It was disassembled and put in my garage maybe 3 to 5 years ago...... I
do not know exactly when.
If you know W9DX, Steve...it's when he moved back to Illinois.
And it was up a few years before in north Houston area....west of I45 as
I recall. I do not know the age.
Condition.... looks fair.
I paid $500 years ago and haven't used it.
_Make an offer. _It's only taking up space in my garage. Hi.
Bob Hardie
Bob H. W5UQ.com
On 5/26/2022 10:16 AM, Bill via BVARC wrote:
Condition? Age? Assembled or disassembled? Price?
Bill W2WHC
Paige, TX
*From:*BVARC <[email protected]> *On Behalf Of *Bob H via BVARC
*Sent:* Thursday, May 26, 2022 9:29 AM
*To:* [email protected]
*Cc:* Bob H <[email protected]>
*Subject:* Re: [BVARC] Beam antenna for sale
I bought a Force 12 beam, for 40M, 20M, 15M and 10M from a fellow TDXS
ham when he left Houston area. It has been in my garage ever since...
a few years.
Anyone interested in buying it let me know via email first....
Have a great day.
Bob Hardie W5UQ Magnolia, TX
Bob H. W5UQ.com
On 5/25/2022 2:17 PM, Gus Bernard via BVARC wrote:
Attached see the Motorola R65 manual I think Robert is referring
to. I don't know if there's a newer version.
BTW, salt ( with moisture) works well to improve ground rod
conductivity if you can get it down the hole. But as Robert says,
it kills grass and won't last forever.
Gus K5GMB
On Wed, May 25, 2022 at 11:19 AM Robert Polinski via BVARC
<[email protected]> wrote:
John, Hubbell & Nvent-Erico both make threaded ground rods. I
think both need a threaded coupling for both. Chemical grounds
work but are seldom used around here, they become less
effective over time, and need care to install as most use a
sodium based chemical the corrosion factor is high, also no
grass will grow around the rod for years. The practice here
and in most locals is to use multiple rods 6-10ft apart. That
is the practice at most all cell phone sites. Motorola
published a grounding guide for communications sites, deals
with best practices in grounding and lightning protection. Do
not recall the publication # but it is online It is Standards
and Guidelines for Communication Sites. Due note the book is
500+ pages long. Not easy reading, but a good guide. Your
sandy soil is great for pushing in ground rods by hand, that
type of soil is what N5XZ had at his tower site & we pushed in
4 or 5 at his tower base. Sandy soil is fairly conductive when
damp but less so as it dries out (keep the water hose handy)
Robert
*From:* BVARC <[email protected]> *On Behalf Of *john
Parmalee via BVARC
*Sent:* Wednesday, May 25, 2022 9:14 AM
*To:* [email protected]
*Cc:* john Parmalee <[email protected]>
*Subject:* Re: [BVARC] grounding
Robert, thanks for your comments. I will check Elliott for
screw together g rods the next time I am in town. I live in
far southwest Montgomery county, We don't have gumbo here but
sandy loam. When I put my last g rod in I used a section of
PVC connected to a garden hose to wash six or so feet into the
ground then a sledge,
One thing that has not been mentioned is chemical grounds. I
recall trying to make a 35 mHz paging system work. One thing
we did was to install chemical grounds on all the towers
involved. That didn't work, the frequency sees a modern
office building a as a wave guide below cut off and just
doesn't penetrate,
I have read stories about trying to get a good ground while
building across the desert power transmission lines.
John Parmalee
[email protected]
281-380-3811
K5VGM WI2XLJ
In a message dated 5/25/2022 7:13:24 AM Central Standard Time,
[email protected] writes:
Robert,
At my installation the only one I am really concerned
about is the ground for the DSL into my house (NOT
installed by myself) that is a pipe, not a rod. I clamped
a ground wire to a sanded portion of the pipe, and bonded
it to my station ground, but I think the pipe thing is a
real bad idea. Given that it is an AT&T thing, do you
have any suggestions other than what I have done?
Ron
Sent from Mail
<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows
*From: *Robert Polinski via BVARC <mailto:[email protected]>
*Sent: *Tuesday, May 24, 2022 8:29 PM
*To: *john Parmalee <mailto:[email protected]>; BRAZOS
VALLEY AMATEUR RADIO CLUB <mailto:[email protected]>
*Cc: *Robert Polinski <mailto:[email protected]>
*Subject: *Re: [BVARC] grounding
John, they do make thread together rods, when I did
commercial communications I have used them at comm sites.
Here, a 10ft ground rod is fine as are wet gumbo soil
makes a pretty good ground. The NEC requires 2 ground rods
or a ground rod and a ufer ground, which can be rebar in
the slab, metal water line or metal bldg. if in contact
with the earth via rebar or poles. I usually install 2
rods. Most 10 ft ground are easy to push in the ground
with just your hands. I just a few weeks ago installed
additional rods at a hams house in the Heights. I wired a
home in Elgin, just outside of Austin. Had to install
horizonal ground rods as the ground was solid rock 2 ft
down. I always tie to an existing rod but always add an
additional rod as you never know if the old ground rod is
10ft or 18” Here in the Houston area, testing is not
necessary because of the soil, but as the video shows, it
is a neat test. You are correct in your bends in the
grounding conductor, they will act as a choke if made
sharp, also, you should no run the ground wire in metal
conduit for the same reason unless you bond the ground
wire to the conduit at both ends. As far a lightning
goes, remember, all the wiring the strike travels thru on
the way to the earth has resistance & inductance, so by
the time it gets in the circuit the voltage & current are
greatly reduced, still high, but since the duration is
short, a good grounding system will dissipate quickly.
Robert
*From:* BVARC <[email protected]> *On Behalf Of
*john Parmalee via BVARC
*Sent:* Tuesday, May 24, 2022 6:31 PM
*To:* [email protected]
*Cc:* john Parmalee <[email protected]>
*Subject:* Re: [BVARC] grounding
From what the great video says, if you are comfortable
working with 120V the simplest way to check out a ground
rod is to see how much current it will draw and do the
math. Don't attempt this without experience working with
a live circuit. I have been told by licensed
/electricians/that when a new service is turned up if
there is the stub of a ground rod sticking out of the
ground it is good. No testing required.
The thing I don't know is where to get the ground rod to
ground rod connections and the ground rods with the blunt
ends so they can match the previously driven rod. Lowes
only carries the 8 or it 10-foot rods and the coupling to
the flex wire to the service box. I checked Amazon and
found nothing. I am told the local rental yard will rent
a hammer drill and the ground rod driving adapter.
Another comment regarding the ability of a ground to carry
a lightning strike. All bends of the ground wire should
have the gentlest bends possible. A strike of lightning
is a very fast rise time having many harmonics. We know
this because we can hear lightning almost to the VHF
bands, A bend will look like an inductor and raise the
instant ohmic value of a ground rod. On the other hand, a
few turns on a coax or power source lead will increase the
ohms to you rig.it <http://rig.it> will not protect
against a direct hit but might fend off some induced
current from a nearby strike. In south Florida it is
common to tie several knots in your modem phone line. In
Michigan they wrap a phone line around a ¼” bolt , some
washers and a nut..
John Parmalee
[email protected]
281-380-3811
K5VGM WI2XLJ
In a message dated 5/23/2022 7:54:42 PM Central Standard
Time, [email protected] writes:
If any one is interested in ground rod resistance, you
can watch the link below. One thing I want watchers to
note, they have 2 50ft ground rods connected together,
they hook the hot side of a 120v ckt to them and it
only pulls 13 amps (not enough to trip a breaker),
that is why the grounding system must have a bond back
to the power co ground always. Note this is not
related to the RF grounds used as a counterpoise to an
antenna system other than they will be tied together
at a point. Robert
https://www.youtube.com/watch?v=Yg6G5VUSsWA
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