pband [mailto:topband-boun...@contesting.com] On Behalf Of Tom W8JI
Sent: Thursday, September 13, 2012 1:50 PM
To: N2TK, Tony; 'topband'
Subject: Re: Topband: Radials over a stone wall
> Thanks for the info. This is what I was looking for - info from
> someone who has modeled the radials and
Thanks for the info. This is what I was looking for - info from someone
who
has modeled the radials and/or actual experience with measurements.
Going over the wall simplifies things for me both for the shunt fed tower
for topband and for the radials for the 80M 4-sq.
I plan on soldering the radia
radials together for both antennas wherever they
crisscross.
73,
N2TK, Tony
-Original Message-
From: Tom W8JI [mailto:w...@w8ji.com]
Sent: Thursday, September 13, 2012 11:27 AM
To: N2TK, Tony; 'topband'
Subject: Re: Topband: Radials over a stone wall
> Thanks for all the fe
Thanks for all the feedback on how to get the radials over/under/through
the
wall. After playing with this for the past few weeks I realize no way to
go
under as test poundings on rods indicates the wall is too deep.
Tony,
Sometimes things get lost in all the traffic on debatable topics.
You
Thanks for all the feedback on how to get the radials over/under/through the
wall. After playing with this for the past few weeks I realize no way to go
under as test poundings on rods indicates the wall is too deep.
Without dismantling the wall the only way I can get through is possible
drill
- Original Message -
From: "Mike Waters"
To: ; "topband"
Sent: Saturday, August 11, 2012 11:04 AM
Subject: Re: Topband: Radials over a stone wall
> On Sat, Aug 11, 2012 at 9:10 AM, Herb Schoenbohm
> wrote:
>
>> When drilling in stone to prevent o
On Sat, Aug 11, 2012 at 9:10 AM, Herb Schoenbohm wrote:
> When drilling in stone to prevent overheating of the drill bit and tip
> consider using water as a coolant.
>
You have to be careful doing that. Some types of carbide will instantly
crack from the thermal shock of cooling too fast. It's b
here you sit on the ground to work and then lay down
>> when tired and keep drilling!
>>
>> Carl
>> KM1H
>>
>>
>> - Original Message -----
>> From: "Herb Schoenbohm"
>> To: "N2TK, Tony"
>> Cc: "'topband'
rge field stones. It would be rough to drill
>>> through
>>> all of that. I had thought about taking portion of the wall apart but
>>> figured I would never get it back to looking as good as it does now. The
>>> stones go fairly deep so not much chance of going under the wa
On 8/10/2012 4:52 PM, Bill Wichers wrote:
> The directional drilling rigs used for fiber installation "under
> highways", etc., aren't *attachments*, they are big hydraulic machines
> with 6 figure price tags.
Bill I used here a Bobcat with a vibrating plow attachment for short
runs. It also had
t back to looking as good as it does now. The
> stones go fairly deep so not much chance of going under the wall.
>
> 73,
> N2TK, Tony
>
> -Original Message-
> From: Bill Wichers [mailto:bi...@waveform.net]
> Sent: Friday, August 10, 2012 12:26 PM
> To: N2TK, Tony; topband
The directional drilling rigs used for fiber installation "under
highways", etc., aren't *attachments*, they are big hydraulic machines
with 6 figure price tags. I doubt very much anyone would lone one out,
and I wouldn't want to borrow one if I didn't know how to run it. Also,
directional drilling
heavy drill. 73 Clive GM3POI
-Original Message-
From: topband-boun...@contesting.com [mailto:topband-boun...@contesting.com]
On Behalf Of N2TK, Tony
Sent: 10 August 2012 18:21
To: 'topband'
Subject: Re: Topband: Radials over a stone wall
Thanks Bill and Herb about drilling a ho
so not much chance of going under the wall.
>>
>> 73,
>> N2TK, Tony
>>
>> -Original Message-
>> From: Bill Wichers [mailto:bi...@waveform.net]
>> Sent: Friday, August 10, 2012 12:26 PM
>> To: N2TK, Tony; topband
>> Subject: RE: Topba
ng as good as it does now. The
> stones go fairly deep so not much chance of going under the wall.
>
> 73,
> N2TK, Tony
>
> -Original Message-
> From: Bill Wichers [mailto:bi...@waveform.net]
> Sent: Friday, August 10, 2012 12:26 PM
> To: N2TK, Tony; topband
> Subject:
bject: RE: Topband: Radials over a stone wall
I would expect an "up and over" to clear the wall would result in a
choke-like effect on the radial and would, at best, reduce the radial's
effectiveness.
It should be easy to just drill some small (maybe 1/4"?) holes through the
wal
over a stone wall
I can run a NEC simulation tomorrow to see how much radials up and over
affect things.
Dave WX7G
On Aug 10, 2012 10:16 AM, "Herb Schoenbohm" wrote:
> On 8/10/2012 11:17 AM, N2TK, Tony wrote:
> > I shunt feed my tower for topband. I use variable vacuum
d: Radials over a stone wall
What about pushing them thru holes in the wall? I do that with the radials
for a pair of 2 wire Beverages that terminate at trees right at the wall
which has been there since at least the early 1800's.
If you have to push 2-3 thru the same hole it shouldnt mat
Simulation will tell the tale but in the mean time we have two things
caused by the up-and-over that we can mull over:
1) There is cancellation of the magnetic fields by the up-and-over wires
thereby minimizing any additional inductance to the normal radial return
current.
2) current is induced i
I would expect an "up and over" to clear the wall would result in a
choke-like effect on the radial and would, at best, reduce the radial's
effectiveness.
It should be easy to just drill some small (maybe 1/4"?) holes through
the wall in a few places to pass the radials through. With a decent
hamm
I can run a NEC simulation tomorrow to see how much radials up and over
affect things.
Dave WX7G
On Aug 10, 2012 10:16 AM, "Herb Schoenbohm" wrote:
> On 8/10/2012 11:17 AM, N2TK, Tony wrote:
> > I shunt feed my tower for topband. I use variable vacuum caps and a
> vacuum
> > relay at the base to
On 8/10/2012 11:17 AM, N2TK, Tony wrote:
> I shunt feed my tower for topband. I use variable vacuum caps and a vacuum
> relay at the base to switch between the low end and the high end of the
> band. It seems to work okay. I have 100' buried radials spaced 10' at the
> ends from o degrees going clo
What about pushing them thru holes in the wall? I do that with the radials
for a pair of 2 wire Beverages that terminate at trees right at the wall
which has been there since at least the early 1800's.
If you have to push 2-3 thru the same hole it shouldnt matter.
Carl
KM1H
- Original Me
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