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 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
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 use
] 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
15feet, fed in the centre with 300 ohm twinlead
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 radio ;)
But I have a question
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 use
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 use
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, 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 capacitance
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
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 antenna
Mick,
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 select set of
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
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
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
15 matches
Mail list logo
