6

It's all of the above: an RF ground a 12 V power ground a lightning ground, for what it's worth a chassis ground to prevent "buzz" on the chassis if your shack 0V is not earthed The manual says to connect it to a ground rod, to prevent TVI, BCI. If you used an end-fed antenna without a ground or counterpoise, the mains wiring (through your power supply) ...


3

A spliced joint makes very little difference to an HF antenna electrically, but if you do solder it then you should protect the solder joint from the weather, because the solder will corrode faster than the wire. Right-angle turns in the wire will affect the radiation pattern, but since the radiation pattern of a "random" length wire antenna is funny-...


2

It's merely a bolt through the case. Under normal operation it shouldn't carry any current, so insofar as grounds come in neatly categorized "kinds", I'd say it's for safety. It is not part of the RF system, or shouldn't be under normal circumstances. If the feedline currents aren't balanced, then this ground connection would be one possible path for those ...


2

I think it's highly doubtful you could break anything by turning those knobs. At worst, you just end up with horrible clipping and distortion as you experienced. The IC-7300 is a direct-sampling SDR. It's possible you found some software bug. Or it could just be that the AGC wasn't on long enough to adjust the gain back down. Complicating matters is that ...


2

Ham radio is about experimenting, Wire antennas are relatively cheap to make. Go ahead and try it and see how well it works. I am not sating you should not read about various antennas and ask other people's opinions. You should, but at the end of day go ahead and try it. In my experience splicing wires should not be an issue. mechanically fasten the wire ...


2

Splicing the wire is just fine electrically, but if you're using multistranded cable you probably won't want to solder it. Soldering makes a stiff section which concentrates the stress at the joint, leading to premature failure. Swaging is ideal, but if you don't have the necessary tool then rope clips are an acceptable alternative.


2

If it is convenient to reduce the swr by fixing the antenna, that would be a more effective solution. But, as you say, 1.5 is not that bad, and likely you would like to continue using the antenna in the phone region anyway. So is it better to run it at 1.5 or engage the tuner? It is probably easier on the radio to use the tuner. The disadvantage of the ...


2

Short version of the answer: VFO B was USB, not USB-D. After manually changing VFO B to USB-D it worked. Longer version: I went back to testing this again and finally noticed that the mode indicator was changing from USB-D to USB every time the WSJT-X keyed up the radio. Apparently telling WSJT-X to use data mode only ensures the radio is using data mode ...


1

If you do not use the tuner, you are getting some power (another answer here says around 4%) reflected back into the final stage of the power amplifier (PA) of the radio. This will cause the final transistor(s) to heat up, and the cooling fan will be used to remove the heat. If you do use the tuner, you move the mismatch from the PA to the tuner circuitry, ...


1

For transmit, compared to a perfect SWR of 1:1, an SWR of 1.5:1 will give about 4 % loss of power radiated by the antenna due to reflections at the antenna / feed line junction. All other things equal, this will result in about 0.2 dB drop in signal strength for a remote station receiving your transmissions. Similarly, for your receive , compared to a ...


1

Yes, you can. If you want it to stand up physically for a long time, you should Make a good, strong splice. To make a "lineman splice" you strip several inches of each wire, overlap them, and closely wrap each one around the other one, as in this diagram (A through D are the four steps of one variation; E and F are other variations with slightly wider ...


1

It is primarily an RF ground. Connecting that to an earth ground can invite damage from a lightning strike. See http://w8ji.com/station_ground.htm. I used to have lots of annoying audio and CW feed back through my speakers, headphones, computers, etc. My voice and CW came through all of that whenever I transmitted. But when I bonded my tuners, amplifiers, ...


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