It was another good session that started before sunset at my stations with KU4XR decoding my WSPR signal first. WD2XSH/15 was strong here and by sunset a significant number of strong reports were already being registered around the country. In a month or so it may be reasonable to call CQ on CW during the transition to darkness and find stations that are workable. I am hopeful about the coming season. The noise floor was not a problem here, even when listening to the Northwest which was separated from my station by active evening storms in the panhandle of Texas. By morning storms were active in the central US and upper Midwest:
Geomagnetic conditions have returned to mostly quiet levels. The Bz is pointing to the South and solar wind velocities are averaging 475 km/s. DST continues in negative territory but is levelling-off.
Band conditions were good enough for any number of JT9 QSO’s across the country in addition to CW QSO’s with select stations at various times though the session. After a few minutes of calling CQ on CW I got a message from my morning sked partner that he was sleeping in. So instead I called CQ with JT9 and concurrently received WG2XSV’s JT9 beacon. Signal levels were good enough in both directions for an easy QSO. I was also received at W5EST and SWL-EN61 in Indiana. Screen captures follow:
Trans-Pacific activity persists for a number of stations and Roger, VK4YB, posted the following statistics in the ON4KST chat / logger about his activity:
“Spots were 14*WG2XXM (-22) 21*WH2XGP (-18) 31*WH2XXP (-17) 7*VE7SL (-27) 4*WD2XSH/20 (-24) 23*WH2XCR (-13). Decoded by WH2XGP, WD2XSH/20, N6SKM, WI2XBQ, and WH2XCR”
Larry, W7IUV / WH2XGP, reports that he decoded ten WSPR stations during the session, including VK4YB. He used the E-probe until just before sunrise and reports that he did not hear any East coast stations. Larry was decoded by 34 unique stations including ZF1EJ and five VK’s, the furthest and newest report from VK5ABN at a distance of 13575 km.
Ward, K7PO / WH2XXP, received decodes from 46 unique stations including six VK stations. There were late reports from VK4YB at -28 dB S/N, 14 minutes after sunrise at 1324z:
Ken, K5DNL / WG2XXM, reports that he decoded seven WSPR stations and was decoded by 45 unique stations including VK4YB and VK2DDI:
Steve, VE7SL, was “transmit-only” during this session and was decoded by 23 unique stations, including VK4YB:
Rudy, N6LF / WD2XSH/20, shared two-way reports with VK4YB:
Joe, NU6O / WI2XBQ, decoded VK4YB also but was otherwise “receive-only” all night:
N6SKM decoded VK4YB for the second time ever during this session:
Mike, WA3TTS, had a strong session of transcontinental reports into the Pacific. Mike explains:
Rick, W7RNB / WI2XJQ, provided the following statistics from his session:
Neil, W0YSE/7 / WG2XSV, was “receive-only” overnight and provided the following statistics and comments:
KD5DFL in Louisiana was present for the first time during this session and did a nice job decoding a number of stations across North America. Welcome aboard!
Regional and continental WSPR breakdowns follow:
There were no reports from the trans-Atlantic, trans-African, or trans-Equatorial paths.
Eden, ZF1EJ, heard a number of stations, including WH2XGP and WG2XKA:
Laurence, KL7L / WE2XPQ, only had reports for WH2XCR during this session:
Merv, K9FD/KH6 / WH2XCR, had a very strong session after being gone in the previous session. With the receive dipole still on the ground, Merv managed to decode VK4YB, WD2XSH/20, and WH2XXP. WA3TTS decoded Merv for the first time this season and reports into North American and Australia were numerous and strong:
Jim, W5EST, provided this discussion, entitled, “HUNTING FOR TRANSPACIFIC CORRELATIONS BETWEEN BCB AND 630M”:
“Joe NU6O WI2XBQ tells about his ongoing efforts to find correlations between broadcast band DX* stations vis-a-vis 630m DX propagation. DX locations can also find N. America BCB stations from further links.**
Joe WI2XBQ to JH, Sept. 5: You might have seen a discussion I had with Roger VK4YB about using high power broadcast stations as propagation beacons. There is a big 50KW station on 612Khz 4QR in Brisbane about 20 mi. from Roger. Over several nights, when its carrier-to-noise C/N = +30 dB or better, Roger will spot me. There is very high correlation and it’s very predictable. Last night I started receiving carriers from AU / NZ BC stations well before local sunset down there. 4QR on 612 KHz is a clear channel no other high power stations in AU or NZ are on this frequency. 621 KHz is a clear channel in Wellington, NZ. JA freqs are 747 and 774 KHz. Roger spotted XXM about 20 min. before SS. He spotted me about 20 min. after SS.
For several years I have been trying to find a correlation between JA BC station reception and openings into Asia. There is very poor to no correlation even though the stations can be very strong. Two nights ago 774KHz in Akita, Japan, was strong enough to hear the program, but no spots to JA by anyone was reported. This is the usual case.
I should also mention I am using a Mercury SDR*** receiver to hear the BC stations. There is very strong interference from domestic AM stations only a few Khz away, so very good IM performance is required. Also narrow filters to pick out the carriers from the sideband trash.
Hopefully others will be interested and investigate other paths to see if this is a valid method to predict propagation. Joe.
Jim W5EST reply: This BCB DX method complements NDB listening. The carrier of the BCB DX can be powerful enough to disclose an SNR trend on its propagation path across an ocean before any DX decodes on 630m occur. Some BCB DX assignments in east Asia actually coincide with 630m, see a station list.*
The BCB path geometry may be similar enough to 630m path geometry to correlate with 630m nighttime prospects on a given night. To enhance the chances of path similarity, one looks to stations at BCB low frequencies such as 4QR where 612 KHz/475KHz = 1.29 or less than 30% higher frequency.
BCB RF will probably penetrate higher into the E-region than 630m before reflecting, so the BCB path won’t be identical to the 630m path. Even 630m itself may “spotlight” into DX locations and reduce correlations. Also, if BCB RF drills through the E-region and reflects from the F-region while 630m still mostly reflects from E-region, then the propagation paths of BCB vs. 630m will be radically different.
In the end persistence pays off, as Joe has demonstrated at WI2XBQ!
BCB DX by freq. Select world region. Click on a frequency and scroll down to see stations.
http://dxworld.com/cgi-bin/bcbdx.cgi BCB DX station list by frequency.
http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=4&ved=0ahUKEwj9qZ2iuP3OAhUFRyYKHZ4aBQQQFggvMAM&url=http%3A%2F%2Fwww.vk5pas.com%2Fuploads%2F1%2F3%2F9%2F8%2F13982788%2Fadxn554.pdf&usg=AFQjCNHF8Jk-dtQn0EMBBRLR1KTjCawVQw Australia, New Zealand, Oceania. (scroll 80% for BCB).
Additions, corrections, clarifications, etc? Send me a message on the Contact page or directly to KB5NJD gmail dot (com).