NJDTechnologies

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

Current Operating Frequency and Mode

OFF AIR but QRV after dark tonigth

SCHEDULED ACTIVITY: CQ 474.5 kHz CW by 1015z through sunrise most days, WX permitting

Good propagation and improving band conditions as geomagnetic field is quiet through the session

– Posted in: 630 Meter Daily Reports, 630 Meters

The band returned to relative normal for a mid-August session.  Noise was manageable for most judging by reports and a number of longer haul paths opened by morning.  WSPRnet has functioning again although appears to be running very slowly.  There was no word about the cause of the outage from the previous session.

Geomagnetic activity was quiet and the Bz is pointing to the North.  Solar wind velocities have returned to low levels, averaging 310 km/s.  DST values are generally nominal.   Solarham indicates that a G1 storm is due within the next 24 hours:

planetary-k-index 081516

 

Kyoto DST 081516

 

Australia 081516

 

The WSPR decode count for my station were above average compared to recent sessions when one factors in the three hour beak I took overnight due to local poor weather conditions.  I called CQ on JT9 for a bit around 0400z but it was noisy and impromptu and I didn’t have high expectations.  The West coast was just at sunset so it was a bit early for those guys.  Shortly after 1000z I transitioned to JT9 and called CQ for about twenty minutes and while I didn’t receive any calls, Ken, W8RUT / WI2XFI, received my CQ’s and provided the following comments and screen capture:

“Just to let you know I did spot your JT9 signal this morning (see screen print) using my back porch e-probe test station. I have 4 different e-probes I have been comparing. The band has a bit of QRN this am but I was able to get three spots.

I will make a point to try and answer you in the coming days. Thanks for letting me know in your daily reports that you would be on..
73, Ken-W8RUT/WI2XFI”
WG2XIQ WI2XFI 081516

JT9 console of WI2XFI showing reports for WG2XIQ

 

I decided to transition to 160-meters for a few minutes and make  few calls but the band wasn’t as good as it was on the previous day based on what I was hearing and what Reverse Beacon Network was reporting.  It may have been as simple as all of the trees being waterlogged and subsequently increasing attenuation.

I transitioned to 474.5 kHz and called CQ on CW for a bit as I tested some changes with how I key my amplifiers and QRTed around 1130z.  It was a lot of fun to sit in the captain’s chair and be an active participant.

Ken, K5DNL / WG2XXM, reports that he decoded four WSPR stations including WH2XCR three times, best at -23 dB S/N.  Ken was decoded by 25 unique stations including five Canadian stations and ZF1EJ.

Larry, W7IUV / WH2XGP, reports high noise in Washington state.  He decoded five WSPR stations and was decoded by eleven unique stations.  He reports that he operated with reduced power through the session and also noted that the most recent WSJT-x installer has a problem for XP users that will be corrected in future releases.

Phil, VE3CIQ, provided the following comments and statistics:

“On the e-probe- Very low noise after the storm, 2” rain finally. Started decoding XXM an hour after sundown. My transmit range is starting to pick up- VE4 land

Spot counts seems low, and WSPR was really slow last night, possibly missing a lot of spots?”
VE3CIQ 081516

VE3CIQ session WSPR activity

 

Neil, W0YSE/7 / WG2XSV, provided the following comprehensive report of activity at his station:

WG2XSV 081516

Rick, W7RNB / WI2XJQ, reports that the thermal problem with his PA is resolved.  Below are details and pictures of his very attractive four-port combined amplifier system based on the stock GW3UEP design:

“Hi John — At your suggestion, and that of Larry W7IUV I isolated my FETS with individual heat sinks and use fans for additional cooling. The FETS are mounted directly to the heat sink for maximum heat transfer.

This is a new amplifier

28Vdc 21 Amps input
500 watts output
85% efficiency
2.42 amps of antenna current
7.89 watts ERP

12.98 watts EIRP

I am using 4x IRF740’s each in the GW3UEP configuration with a 4 port Wilkenson power combiner. This is all done with “dead bug” construction.”
WI2XJQ four PA 081516

Four independent FET Amplifiers in a very well organized and attractive enclosure

 

WI2XJQ four PA cooling 081516

Cooling system for FET amplifiers

 

WI2XJQ four port wilkinson 081516

Four-port Wilkinson combiner!

 

That’s really a fantastic job that Rick has done with his system!  He also submitted a report and comments for the session:

“Hi John — Back on the air having solved the heating issue Pictures to follow.  I had a grand time last evening conditions were good and enjoyed watching the SNR’s change as it got later in the evening.”

WI2XJQ 081516b

Unique stations that Rick decoded

WI2XJQ 081516a

Unique stations that decoded Rick

 

Regional and continental WSPR breakdowns follow:

NA 081516

North American 24-hour WSPR activity

 

EU 081516

European 24-hour WSPR activity

 

VK 081516

Australian 24-hour WSPR activity

 

JA 081516

Japanese 24-hour WSPR activity

 

There were no reports from the trans-Atlantic, trans-African, or trans-Equatorial paths.  UA0SNV was present but no reports have been filed at this time.

In the Caribbean, Eden, ZF1EJ, reported WG2XXM and WG2XIQ:

ZF1EJ 081516

ZF1EJ 24-hour WSPR activity

 

Laurence, KL7L / WE2XPQ / WI2XBA/5, continues to perform antenna comparison experiments at his station and sent a note and picture of the L400B.  What a view!

“Ill run this tonight and compare with the avg. better s/n probe in previous worst direct – its at 5.5m now – im pushing it at this height mechanically a bit so may drop. 1m grp poles…”

KL7L probe 081516

Waterside probe at KL7L

 

Laurence reports that he operated a single receiver and receiver overnight with the probe and decoded WH2XGP at CW levels.  He also decoded WG2XXM  as well as WH2XCR in addition to others in the Pacific Northwest:

WE2XPQ 081516

WE2XPQ 24-hour WSPR activity

 

WG2XXM WE2XPQ 081516

WG2XXM, as reported by WE2XPQ

 

WH2XCR WE2XPQ 081516

WH2XCR, as reported by WE2XPQ

 

Merv, K9FD/KH6 / WH2XCR, was heard further to the East during this session, more so than has been observed in months.  The path to Australia continues to be open.  Merv continues to operate with his receive antenna (80-meter dipole) on the ground until repairs can be completed and its having an obvious impact:

WH2XCR 081516

WH2XCR 24-hour WSPR activity

 

WH2XCr VE4XC 081516

WH2XCR, as reported by VE4XC

 

WH2XCr WG2XXM 081516

WH2XCR, as reported by WG2XXM

 

WH2XCr VK2DDI 081516

WH2XCR, as reported by VK2DDI

 

WH2XCr VK2XGJ 081516

WH2XCR, as reported by VK2XGJ

 

WH2XCr VK3ELV 081516

WH2XCR, as reported by VK3ELV

 

WH2XCr VK4YB 081516

WH2XCR, as reported by VK4YB

 

Jim, W5EST, presents a list of low frequency resources for the coming season:

“HELPFUL WEB SITES FOR LF/MF EXPERIMENTERS AS SEASON BEGINS

630/2200 meter bands confront us with many mysteries.  But it’s no mystery that lightning static from storms in any direction within about ~1000 km of the RX station may reduce weak signal distance reception.  Scope these 24-hour up-to-the-hour lightning movies:

http://wwlln.net/WWLLN_movies/Movie_of_Lightning_in_Pacific_BIG.gif

http://wwlln.net/WWLLN_movies/Movie_of_Lightning_in_Americas_BIG.gif

http://wwlln.net/WWLLN_movies/Movie_of_Lightning_in_EurAfrica_BIG.gif

Real time lightning: Try correlate it with MF/LF static:

http://www.lightningmaps.org/realtime?lang=en

http://www.blitzortung.org/Webpages/index.php?lang=en&page_0=30

http://afsmaps.blm.gov/imf_lightning/imf.jsp?site=lightning Alaska lightning map

Local rain and snow may increase the noise level without a lightning accompaniment. USA national Doppler radar helps you identify storm distributions:

http://radar.weather.gov/ridge/Conus/

http://www.bom.gov.au/products/IDR71I.loop.shtml  Australia: Sydney Doppler radar.

Knowing when sunrise SR and sunset SS happen at each end of a path can tell us intervals of common darkness for time opportunity windows of path reception. http://www.timeanddate.com/astronomy/usa .  A world time map converts local time to UTC. http://www.worldtimezone.com/   A grayline map seasonally shows which end of a nearly N/S path gets SR or SS transition first. http://dx.qsl.net/propagation/greyline.html

The ionosphere is continually changing during the days and nights:

http://www.spacew.com/www/foe.html   E-region critical freq contours globally.

http://www.spacew.com/www/fof2.html  F2 critical freq contours globally.

SDR web sites can help you monitor 630m/2200m traces in EU, N. America, VK/ZL, etc:

http://websdr.ewi.utwente.nl:8901/  This Netherlands web SDR looks promising, but says Java not working with it on my own computer.

Do e-mail us links to convenient SDR web sites for monitoring 630m/2200m in EU, N.America, VK or other regions that are supported with adequate antennas to be seriously useful for these bands.

Space weather and geomagnetic field maps offer tantalizing 630m propagation clues:

http://solarham.net/  Click each visual for more.  Kp, Ap, Bz, CME, solar wind, Au, etc. http://www.swpc.noaa.gov/products/station-k-and-indices K and Ap GMF indices.

http://wdc.kugi.kyoto-u.ac.jp/dst_realtime/201511/index.html Kyoto Dst real-time.

http://www.tesis.lebedev.ru/en/sun_flares.html?m=8&d=14&y=2016 Solar flares C, M, X.

Do you frequently use still other web sites to ponder or predict LF/MF propagation and reception? Please offer any such links for posting to this blog!”

 

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