That should¡¯ve been going from no antenna to your antenna. Didn¡¯t catch that voice recognition error. ?Really important to have some measurement of your background noise. ?
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On Apr 21, 2021, at 21:17, Gordon Gibby via groups.io <docvacuumtubes@...> wrote:
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How much local noise are you experiencing? ?inverters, solar panels, noisemakers, Power line noise?
In the middle of the day when you listen in the lower half of the 20 m band you should hear lots and lots of CW signals, FT8. etc. ? going from new antenna to connecting an antenna should give you an increase of maybe five DB of background galactic noise signal in a quiet part of the band. ??
If you are hearing 20, 30, 40 DB of background noise that might be your issue
If you have some other radio to compare with that would help.
Gordon
On Apr 21, 2021, at 21:07, Scott via groups.io <iamsblack@...> wrote:
?Still having quite a bit of fun building/moving antennas and using the uBITX to learn about propagation.? ??
This has me confused however.? Here's what I believe are the relevant details;
uBITX ver6
1/2 wave dipole.? ?It does need to be lengthened a bit.? It's lowest SWR is currently at 14.360? (1.05:1) and is 1.39:1 at 14.074 MHz (20m FT8)
I got these numbers with a NanoVNA
It takes 2 separate roof climbs to adjust but it's on the list.? I'm in a fairly dense residential area and the antenna is about 30' in the air.
The antenna is 14awg stranded, insulated wire fed with about 30' of RG6.? Yes I know it's 75ohm.?
Now, with me running probably somewhere between 5-10W depending on what you read I would expect to hear a lot more stations than I can reach given a "decent" antenna.? ?Here's two grabs from the same moment on pskreporter, one showing over 200 stations that can hear me and the other showing the 9 stations that I can hear.
This doesn't make sense to me given my low power.? Am I interpreting the reports incorrectly?? Is it just a "HF thing" ?? ?I have to assume the antenna/cabling and radio tuning is decent to be able to reach out to 200 stations.? Why do I hear so few???I've tried to listen to for the beacon at 14.100 and I've never heard it.? Is??there a chance there's something up with my rig on the RX sensitivity?
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