[R-390] Antenna Trimmer

[Bob Camp]

Hi

Yes the R-390A does have an antenna trimmer, and no nobody knows what 
it's characteristics are.

I realize that sounds a bit much, but like a lot of stuff on these 
radios it's true. We really do not know what range of impedances the 
little knob will work with. \

What is known is that just about any antenna you hook up can be "peaked 
up" with the antenna trimmer. Like a lot of other things, it works even 
though we aren't quite sure why.

You could do a bunch of math and figure out what's going on, but that's 
better done in the winter when there are fewer other things to do. I 
would bet that the thing will tune out a couple hundred ohms of 
reactance, either inductive or capacitive.

Hopefully that's the information you were looking for. If not just yell 
at me ... everybody else around here does :)

	Take Care!

		Bob Camp
		KB8TQ



On Jul 14, 2004, at 5:45 PM, Charles B wrote:

> Hi again,
>
> I don't have my R-390A yet, but I was wondering about it anyway.  Does 
> the R-390A have an antenna Timmer?  If so, what is it's 
> characteristics?
>
> Thanks
>
> Chuck
>
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