Yes, I don't know why the db-201 has such ridiculously long radials, but that
is how they were designed. Go figure. I would like to know why though if
someone knows...
73
- Original Message -
From: Repeater-Builder@yahoogroups.com
To: Repeater-Builder@yahoogroups.com
Sent: Sat Feb 20 2
First, the DB-201 was not designed for tower side-mounting, so don't expect
it to work well. That said, how far away from the tower will the antenna be?
There's a real good chance that the VSWR will go sour when it's
side-mounted. However, I have no personal experience with that antenna, but
in
of
that is in use anymore.
Good Luck!
-Richard
From: Chuck Kelsey
To: Repeater-Builder@yahoogroups.com
Sent: Sun, February 21, 2010 8:36:35 AM
Subject: Re: [Repeater-Builder] Re: DB-201 Measurements for 6 Meters?
First, the DB-201 was not designed for t
> Yes, I don't know why the db-201 has such ridiculously long
> radials, but that is how they were designed. Go figure. I
> would like to know why though if someone knows...
> 73
The venerable quarter-wave vertical antenna seems like such a simple
antenna, but the physics behind it aren't al
Various ARRL publications cite the 5% longer "rule." Right or wrong, who
knows?
Chuck
WB2EDV
- Original Message -
> I haven't found any factual basis to back up the notion that the radials
> should be 5% longer than the vertical radiator.
> Various ARRL publications cite the 5% longer "rule." Right or
> wrong, who
> knows?
>
> Chuck
> WB2EDV
At the risk of offending someone somewhere, the fact that the ARRL cites the
"5% rule" without backing it up with the analysis behind the rule doesn't
really suprise me...
Think about it th
Yep, I know. I just wanted to let you know where the info was coming from.
Chuck
WB2EDV
- Original Message -
From: "Jeff DePolo"
To:
Sent: Sunday, February 21, 2010 4:45 PM
Subject: RE: [Repeater-Builder] Re: DB-201 Measurements for 6 Meters?
>> Various ARRL publica
> > Think about it this way. If you made a dipole, would you
> > cut one side 5% longer than the other?
>
> Maybe, if you had a reason for offset feed... but most offset
> Dipoles are not 5% different. I thought the subject was about
> 1/4 wave ground planes and not dipoles... they are not the
On Mon, 22 Feb 2010, Jeff DePolo wrote:
> Kinda along the same lines as "always make the cable from the
> connector on the transmitter to the connector on the duplexer an even
> half-wave".
The reason for doing that is that if the duplexer presents a
short-circuit, said short-circuit won't appe
> On Mon, 22 Feb 2010, Jeff DePolo wrote:
> > Kinda along the same lines as "always make the cable from the
> > connector on the transmitter to the connector on the
> duplexer an even
> > half-wave".
>
> The reason for doing that is that if the duplexer presents a
> short-circuit, said short-c
On Mon, 22 Feb 2010, Jeff DePolo wrote:
> > On Mon, 22 Feb 2010, Jeff DePolo wrote:
> > > Kinda along the same lines as "always make the cable from the
> > > connector on the transmitter to the connector on the
> > duplexer an even
> > > half-wave".
> >
> > The reason for doing that is that if th
> -Original Message-
> From: Repeater-Builder@yahoogroups.com [mailto:Repeater-
> buil...@yahoogroups.com] On Behalf Of Kris Kirby
> Sent: Monday, February 22, 2010 5:03 PM
> To: Repeater-Builder@yahoogroups.com
> Subject: RE: [Repeater-Builder] Re: DB-201 Measure
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