Not to mention the fact that the reason you're adding the adapter is most
likely because you are putting a better antenna on the HT. I doubt what you
*might* lose by moving the feedpoint away from the "counterpoise" is not as
much as you gain by changing the antenna; otherwise, why bother? At higher
frequencies this may not be the case, but probably not within the realm of a
dual-band HT.

I've been using the Gulyas adapter for years now. I use it primarily for
attaching a Smiley 270 telescopic whip to my VX-5, since that antenna works
very well configured as a 5/8-wave on 70cm. The relative gain in
performance over the stock antenna is quite noticeable, so in that case, the
adapter causes no problems. The fit and appearance of the adapter on that
rig is great, too!

- Doug

"Dave Platt" wrote in message
...
In article ,
Dave Bushong wrote:

You missed my point, I think. The counterpoise is the (poor) metal of
the radio and of the user's hand. Any connector/adapter will be coaxial
and probably low loss, but the counterpoise stays put. The feedpoint
rises but the "ground" plane does not. For an SMA adapter, it might not
be enough to hear a difference, but the radiated signal will be worse
when using such an adapter.

I'd say "may be worse" rather than "will be worse". In some cases, it
may be better.

From what I've seen (and measured) the actual impedances,
"counterpoise" effectiveness, etc. of HT antenna setups vary all over
the map, and change constantly depending on a whole bunch of
factors... how you grip the HT, whether you happen to be wearing a
glove, how you angle the HT near your head (antenna-loading effects
from the head can make SWR change dramatically), and probably whether
you're sweating or not.

A typical HT case is almost certainly _not_ serving as a tuned
counterpoise at 2 meters, nor is your arm and body.

Adding a centimeter or three of SMA-to-BNC connector to the length of
the "counterpoise" may have some small effect in some cases, but I
believe that [1] it's as likely to work for you as against you, and
[2] it's probably less than the sorts of impedance variations which a
typical HT has to face every day as it's moved around the user's head
during transmission.

--
Dave Platt AE6EO