First, don't expect to land exactly where you expect simply by adjusting the
lengths to a specific dimension. You really need to place the antenna on a
tower to adjust properly and use an antenna analyzer.
The length of feedline from each antenna remains the same. You need to
shorten the
Chuck Kelsey wrote:
First, don't expect to land exactly where you expect simply by adjusting the
lengths to a specific dimension. You really need to place the antenna on a
tower to adjust properly and use an antenna analyzer.
grin
Reminds me of my first experience with a Cushcraft AFM-4DA
If'n I remember correctly...
Fred Vobbe built his own 6m loop antennas for his repeater array -
maybe someone could arm-twist him for his story about the antennas and
harness.
(Sorry Fred - I know you'se busy...)
At 06:28 PM 11/16/09 -, you wrote:
Yes please Jeff...
thanks
Yep I have 2 6 meter repeaters I would be interested in the data to build a
few DB-212 antennas
Neal KA2CAF
--- On Tue, 11/17/09, Adam T. Cately atcat...@bright.net wrote:
From: Adam T. Cately atcat...@bright.net
Subject: Re: [Repeater-Builder] Re: Building Low Band Loop Antennas (DB
FYI - Sinclair got the extra bandwidth by stager tuning the antenna element
from the 1/4-wave matching transformer that is inside the element. The
trade-off was a decrease in return loss (higher VSWR).
Chuck
WB2EDV
- Original Message -
From: skipp025 skipp...@yahoo.com
To:
I've seen some return loss figures in the 30-40 dB range on the Decibel
antenna. However, sweep one and report back.
Chuck
WB2EDV
- Original Message -
From: skipp025 skipp...@yahoo.com
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, November 15, 2009 10:57 AM
Subject:
The low-band loop from Sinclair (SRL 110) was not nearly as wide band as
the Hi band (SRL210) and UHF models (SRL310). The latter were designed
to be mounted either half wave or quarter wave from the tower or mast.
In the case of the low band loop a half wave would have put the loop 10
ft
I was hoping that Burt would chime in.
Chuck
WB2EDV
- Original Message -
From: Burt Lang b...@gorum.ca
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, November 15, 2009 11:57 AM
Subject: Re: [Repeater-Builder] Re: Building Low Band Loop Antennas (DB-212)
The low-band loop from
I have dimensional data for both Decibel and Celwave lowband folded dipoles
*somewhere*. If there's interest I'll hunt for them.
I think the Celwave design (with the stingers) would be easier to
fabricate - no bending involved.
--- Jeff WN3A
-Original
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