 wire connects the SO-239 to the antenna tuner output at the ceramic insulator and to the ground plate in the tuner. The tuner is a pi network with capacitors to ground at the input and ouput and an inductor between the input and output. Both the inductor and capacitors consist of several binary weighted inductors or capacitors. Relays short out the inductor sections when they are not needed. Relays also ground the low side of the input and output capacitors as required. The microcontroller (in the metal box) drives the relays as appropriate to put the minimum SWR on the input. Also visible on the bottom right of the tuner is a "doorbell button." This allows the transmitter to be keyed at the tuner for checking its operation. This photo shows the tuner when it was outside As noted in the block diagram above, the tuner is now in the shack, immediately above the transceiver. It is electrically between the SEA245 and the Dentron Clipperton-L. When the amplifier is not in use, its internal bypass relay (also used in receive) connects the input to the output. The SEA 1630 then matches the antenna, as seen at this end of the transmission line, to the transceiver. When the Dentron Clipperton-L is in use, the SEA 1630 matches the transceiver to the untuned input of the Dentron Clipperton-L.

Power Line Noise

My adventures with power line noise. Xcel Energy did a lot of work to solve it. Now I see some noise the day after a rain storm, but generally noise is not synchronized with the line. I look forward to a power outage go see how much noise goes away. There seems to still be quite a bit of noise, but it is not synchronized with the power line. It could be switching power supplies in the neighborhood or may just be th way the HF fands are. I can drop AC power to the QTH and the noise level remains the same, so it appears to be from outside.

Ham Radio Resources

Ham radio resources will be collected here.

Interesting Stuff

Here's a short list of interesting radio stuff.
Broadcast History - My own online collection of broadcast equipment manuals along with LOTS of other interesting links.
California Histrical Radio Society - A great group of people collecting old broadcast equipment and history. They publish an excellent magazine that has included stuff like restoration of a mechanical television and other wonderful articles. The museum is in a 1900 telephone exchange building in Alameda CA.
Restoring a Teletype model 19 - Great series of videos on restoring a Model 19. Includes a visit to Mr. RTTY, the ultimate Teletype parts supplier.
Maritime Radio Historical Society - An operating Morse radiotelegraph shore station. The transmit site is in Bolinas CA, and the receive site and control point is in Pt. Reyes Station CA. Here are some photos from our visit in 2015. This is a wonderful project!
Remote Ham Radio - Can't put up a 200 foot tower with a four element 40 meter Yagi and 1.5 kW amplifier in your backyard? Operate one of these stations from your kitchen table with a web browser. There's an annual membership fee plus a per minute charge for use of the stations. But, this is an interesting way to get on HF from a condo with strict CC&Rs.
Reverse Beacon Network - Software defined radio receivers around the world are continuously monitoring the ham bands. These SDR receivers drive "skimmer" software that decodes CW and various digital modes. Send CQ or TEST DE CALL and see where you are received, the signal to noise ratio, and the speed (such as CW WPM). Another amazing intersection of ham radio and the Internet.
Web SDR - Software defined radio receivers around the world. In simplified form, these receivers connect an antenna to an analog to digital converter which drives an Ethernet interface (with an FPGA between) which drives a server. All tuning, filtering, and demodulation happens in the server. Multiple users use a web interface to receive the frequency of interest to that user. Each user operates their SDR software independently. It's a great way to hear what your transmitter sounds like. The web sdr can record the audio and send you the audio file. Key clicks, chirp, good speech quality? Web SDR lets you know.
Kiwi SDR - Another software defined radio running on very limited hardware. It supports 4 users and includes decoders for CW, RTTY, FAX, Loran C, Navtex, and more (see the list under Extension)
Jean Shepherd was an announcer on WOR and wrote and narrated the movie "A Christmas Story." He talked about ham radio several times on WOR. Jean Shepherd audio clips
Contra Dance - Great Fun!

Comments?

I look forward to your comments! Write me at harold@w6iwi.org.