Today's Message Index:
----------------------
1. 06:28 AM - simple antenna for 704 mHz (rd2)
2. 07:42 AM - Re: simple antenna for 704 mHz (user9253)
3. 08:10 AM - Re: Re: simple antenna for 704 mHz (David Carter)
4. 10:05 AM - Re: Re: simple antenna for 704 mHz (rd2)
5. 10:22 AM - Re: Re: simple antenna for 704 mHz (David Carter)
6. 12:36 PM - Re: Re: simple antenna for 704 mHz (rd2)
7. 01:31 PM - Re: 30A PM alternator and Z101? (Eric Page)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | simple antenna for 704 mHz |
Hi all-
I have a SwitcheOn box in a metal hangar to turn on/off the engine heater r
emotely with my cell phone. The box uses the IoT cell network at 704 Mhz (~
42 cm full wave) and the signal strength is dismal, so the box often goes o
ffline and I have to drive up to the hangar and restart it, which defeats i
ts purpose. With hangar door open, the signal improves.
I'd like to build a simple antenna, but my antenna knowledge is limited. Wo
uld the following work (see attached screenshot):
-strip jacket and outer conductor to expose 42 cm of inner conductor with i
nsulation =93 this becomes the full wave antenna;
-let that 42 cm antenna hang from top of hangar down along the wall (so as
not to anger the FBO);
-ground the outer conductor at the antenna end to the metal hangar.
Any suggestions, thoughts?
Thanks
Rumen
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: simple antenna for 704 mHz |
According to this website
https://service.shure.com/s/article/quarter-wave-antenna-dimensions?language=en_US
a 704Mhz 1/4 wavelength antenna is 4 inches long.
Strip about 6 inches of outer insulation from the coax.
Push the outer braid so that it expands and slides back over the coax cable.
Trim the outer braid so that it is 4 inches long. This acts as a ground plane.
Cut the center conductor so that 4 inches is exposed.
Do not connect to metal hangar.
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=507041#507041
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: simple antenna for 704 mHz |
I bought an inexpensive magnetic mount external antenna for my GSM / 4G
switch (different brand from yours, but works the same.)
https://smile.amazon.com/SUPERBAT-Magnetic-External-Antenna-T-Mobile/dp/B09GFCZ35B
There are lots of similar antennas available on Amazon.
Here's one with a non-magnetic mount:
https://smile.amazon.com/Bingfu-Waterproof-T-Mobile-Cellular-Amplifier/dp/B07R9JGLV5
---
David Carter
david@carter.net
On Tue, May 24, 2022 at 10:43 AM user9253 <fransew@gmail.com> wrote:
>
> According to this website
>
> https://service.shure.com/s/article/quarter-wave-antenna-dimensions?language=en_US
> a 704Mhz 1/4 wavelength antenna is 4 inches long.
> Strip about 6 inches of outer insulation from the coax.
> Push the outer braid so that it expands and slides back over the coax
> cable.
> Trim the outer braid so that it is 4 inches long. This acts as a ground
> plane.
> Cut the center conductor so that 4 inches is exposed.
> Do not connect to metal hangar.
>
> --------
> Joe Gores
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=507041#507041
>
>
Message 4
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: simple antenna for 704 mHz |
Thanks David, however an antenna that looks like an antenna is what I want to avoid
due to FBO restrictions.
----- Original Message -----
From: David Carter <david@carter.net>
Sent: Tue, 24 May 2022 11:10:05 -0400 (EDT)
Subject: Re: AeroElectric-List: Re: simple antenna for 704 mHz
I bought an inexpensive magnetic mount external antenna for my GSM / 4G switch
(different brand from yours, but works the same.)
https://smile.amazon.com/SUPERBAT-Magnetic-External-Antenna-T-Mobile/dp/B09GFCZ35B
There are lots of similar antennas available on Amazon.
Here's one with a non-magnetic mount:
https://smile.amazon.com/Bingfu-Waterproof-T-Mobile-Cellular-Amplifier/dp/B07R9JGLV5
---
David Carter
david@carter.net
On Tue, May 24, 2022 at 10:43 AM user9253 <fransew@gmail.com> wrote:
According to this website
https://service.shure.com/s/article/quarter-wave-antenna-dimensions?language=en_US
a 704Mhz 1/4 wavelength antenna is 4 inches long.
Strip about 6 inches of outer insulation from the coax.
Push the outer braid so that it expands and slides back over the coax cable.
Trim the outer braid so that it is 4 inches long. This acts as a ground plane.
Cut the center conductor so that 4 inches is exposed.
Do not connect to metal hangar.
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=507041#507041
==========
-
Electric-List" rel="noreferrer" target="_blank">http://www.matronics.com/Navigator?AeroElectric-List
==========
FORUMS -
eferrer" target="_blank">http://forums.matronics.com
==========
WIKI -
errer" target="_blank">http://wiki.matronics.com
==========
b Site -
-Matt Dralle, List Admin.
="noreferrer" target="_blank">https://matronics.com/contribution
==========
Message 5
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: simple antenna for 704 mHz |
On Tue, May 24, 2022 at 1:06 PM rd2 <rd2@dejazzd.com> wrote:
> Thanks David, however an antenna that looks like an antenna is what I want
> to avoid due to FBO restrictions.
>
>
100% understand. I found that all I needed to do with mine was to raise it
a few feet on the interior wall of the metal t-hangar to get adequate
reception. The fire-resistant dividing walls in the hangar are sheetrock
attached with screws. The magnetic base of the antenna grips one of the
screw heads about 10' up & very close to the sliding metal door. It's
inside, so no one is the wiser.
---
David Carter
david@carter.net
>
Message 6
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: simple antenna for 704 mHz |
Yeah, I tried this method, but it did not work... had a similar 8 dB antenna (supposedly)
specifically tuned to my frequency from amazon. Magnetic base on a
T-shaped bracket high (close to ceiling) electrically connected to hangar wall.
(all my T-hangar walls are sheet metal); have a way to measure signal strength
- no difference...seems the only way is to bring a camouflaged antenna to the
outside.
----- Original Message -----
From: David Carter <david@carter.net>
Sent: Tue, 24 May 2022 13:21:17 -0400 (EDT)
Subject: Re: AeroElectric-List: Re: simple antenna for 704 mHz
On Tue, May 24, 2022 at 1:06 PM rd2 <rd2@dejazzd.com> wrote:
Thanks David, however an antenna that looks like an antenna is what I want to avoid
due to FBO restrictions.
100% understand. I found that all I needed to do with mine was to raise it a few
feet on the interior wall of the metal t-hangar to get adequate reception. The
fire-resistant dividing walls in the hangar are sheetrock attached with screws.
The magnetic base of the antenna grips one of the screw heads about 10' up
& very close to the sliding metal door. It's inside, so no one is the wiser.
---
David Carter
david@carter.net
Message 7
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: 30A PM alternator and Z101? |
Paul Dye's write-up on the Monkworkz MZ-30L:
https://www.kitplanes.com/the-monkworkz-mz-30l-direct-drive-generator/
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=507050#507050
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|