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That URL should be , I think.

It's a neat idea and I've saved the page for further study. But if
you're prepared to carry a mast that big around would you lose
anything by simply using it to support a thin wire inverted V or
other type of wire-based antenna, which would be lighter?

Julian, G4ILO

--- In FT817@y..., "Demetre Valaris - SV1UY" <sv1uy@s...> wrote:

Hi guys and gals,

If one would like to make a cheap dipole and IDEAL DIPOLE for
portable or backpacking work with his FT-817, there is a very nice
design from Budd W3FF

[snip]

I should have added that after finding the length that worked, I took
the wire off the glass and taped the coil together. Though I suppose
it could be handy to take a glass with you when going /P in case you
stop by a stream and are thirsty!

Julian, G4ILO



--- In FT817@y..., julian@t... wrote:

... I found that
winding the end of the counterpoise on to a 3in diameter former (a
breakfast glass) created an inductor that electrically lengthened

the

counterpoise. I used this for the 40m counterpoise for my ATX.

Hi again,

Sorry I made a slight mistake on Budd`s URL

It should be

73 de Demetre SV1UY

Hi guys and gals,

If one would like to make a cheap dipole and IDEAL DIPOLE for
portable or backpacking work with his FT-817, there is a very nice
design from Budd W3FF. This is a very nice and lightweight
selfsupported dipole of about 5 meters maximum length form tip to
tip, made from 1/2 inch, external diameter, plastic PVC tube and 2
telescopic whips at each end. I already have one and I am really
happy with its performance on the mountain. This dipole is about 60
cm long when closed.

For full details on this antenna, here is Budd`s W3FF Web page:



Of course some kind of support is needed and one can use some sort of
telescopic aluminium pole such as the one painters or glass cleaners
use. I have a 4 section aluminium pole and it can go up to 5.8 meters
when fully open. This mast although lightweight, is about 1.55 meters
tall when closed. I also have a 3 meter 2 section aluminium mast and
that could be used as well because it is more lightweight. I use them
as walking stick when I go hiking on the mountain, but they are a bit
tall as walking sticks! hi hi hi!!!

One could also use 5 or maybe more 60 cm pieces of plastic water
pipes, 1/2 or 3/4 inch internal diameter, and employ screw or push
couplers to connect the 60 cm pipes together in order to make a 3
meter or taller tall mast for this dipole (just like someone else
before me suggested in this group a couple of days ago).
In this case you could have a really small antenna package when it is
closed because the mast sections are only 60 cm long.
Off course weightwise a 3 meter 3/4 internal plastic water pipe is
probably heavier than the equivalent 2 section 3 meter tall aluminium
pole, but the 3 aluminium pole that I have is about 1.5 meters when
closed.

73 de Demetre SV1UY

--- In FT817@y..., "KQ6XA" <xtalradio@a...> wrote:

Because it is at the end of the wire, the inter-winding capacitance
makes it look like a metal blob to the RF.

Interesting. In my experiments with wire counterpoises, I found that
winding the end of the counterpoise on to a 3in diameter former (a
breakfast glass) created an inductor that electrically lengthened the
counterpoise. I used this for the 40m counterpoise for my ATX.

IMHO, steel tape counterpoises are actually only efficient for
upstairs indoor use on an insulated floor. When laid out on soil

earth

ground, they couple too much RF into the earth, which is a waste of
QRP power. A resistor may have a good SWR, but it doesn't radiate
well.

If steel tape counterpoise radials are elevated on a picnic table,
chairs, or other supports, they can be effective and efficient.
Otherwise, they can be more lossy than wires when used as a
quarterwave vertical counterpoise system.

This may be true of wire counterpoises too, to a certain extent. But
surely the situation is no different to that when you bury a number
of radials in the ground to create a ground plane for a fixed base
vertical antenna? Surely the more efficient ground coupling should
make the antenna perform better, not worse? The problem indoors is
that no bit of wire is going to form an effective ground plane. So in
effect what you have there is a dipole with an electrically shortened
vertical leg and the other half lying on the floor. What you have
outdoors is a vertical with a half-decent ground plane.

Julian, G4ILO

--- In FT817@y..., IslPilot@a... wrote:

Demetre:

Most of my operations with the FT817 are "motel Mobile" and I have

observed

the same characteristics with the MP1 outperforming my previous

dipoles and

loops. The MP1 seems to be much less sensitive to the

inherent "noise" of

the hotels and definitely gets out better.

I am very pleased with the MP1 for my applications, even though I

don't quite

understand why the difference in performance.

Paul
KB8VWV

Hi Paul and group,

I always enjoy using my MP-1 especially when I must keep my antenna
out of sight. You see it can be installed right next to the window
for clandestine operations (well sort off, hi hi hi!!!), such as in a
hotel room. I bet if you ask the hotel manager for permission to
operate a ham radio transceiver, he would say NO!!! So outdoor
dipoles and the like are definately out of the question. Of course a
dipole operates better on the mountain, but then again one could get
a hold of 2 MP-1s and operate them as a dipole, in a horizontal,
sloping or vertical configuration. Unfortunatelly this solution is a
bit costly. If you go to and
click on the files section, you will see Vern holding 2 X MP-1
antennas as a dipole.

Also one elevated tuned counterpoise (even if it is half lying on the
ground) changes a vertical whip to some sort of vertical dipole. Not
perfect, but it is an asymetrical vertical dipole, or even an "L"
antenna if one manages to keep the counterpoise horizontal and high
above ground, i.e. on a pic-nic table.

73 de Demetre SV1UY


P.S. This talk gets more and more interesting guys and gals.

Well, they do have experience......

I purchased the VX-5 software they came out with and found some bugs so I used "EVE" to program my VX-5

I since received an update but have yet to play with it.

I will probably buy the RT systems program software for my 817

Enter your vote today! A new poll has been created for the
FT817 group:

If out in the wild, what antenna would
ideally use with your FT-817 on Field
Day

o MP-1 / PW-1
o G5RV
o Homebrew vertical
o Homebrew dipole
o BNC "Whip" Antenna


To vote, please visit the following web page:



Note: Please do not reply to this message. Poll votes are
not collected via email. To vote, you must go to the Yahoo! Groups
web site listed above.

Thanks!

I've got a 10 pack of alkalines and 2 spades so I can tap whatever voltage.
I just got a set of rechargables so I mentioned them

--- In FT817@y..., thomas4174@y... wrote:

RT Systems have just posted their computer control
software for the FT-817. I have the software
for the Icom IC-Q7A and it works pretty well.
Has anyone tried the FT-817 software yet?
It seems the company wants $25 with $5 shipping
up front, with no chance to see what you're getting.
Comments???

It is true. At last, RT Systems is ready to release it.

For those of you going to Dayton, drop by and see it at our Booth. We
should have copies for sale on site by Saturday. I just received the
program and hopefully I will have had time to become familiar with it
by the time the gates open on Friday.

73 de Barry - W4WB
W4RT Electronics
Booth 114

RT Systems have just posted their computer control
software for the FT-817. I have the software
for the Icom IC-Q7A and it works pretty well.
Has anyone tried the FT-817 software yet?
It seems the company wants $25 with $5 shipping
up front, with no chance to see what you're getting.
Comments???

--- In FT817@y..., julian@t... wrote:

...It holds 7 metres of wire and costs 15
quid. I don't know if it is the same as the Radio Shack one that has
been mentioned...
...
--- In FT817@y..., "Sharyl - W3VET" <w3vet@a...> wrote:

By the way for those who don't know,
the radio Shack roll up is designed like a very small chalk line

reel.

A small spool of hookup wire, an alligator clip, and a rubber band
work pretty well, too.

Frank
AB2KT

--- In FT817@y..., "Sharyl - W3VET" <w3vet@a...> wrote:

You can use some rechargable AA's or even AAA's in a pack to make

the

voltage.

Or even plain old AA alkalines? I'm still on the first set of 8 after
a month...keeps on going, and going, and...

Frank
AB2KT

I have been using the Radio Shack roll up as a counterpoise for a few months now and it works great
on 20 meters and up.
I can always get a match very quickly with my AT mono band whip antennas and have worked some
great DX from the kitchen table!.

73 Bill
W9WCR

Gee I even know what that is..... Mike 24th Corp Atry

From: "Sharyl - W3VET" <w3vet@...>
Reply-To: FT817@...
To: <FT817@...>
Subject: Re: [FT817] Re: chalk line explanation -chopsticks
Date: Wed, 16 May 2001 13:54:26 -0700

Only if you put Nouc Mam on your Phood.
Then you shall reach full elevation

Sharyl,

I was waiting for some Zen reply like

"First use fingers, then chopsticks until you reach elevation."

_________________________________________________________________
Get your FREE download of MSN Explorer at

From: "KQ6XA" <xtalradio@...>

If steel tape counterpoise radials are elevated on a picnic table,
chairs, or other supports, they can be effective and efficient.
Otherwise, they can be more lossy than wires when used as a
quarterwave vertical counterpoise system.

I can vouch for this in my experiments with the Maldol whips ... the
counterpoises work MUCH better it seems when they are above the ground. My
empirical experience has been at "picnic table height" but there is nothing
scientific about that -- just the practical realities ;-)

Good observation, Bonnie!

73 es Happy QRP-ing!
Stephen
W3SMK

Hi to all.

For portable antenna, i take the hamstick PRO-AM, i put it on a
photographic tripod, and i add 3 radials of 0.25 wavelengh each.

That work very well for 80,40,20 and 17 meter, but for 15 and 10 meter
i don't know why ,but i'm unable to have a resonnant frequency and a
goog swr.

Good work and 73.

Marc VA2MGL

Julian, G4ILO wrote:

Thanks. What happens with the coiled up part of the tape?

Because it is at the end of the wire, the inter-winding capacitance
makes it look like a metal blob to the RF.

IMHO, steel tape counterpoises are actually only efficient for
upstairs indoor use on an insulated floor. When laid out on soil earth
ground, they couple too much RF into the earth, which is a waste of
QRP power. A resistor may have a good SWR, but it doesn't radiate
well.

If steel tape counterpoise radials are elevated on a picnic table,
chairs, or other supports, they can be effective and efficient.
Otherwise, they can be more lossy than wires when used as a
quarterwave vertical counterpoise system.

Bonnie KQ6XA

Sharyl writes:

If I have say-20 feet wound up with 22 gauge coated wire
how much loss do you estimate into the load percentage wise?

The loss would be insignificant.
Essentially, because the the reel is on the end of the wire, it looks
like a blob of metal to HF radio frequencies, due to inter-winding
capacitance.

Bonnie KQ6XA

-- In FT817@y..., Paul Davidson <ve3uum@r...> wrote:

** Reply to message from lhilborn@v... on Tue, 15 May 2001
21:39:40 -0000

The Public Service column of this month's (June) QST gives you a
sense of what's in store for my FT817 this summer> >

Hi Len:

I read the article and it's very good. Was thinking that the guy in

the

article (You) needed an 817!

Hi Paul
Glad you enjoyed the bear story...ham radio saved our bacon - pun
intended ! Next trip to the north will also include the MP1 antenna
as backup and a lot lighter gel cell as the Argosy needed a 22amp/hr
battery for the week of remote operation. The weight we save on the
plane will be replaced by a shotgun!
Cheers
Len VE3CSS