Hi John and others.

With regard to my inquiry about potential external antenna coupling problems
with hand helds. John, you say that:

> > They don't tune the radio to the antenna, it's the antenna to the radio.

This is normally true, of course, with just about every commercially-built
tranceiver I know. It does not remove the problem to which I referred
earlier, however, that is, what the impedance and characteristics of the
rubber duck, supplied with a particular rig are. Moving from a sma-type
connector to a bnc connector, for example, does not necessarily improve
what, optimally, the output circuits of the handheld want to see. It seems
to me that Kenwood might have made reference to external antennas, had they
considered them appropriate.

By the way, John, it may well be that, in the case of multi-band handhelds
like the t h f 6 a, the radio is, in fact, directed by the micro processor
to change output configurations as one changes bands. I would assume this to
be since I doubt the rubber duck contains traps or special coils that would
allow it to function as conventional trapped antennas for hf do.

All speculation on my part, though. What I want to avoid are serious
mismatches between the rf output circuits of the handheld and antennas,
commercial or home brew, that may be inappropriate. Again, if anyone has
particulars that pertain to this problem, especially for the t h f 6 a which
I just bought, I would be very grateful to hear them.

Thanks much.

Jerry, v e 3 q s o

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