On 02/06/2011 02:14 AM, RHF wrote:
On Feb 5, 2:32 pm, wrote:

.
- The only reason, really, I built it this way was to
- allow the 9:1 antenna unun to be mounted near
- ground (the ground is not in place yet, but will be
- soon). Otherwise, I would have put the whole thing
- up high, or possibly sloped with the unun end down.

Close to the Ground is 'good'.
.
- This morning (1800z onward), the VOA relays from
- MDG and BOT (Africa) on 16 and 19 meters were
- coming in almost like locals.
-
- Bruce

Real slopers have the feedpoint at the top.

On Feb 6, 6:09*am, dave wrote:
On 02/06/2011 02:14 AM, RHF wrote:

On Feb 5, 2:32 pm, *wrote:
* .
- The only reason, really, I built it this way was to
- allow the 9:1 antenna *unun to be mounted near
- ground (the ground is not in place yet, but will be
- soon). *Otherwise, I would have put the whole thing
- up high, or possibly sloped with the unun end down.

Close to the Ground is 'good'.
* .
- This morning (1800z onward), the VOA relays from
- MDG and BOT (Africa) on 16 and 19 meters were
- coming in almost like locals.
-
- Bruce

Real slopers have the feedpoint at the top.

Yepp, but then it's a lot harder to get the thing grounded. Either
way, you still get a more omni pattern.

On Feb 6, 6:09*am, dave wrote:
On 02/06/2011 02:14 AM, RHF wrote:

On Feb 5, 2:32 pm, *wrote:
* .
- The only reason, really, I built it this way was to
- allow the 9:1 antenna *unun to be mounted near
- ground (the ground is not in place yet, but will be
- soon). *Otherwise, I would have put the whole thing
- up high, or possibly sloped with the unun end down.

Close to the Ground is 'good'.
* .
- This morning (1800z onward), the VOA relays from
- MDG and BOT (Africa) on 16 and 19 meters were
- coming in almost like locals.
-
- Bruce

Real slopers have the feedpoint at the top.

Dave a "Sloper" Antenna gets it's name from the
fact that the Wire Antenna Element is 'Sloping' :
There are many 'types' of so-called "Sloper" Antennas
-and- Many 'configurations' of so-called "Sloper"
Antennas
-all- Built for a specific Radio Listening {Broadcasting}
needs and equally practical 'design' considerations.

On 02/06/2011 01:49 PM, RHF wrote:
On Feb 6, 6:09 am, wrote:


Real slopers have the feedpoint at the top.


* Most have a High Feed-Point 25~30 Feet and a
Lower End-Point 8~10 Feet {this is to keep the
Lower End-Point 'over-head' and not a Hanging a/o
Tripping Hazard}

Do you know how many volts are at the far end of a dipole when it is fed
100 Watts at resonance?

On 11-02-06 04:10 PM, dave wrote:
On 02/06/2011 01:49 PM, RHF wrote:
On Feb 6, 6:09 am, wrote:


Real slopers have the feedpoint at the top.


* Most have a High Feed-Point 25~30 Feet and a
Lower End-Point 8~10 Feet {this is to keep the
Lower End-Point 'over-head' and not a Hanging a/o
Tripping Hazard}

Do you know how many volts are at the far end of a dipole when it is fed
100 Watts at resonance?


well, if it's at the maximum point of the sine wave, it should be p =
e^2 / r, or e^2 = 100*75, or e = root (7500) = 87 volts

I'm now wondering where the screw up is....I'm assuming a 75 ohm loading.

mike

On Feb 6, 3:10*pm, dave wrote:
On 02/06/2011 01:49 PM, RHF wrote:

On Feb 6, 6:09 am, *wrote:

Real slopers have the feedpoint at the top.

- - * Most have a High Feed-Point 25~30 Feet and a
- - Lower End-Point 8~10 Feet {this is to keep the
- - Lower End-Point 'over-head' and not a Hanging a/o
- - Tripping Hazard}

- Do you know how many volts are at the far end
- of a dipole when it is fed 100 Watts at resonance?

Dave : ? "far end of a dipole" antenna ?

Dave how does that related to a "Sloper" Antennas ?

Many Types and Configurations of "Sloper" Antennas
http://groups.google.com/group/rec.r...7a96ab218b8103

Dave : ? "volts" ? & ? "100 Watts" ?

Generally for Receive Only Shortwave Radio Listening
[SWL] Antennas Transmitting {powered} Parameters
are not a practical consideration. =KASAP=