On Sat, 6 May 2006, Steve wrote:
Thom,
Sorry for the delay in reply. I'm catching up on a bunch of email from
several email lists...
The author advocates using a 1/4 wave (less 5%) as a counterpoise for this
antenna.
I agree: this does sound a lot like the W3EDP antenna, which is described
i
Thom,
Sorry for the delay in reply. I'm catching up on a bunch of email from
several email lists...
The author advocates using a 1/4 wave (less 5%) as a counterpoise for this
antenna.
I agree: this does sound a lot like the W3EDP antenna, which is described
in "Practical Wire Antennas", pg 33
On Fri, 6 Jan 2006, Michael Babineau VE3WMB wrote:
Steve Aa8af wrote :
In the article "Taming the End-Fed Antenna" ("The Antenna File", RGSB, pg
118) he looked at this issue by plotting various 1/2 wave lengths and
proposed the following end-fed wire lengths:
- 26.5m (86.9 ft) for 160 - 10M
On Fri, 6 Jan 2006, Michael Babineau VE3WMB wrote:
Steve Aa8af wrote :
In the article "Taming the End-Fed Antenna" ("The Antenna File", RGSB, pg
118) he looked at this issue by plotting various 1/2 wave lengths and
proposed the following end-fed wire lengths:
- 26.5m (86.9 ft) for 160 - 10M
Steve Aa8af wrote :
In the article "Taming the End-Fed Antenna" ("The Antenna File", RGSB,
pg
118) he looked at this issue by plotting various 1/2 wave lengths and
proposed the following end-fed wire lengths:
- 26.5m (86.9 ft) for 160 - 10M use
- 15m (49.2 ft) for 80, 40, 20, 17, 15, 12, 10M
[EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Martin Gillen
> Sent: Thursday, January 05, 2006 7:43 PM
> To: elecraft@mailman.qth.net
> Subject: Re: RE: [Elecraft] T1 Antenna Considerations
>
> Hi, Peter.
>
> Please excuse my ignorance I'm fairly new to amateur
PROTECTED] On Behalf Of Ron
> D'Eau Claire
> Sent: Thursday, January 05, 2006 8:19 PM
> To: elecraft@mailman.qth.net
> Subject: RE: RE: [Elecraft] T1 Antenna Considerations
>
> Martin wrote:
>
> "...another antenna I have used is a 66ft length of wire at
> 1
Steve AA8AF wrote:
Alan Chester (G3CCB)(SK) proposed a solution for the high end impedance of a
1/2 wave antenna. Mr. Chester rationalized that there might be some
impedance-friendly length of wire usable for an end-fed antenna that didn't
present the tough-to-tune, high-impedance load on a selec
[EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED]
> Sent: Wednesday, January 04, 2006 4:02 PM
> To: elecraft@mailman.qth.net
> Subject: [Elecraft] T1 Antenna Considerations
>
> Hello
> I have just received my T1 kit and i notice that under the
> a
On Jan 5, 2006, at 10:43 AM, Martin Gillen wrote:
Hi, Peter.
Please excuse my ignorance I'm fairly new
to amateur radio ;)
But I have a question:
The only reason that the "use the nearby bushes"
construct now can be tuned by the T1 is that the
impedance goes low because a part of the antenn
Martin wrote:
"...another antenna I have used is a 66ft length
of wire at 15feet, fed in the centre with 300 ohm
twinlead.
In this case, the driven half of the wire is still
33ft long - but I get really low SWR om 20m and have
worked DX with it,
So why does that work? Is the feedline doing
some
Hi, Peter.
Please excuse my ignorance I'm fairly new
to amateur radio ;)
But I have a question:
> The only reason that the "use the nearby bushes"
> construct now can be tuned by the T1 is that the
> impedance goes low because a part of the antenna is
> lying "on the floor" now, giving high capa
Martin,
> As previously stated a halfwave end fed wire represents a
> very high impedance which is outside of the matching range of the T1.
I agree, the impedance hight depends on the capacitive load of the wire ends
against ground.
> I have found that a halfwave long wire works as long as it is
Hi, Mick.
> please can someone explain why this is important
As previously stated a halfwave end fed wire
represents a very
high impedance which is outside of the matching range
of the
T1.
But thats with no counterpoise or fed against a ground
stake.
I have found that a halfwave long wire works
A half wavelength wire is very high impedance and outside the range of
most auto tuners.
If you're going to use half wave wires, feed them through a 9:1 current
balun. (OK, it's not a balun, it's an impedance transformer)
[EMAIL PROTECTED] wrote:
Hello
I have just received my T1 kit and i not
Hello
I have just received my T1 kit and i notice that under the above heading in
the owners manual under random-wire antennas it states(avoid lengths close to
a multiple of 1/2 wavelength on any band) please can someone explain why this
is important,also i wish to use this tuner on the follo
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