In article .com,
wrote:

You are just one of a small group of people that occupy a few
newsgroups at everyone else's expense.

You are as full of crap as a xmas turkey.

Snip

Plonk

--
Telamon
Ventura, California

Without a ground connected to a battery-operated portable receiver,
for example via the earphone socket, the input impedance at the
antenna socket is umpteen thousand ohms.

So it doesn't matter very much what you do about the whip.

But you knew that before you asked the question. So why ask it? ;o)

I would guess, in your younger days, you were a gifted, over-active
little boy who asked questions with a motive always different from the
obvious one.

It is indeed a very useful technique for gaining information about
which the subject may be reluctant to divulge. Perhaps you should have
been employed as a WMD inspector to discover that none existed years
before Saddam confessed that he never had any and had never possessed
the facilities to manufacture them.

But it's a dangerous occupation. The senior British WMD Inspector
committed suicide shortly after blowing the whistle - or so the story
goes. ;o) ;o) ;o) ;o)

Whilst on the subject of whip antennas you may be interested to run
program WHIP_1 which analyses performance, from transmitter to
receiver input, of a typical vehicle-mounted whip + un-un transformer
+ coax line + receiver.
----
.................................................. ..........
Regards from Reg, G4FGQ
For Free Radio Design Software go to
http://www.btinternet.com/~g4fgq.regp
.................................................. ..........

Snip

Plonk

Again? What? Does your kill file have alzheimers?
This feels like deja vu....MK

MK:

shhhhhh.... Telamon will plonk us.... I think he is the only guy still
reading my posts--would sure hate to lose him, help me out here...
frown

Warmest regards,
John

wrote in message
oups.com...
Snip

Plonk

Again? What? Does your kill file have alzheimers?
This feels like deja vu....MK

As a follow up, found some excellent research on some balun testing for
just the use I mentioned, really good stuff:
http://www.dxing.info/equipment/impe...er_bryant2.doc

John

"John Smith" wrote in message
...
I have a Grundig YB-500 (Yacht Boy 500) shortwave portable. I
frequently take it to remote locations with me and have enjoyed the
radio for years. It has a short pull up whip antenna, all I have done
in the past is to slingshot a long wire into a tree and use a clip lead
to attach it to the pull-up whip (no external ant connections on the
radio).

I was wondering what the impedance the collapsed whip would present, and
what sort or a balun/auto-transformer could be used between a longwire
(or other ant), gnd and the pull-up whip to improve reception...

.... anyone ever done any experimenting or unique ideas?

Warmest regards,
John C. Smith

--
Watching the cutting edge of yesterday replay--in virtual reality, right
before my eyes--in real time!
Thirty year old technology--wasn't it amazing?