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Re: uBitx Antenna #ubitx-help

 

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If I may add to the conversation - my experience of using CB meters is if they're the parallel-strip kind (very common), they may loose some sensitivity at the low end.? Otherwise, they did a fair to good job checking the SWR, which is a ratio anyway.? (At the upper end of the 'usual' spectrum - sometimes TOO sensitive, but I've used them with reasonable accuracy on 6m.)

Power measurements are a different story... but in those cases, I'd rather use something more accurate.? The way many of them are made, they are still accurate for measuring power between 15m and 10m only (my experience is that they're usually rather accurate at the upper end of the HF spectrum if they're made for 11m).



On 09/09/2018 12:51 PM, Arv Evans wrote:

Output of the uBITX is 50 ohms.? Your CB SWR meter should work for the upper end of?
HF range (20M through 10M) and maybe acceptably good for 80M through 10M.? Many?
of those old CB SWR meters were just copies of ham radio SWR meters of the era.??

If the CB SWR meter is not performing well, it does provide a case, meter, and knob to?
use in building a more modern bridge type SWR and power meter.

Arv
_._

On Sun, Sep 9, 2018 at 1:12 AM, <gonewiththeego@...> wrote:
Thank you very much for your nice "Welcome aboard", indeed I appreciate all of the answers above and I'm pretty sure that this topic will have some "echo" throughout community. These are maybe the most common questions asked by those with just the license of operation in hand and a few basic knowledge of electronics. I can't wait to see the uBitx on my desk. Meanwhile, I can't find some genuine information about the output impedance of the uBitx itself. Is it 50 ohms ? Gordon Gibby previously sugested that a CB SWR-Meter will do the job on HF also. I found one but it's rated to 11m band only, or at least that's what on the label. Can someone tell me what can go wrong it I start using it ? And by experiment, does anyone know how much SWR can uBitx handle without permanent damage?


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