211
VHF/UHF Logs, including satellites and radiosondes / Re: Starlink Beacons
« on: December 10, 2021, 1749 UTC »
That's some dx that's outta this world!
Shortwave Pirate Radio In North America And Around The World, And Other Signals That Go Bump In The Night
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same as above ongoing @ 1729Z 10DEC21
Regarding zaps someone I know runs a lot of bevs and he regularly replaces terminating resistors, I suggested bypass them with a gas discharge or neon bulb and using higher wattage resistors and see how it fares. That reduced the replacements but for the closest and strongest of zaps.
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212
MW Loggings / Re: KAAY (Little Rock) 1090 AM 0003 UTC 24 NOV 2021
« on: December 10, 2021, 1748 UTC »
KAAY used to come in in the Omaha area nightly with almost local strength, moving to Indiana made it much harder to catch. I wondered why the change in sig strength was so drastic, then noted this;
https://www.rfcafe.com/references/electrical/images2/fcc-ground-conductivity-map-1975.gif
Went from 30 to 8 and it shows.
https://www.rfcafe.com/references/electrical/images2/fcc-ground-conductivity-map-1975.gif
Went from 30 to 8 and it shows.
213
Utility / Re: CIS Navy on HF
« on: December 10, 2021, 1730 UTC »12464 1733Z 30AUG21
Lots of weak/unreadable cw for a time, then settles into a 4 second dash every 25 secs till los an hour or more later, think last time this dash every 25 secs took place they were testing a missile so mebbe another test launch.
same as above ongoing @ 1729Z 10DEC21
214
Amateur Radio / Re: Xiegu G90
« on: November 30, 2021, 0041 UTC »
On cw decode I find 300hz filter and set to 20wpm and it takes right off on a decent sig, does pretty well for a dsp decoder. Also for some reason decoder dislikes changing the cw sidetone from 800, I like 600 but decode was greatly hindered at that freq, wonder if the cw decoder doesn't track offset changes?
A few things would really be nice to have;
one is decimation levels - this will increase dynamic range at the expense of displayed spectrum and 48khz on such a tinys creen is nuts
another is if they made a user sdk for the firmware where one could roll their own gui, psk and fsk modes built in, etc etc
A few things would really be nice to have;
one is decimation levels - this will increase dynamic range at the expense of displayed spectrum and 48khz on such a tinys creen is nuts
another is if they made a user sdk for the firmware where one could roll their own gui, psk and fsk modes built in, etc etc
215
SDR - Software Defined Radio / Re: SDRplay RSP2 software (Non SDRuno)
« on: November 30, 2021, 0030 UTC »
My gotos for rsp are hdsdr and console, with console winning due to stability and vrx.
216
HF Mystery Signals / Re: All 1 PPS pip / pulse / tick logs here please
« on: November 30, 2021, 0027 UTC »
Wcode chu mode (inverted) said this;
Year: 2021, TAI-UTC: 37s, DUT1: -0.1s, no Leap Second, DSTpatCode: 7
Day: 330, Hour: 2, Minute: 31, Second: 33
Day: 330, Hour: 2, Minute: 31, Second: 34
Day: 330, Hour: 2, Minute: 31, Second: 35
Day: 330, Hour: 2, Minute: 31, Second: 36
Day: 330, Hour: 2, Minute: 31, Second: 37
Day: 330, Hour: 2, Minute: 31, Second: 38
Year: 2021, TAI-UTC: 37s, DUT1: -0.1s, no Leap Second, DSTpatCode: 7
Day: 330, Hour: 2, Minute: 31, Second: 33
Day: 330, Hour: 2, Minute: 31, Second: 34
Day: 330, Hour: 2, Minute: 31, Second: 35
Day: 330, Hour: 2, Minute: 31, Second: 36
Day: 330, Hour: 2, Minute: 31, Second: 37
Day: 330, Hour: 2, Minute: 31, Second: 38
217
Amateur Radio / Re: Xiegu G90
« on: November 26, 2021, 0019 UTC »
Some notes on my experience with the 90;
Put ferrites on everything, mic, any cable that goes into the rig, and put some on the coax. The power cable is very prone to picking up rf so ferrite it and some twist the wires to reduce rfi further.
Powering the rig on with certain input cables connected such as the cat control port can cause firmware corruption.
Some find simply swapping ends of the mic cable reduces or eliminates intermittent opens at the mic cable connector in the rig, also some have replaced the mic cable with a cat cable.
Careful selection of firmware and adjustment of controls can make for a very reliable and effective rig.
I find a noise blanker setting of 5 and a width of 10 reduces most random hf pops and crashes without impacting dynamic range much if at all. Unlike stated at this review you can adjust the nb and it is effective;
https://radio.thulesius.se/sdr/xiegu-g90-transceiver/
Shutting off the display by quick press of the power switch reduces the ma used a bit and saves the display backlight, mine's set to a very low backlight setting and find it perfectly usable even in brightly lit indoors.
Join the xiegu g90 groups,io for a lot of info and files;
https://xiegug90.groups.io/g/main
When I was first looking for something portable with low current draw, excellent rx performance, and sdr capabilities along with effective tx power, a mini Icom Pro3 is what I imagined. Well that was a tough order till the 90 came along, and as luck would have it, sherweng rates it above the Pro3;
http://www.sherweng.com/table.html
A linear 10a psu is perfect for the 90, ample current and no rfi as in the case of a switcher psu.
I found a deal at qth for a complete kit, g90, fan/mount, and the hockey puck interface for less than a new one and it was all only a few months old.
https://swap.qth.com/
Put ferrites on everything, mic, any cable that goes into the rig, and put some on the coax. The power cable is very prone to picking up rf so ferrite it and some twist the wires to reduce rfi further.
Powering the rig on with certain input cables connected such as the cat control port can cause firmware corruption.
Some find simply swapping ends of the mic cable reduces or eliminates intermittent opens at the mic cable connector in the rig, also some have replaced the mic cable with a cat cable.
Careful selection of firmware and adjustment of controls can make for a very reliable and effective rig.
I find a noise blanker setting of 5 and a width of 10 reduces most random hf pops and crashes without impacting dynamic range much if at all. Unlike stated at this review you can adjust the nb and it is effective;
https://radio.thulesius.se/sdr/xiegu-g90-transceiver/
Shutting off the display by quick press of the power switch reduces the ma used a bit and saves the display backlight, mine's set to a very low backlight setting and find it perfectly usable even in brightly lit indoors.
Join the xiegu g90 groups,io for a lot of info and files;
https://xiegug90.groups.io/g/main
When I was first looking for something portable with low current draw, excellent rx performance, and sdr capabilities along with effective tx power, a mini Icom Pro3 is what I imagined. Well that was a tough order till the 90 came along, and as luck would have it, sherweng rates it above the Pro3;
http://www.sherweng.com/table.html
A linear 10a psu is perfect for the 90, ample current and no rfi as in the case of a switcher psu.
I found a deal at qth for a complete kit, g90, fan/mount, and the hockey puck interface for less than a new one and it was all only a few months old.
https://swap.qth.com/
218
Equipment / Re: The Beverage Antenna, 100 Years Later
« on: November 25, 2021, 2341 UTC »Hey All
I've read a good bit about Harold Beverage,a fascinating man.
FWIW, Many years ago I laid 2000 ft of single conductor field telephone wire from tree to tree down to the swamp where I could vary the resistance feeding the gnd rod.
I fooled around by sending audio from the receiver down the antenna via a cheap 49 Mhz transmitter loosely coupled to the antenna . It allowed me to make some seeming "adjustments" by placing my hand held scanner near the wire and varying the resistance in the swamp.
I was pretty green re radio knowledge then . In retrospect not really definitive as to what was actually going on re "adjustments " , but fun to play with . One heck of an antenna and no problems despite being line of sight to monster WRKO at one mile. Lots of LW b'casts and sferic fun .
Once I inadvertently got a good zap by induced lightning current from a storm around 4 miles ( moving away). Stupid. Dangerous. Interesting.
Ah , youth.
K
Regarding zaps someone I know runs a lot of bevs and he regularly replaces terminating resistors, I suggested bypass them with a gas discharge or neon bulb and using higher wattage resistors and see how it fares. That reduced the replacements but for the closest and strongest of zaps.
219
European Pirates and Private Stations / Re: UNID 6925 AM 2158 UTC 25 NOV 2021
« on: November 25, 2021, 2316 UTC »
-95dBm carrier @2315Z but no mod.
220
Huh? / Re: Jessica Rosenworcel nominated to become 1st woman to lead FCC?
« on: November 01, 2021, 2137 UTC »
""Every issue is a gender issue, even broadband access," Rosenworcel wrote in a July op-ed she co-authored with Valerie Jarrett, a former senior adviser to President Barack Obama."
221
General Radio Discussion / Re: Klingenfuss frequencies
« on: November 01, 2021, 2134 UTC »
These guys are known to log a few pertinent freqs;
http://www.udxf.nl/ute-info.html
http://www.udxf.nl/ute-info.html
222
SDR - Software Defined Radio / Re: Waterfall images
« on: October 28, 2021, 0041 UTC »
Another neat trick is to record some ota music and play it back ota from the image. Just for proof of concept of course.
223
SDR - Software Defined Radio / Re: SDR issue with new antenna (RSP2)
« on: October 28, 2021, 0039 UTC »
On the bigger antenna, might have to reduce gain in the sdr to make sure you don't max out the adc. With so much surplus gain designed in most in modern sdr you can stand to add some decimation as well as gain reduction, both will increase dynamic range.
224
HF Mystery Signals / Re: UNID WF SIG 6.955 0155 UTC 1 October 2021
« on: October 28, 2021, 0024 UTC »
Yep, or someone retransmitting HAARP audio. Wonder what heater was in operation.
225
VHF/UHF Logs, including satellites and radiosondes / Re: VHF/UHF general listening antenna
« on: October 28, 2021, 0016 UTC »
No gain on a discone compared to a 2m/70cm vertical, unless the disconey was huge.
Consider a discone to be a dummy load for rxing, incredibly broadbanded but no gain, some use a amp to help it along.
I think the main diffs between the various brands of discone revolve around construction materials and methods and wether it has a stinger or not. A stinger can help in lower band performance such as for cb or 6m use, some guys put a short dual band element in place of the cb/6m stinger to get some gain there.
Consider a discone to be a dummy load for rxing, incredibly broadbanded but no gain, some use a amp to help it along.
I think the main diffs between the various brands of discone revolve around construction materials and methods and wether it has a stinger or not. A stinger can help in lower band performance such as for cb or 6m use, some guys put a short dual band element in place of the cb/6m stinger to get some gain there.
