NJDTechnologies

Radio: it's not just a hobby, it's a way of life

Current Operating Frequency and Mode

QRT but I'll be back tonight, WX permitting

SCHEDULED ACTIVITY: CQ 474.5 kHz CW by 1000z through sunrise most days, WX permitting

Trans-Atlantic reports for WG2XKA and first time DX reports for VE3EFF; Trans-Pacific path open but down compared to previous session; WH2XGZ CW beacon QRV

– Posted in: 630 Meter Daily Reports, 630 Meters

Propagation was good once again with trans-Atlantic and trans-Pacific reports during the session.  Band conditions were poor, in many areas, due to storms that appeared to be diminishing through the evening but it seems that as one region’s storms disappated, another system became very active.  In short it was noise after dark last night and this morning in many parts of North America.

lightning-091316

11-hour North American lightning summary

 

Geomagnetic conditions were quiet but more active than the previous session.  The Bz is pointing to the South although solar wind velocities remain at very low levels near 285 km/s.

planetary-k-index-091316

 

kyoto-091316

 

australia-091316

 

The trans-Atlantic path was open to DL4RAJ for WG2XKA and VE3EFF.  This was VE3EFF’s first trans-Atlantic report.  He is remarkably using a full quarter-wave length of wire oriented as a 10-meter tall inverted-L and using under 50-watts TPO (thanks to Phil, VE3CIQ for those details.)

ve3eff-dl4raj-091316

VE3EFF, as reported by DL4RAJ

 

John, WA3ETD / WG2XKA, adds about his session:

“True clear and colder fall conditions resulted in a strong overnight session in the northeast.  The PNW stayed open for the second consecutive evening with both-way spots from VE7SL and WH2XGP.  Two spots were received froim DL4RAJ, the best being -18 at 0420z.  Nine were heard and 18 spotted by WG2XKA.”

wg2xka-091316

WG2XKA session WSPR activity

 

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WG2XKA, as reported by DL4RAJ

 

In the West, the Pacific path opened this morning but not necessarily as good as it has in the previous session.  Roger, VK4YB, reported a “code-4” with a few weak reports not really conducive for a JT9 QSO.  He and Steve, VE7SL, opted to not make an attempt for a JT9 QSO today.

Ward, K7PO / WH2XXP, reports that he was decoded by 39 unique stations including VK5ABN, VK2XGJ, and VK4YB, who decoded Ward after sunrise in Arizona.

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WH2XXP session WSPR activity (courtesy NI7J)

 

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WH2XXP, as reported by VK5ABN

 

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WH2XXP, as reported by VK2XGJ

 

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WH2XXP, as reported by VK4YB

 

Larry, W7IUV / WH2XGP, was decoded by VK4YB (Note:  Much of the detail data for Larry is currently missing due to a WSPRnet outage):

wh2xgp-vk4yb-091316

WH2XGP, as reported by VK4YB

 

Ken, K5DNL / WG2XXM, reports that he decoded five WSPR stations and was decoded by 38 unique stations including VK4YB:

wg2xxm-vk4yb-091316

WG2XXM, as reported by VK4YB

 

Glen, K5FX / WH2XGZ, operated a CW beacon on 475.5 kHz through the evening.  I noticed the signal moments before leaving the shack for a bit when he was prominently displayed on the WSJTx waterfall.  This was early evening and he was very audible.  I wish I had made a recording right then because an hour later the noise was sufficiently high that I could neither hear him nor see him well on the waterfall.  He was, however, heard here, 180-miles to the North.

Neil, W0YSE/7 / WG2XSV, submitted these details and statistics for the session:

wg2xsv-091316

Doug, K4LY / WH2XZO, posted on the ON4KST chat/logger, “GM heard 6 and heard by16 here. Am wowed by VE3EFF’s first? TA. What TX antenna is he using?”

Rick, W7RNB / WI2XJQ, submitted the following receive statistics from his station:

wi2xjq-091316

Initial information about the upcoming Berlin Treaty special event on November 12 can be seen here.

New for this WSPR session was VE3046SWL.  Welcome aboard!

Regional and continental breakdowns follow:

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North American 24-hour WSPR activity

 

eu-091316

European 24-hour WSPR activity

 

as-091316

Asian 24-hour WSPR activity

 

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Australian 24-hour WSPR activity

 

There were no reports from the trans-African path.

Eden, ZF1EJ, returned after he was absent for the previous session due to lightning, decoding four stations located in the southern US on both of his receivers / antennas:

zf1ej-091316

ZF1EJ 24-hour WSPR activity

 

zf1ej1-091316

ZF1EJ/1 24-hour WSPR activity

 

Merv, K9FD/KH6 / WH2XCR, has likely missed a number of reports of his signal due to a WSPRnet problem prior to his sunrise.  Most of the VK reports do not reflect near-sunrise data but unless stations manually upload their data, this is about as complete as I can provide for this morning’s activity.  JA1NQI-2 and numerous North American stations round out the session.  It was much too noisy to hear Merv here overnight.  WH2XGP was, however, heard by Merv’s on ground dipole receive antenna.  John, VK2XGJ, provided a supplemental report, appended below:

wh2xcr-091316

WH2XCR 24-hour WSPR activity

 

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WH2XCR, as reported by JA1NQI-2

 

wh2xcr-vk5abn-091316

WH2XCR, as reported by VK5ABN

 

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WH2XCR, as reported by VK2XGJ

 

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WH2XCR, as reported by VK4YB

 

vk2xgj-091316

VK2XGJ WSPR console supplemental data

 

Jim, W5EST, presents, “SAME-STATION DIVERSITY RX ANTENNAS ON 630M: VE7BDQ JT9 TO WG2XSV”:

“Yesterday’s blog dealt with stereo diversity and earlier blogs discussed JT9 screen-sharing.  Meanwhile, Neil WG2XSV W0YSE  (WA) was testing if diverse antennas at one’s own station can improve JT9 reception at his QTH.  He did a two-night JT9 diversity test of this type Sept. 4-5, and dialogued now.

Neil WG2XSV 9/5: John XIQ, I’ve emailed you a copy of the spots from my reception of John VE7BDQ’s JT9 last night on two different RX setups here. My E-probe is at 20 ft (PA0RDT type) about 25 ft from house.  Vertical is 40 ft of vertical pipe attached to house with 3 sloping 25 ft wires of top loading.  I had my E-probe screen visible all night using Join.me™ for John VE7BDQ to see my decodes of his signal.

John WG2XIQ: …Are you seeing a prop difference on two different antennas or a difference in the sound card on each machine?  Could you rerun the test tonight swapping the PC’s.

Neil WG2XSV: The other machine will be using my Signalink™ USB sound card, which was on the other PC last night.

Neil WG2XSV 9/6: The Vertical antenna fed a Yaesu FT100d into WSJT-X 1.6 (Windows® XP machine). Sound card is stock on Dell GX270 machine.  The E-probe antenna on 9/5 fed a Yaesu FT857d into WSJT-X 1.6 on a Windows 7 machine running Windows Vista™ operating system with Join.me screen-sharing coupled to a SignaLink USB interface: http://www.tigertronics.com/slusbfaq.htm .  WSJT-X 1.6 decoder was used on both machines both nights.

John WG2XIQ: Ok, so I just did some eyeball comparisons of yesterday’s previous numbers to today’s numbers both between the XP machine on different days and each antenna…didn’t see anything that stuck out as being a major variation between sound cards although there likely are small variations that we probably can’t discern from propagation.  Neil, your sound cards are close enough. Thanks for running the test two nights in a row!

Your vertical data was consistent with what I see here. On a quiet night, it’s hard to beat the big aperture of the transmit antenna.  The E-probe seems to have its own quirks and just works better sometimes… I’ve never understood it: Like the time that Merv WH2XCR [Hawaii] and I (XIQ) worked on JT9 and the only antenna I could hear him on was the probe… makes no sense.

Jim W5EST: This TABLE summarizes the  JT9 receptions:

TABLE: VE7BDQ-wg2xsv JT9 RECEPTIONS (Nr decodes, Peak SNR)

DATE     E-PROBE       VERTICAL     E&V   Combined E&V Decodes

9/4/16     24, -16dB           16,  -9dB       15               25  (  89%)

9/5/16     23, -12dB           21,  -6dB       16               28  (100%)

The signal path is 373km, so the 630m RF ray elevation angle may be about 28° for single-hop reflection from an E-region altitude 100 km.

On both 9/4 & 9/5, Vertical SNR exceeded E-probe SNR on every Vertical decode.

However, the Vertical receiving chain simply missed numerous decodes that the E-probe receiving chain captured. The E-probe added 25% or more to the total number of JT9 decodes. VE7BDQ was TXing 6 slots/hr for 4.5 hours inclusive, so 100% reception would give 28 decodes.  “E&V” tells number of JT9 slots that yielded decodes from both antennas at once.

Oddly, Vertical had fewer decodes but higher peak SNR on both nights of the test.  However, percentage reception is what matters to QSO capability of a digimode like JT9, regardless of SNR.  Both nights, the diversity antenna/RX combination as a whole surpassed reception on either antenna alone; and on the second night the enhancement was 22% over the E-probe antenna that otherwise yielded the most decodes (or 28/23 -1 x 100%).

Presumably no bad connections nor intermittent local noise affected Vertical more than E-probe during the 4.5 hours each of the two nights. Possibly a further test could swap the antennas at the radios as well. The actual antenna patterns of Vertical and E-probe may significantly differ as to VE7BDQ 630m multipath phases and amplitudes arising and combining with the 3-dimensional antenna patterns of each antenna in the real environment at WG2XSV.  The reception of VE7BDQ 630m JT9 by WG2XSV 9/4-5 using RX antenna diversity contributes a persuasive numerical demonstration of diversity improvement of JT9 percentage reception on that path, it seems to me.

If our readers have further multiple-antenna experiences and/or data, they are cordially invited to e-mail us for blogging here!”

 

Additions, corrections, clarifications, etc? Send me a message on the Contact page or directly to KB5NJD gmail dot (com).