On 01/25/2012 03:56 PM, W0UCE wrote:
> There is unintentional QRM on all bands when DX is working Split. People
> don't check to make sure they are using SPLIT and TX on the DX stations
> calling freq.
>
> I know this for fact as I have been unintentionally guilty
> myself for not looking to make
Dave, Filipe, anyone. my helix-wound vertical has a couple of elevated
radials, which are not grounded. Everything sits above "ground", fed direct
with 50 ohm coax, about 20 ohms R at feedpoint. I have a 2.5 : 1 SWR in the
shack over about 60 KHz of the band. I haven't had it up very long
Sure glad I found this TB reflector with the scoop on everything
from antennas to protocol.
I would be lost without the sage advice of my big (signal)
brothers.
.
73
jim / W1FMR
--- On Wed, 1/25/12, Glenn Wyant wrote:
From: Glenn Wyant
Subject: Re: Topband: Unintentional QRM on TB
Anyone has idle station or needs operating help in CQ 160?
K3BU will travel and operate for food, jus' tired from resort business and need
a radio break.
Yuri, K3BU.us
___
UR RST IS ... ... ..9 QSB QSB - hw? BK
Fil,
My 80/160m antenna is configured identically to yours on 160m. Same
dimensions. In my case, with 90 radials of various lengths, I measured
an Rr of 16 ohms at the feed point. The SWR exceeded 2:1 in the shack.
I use a hairpin coil recommended by K2KW (Team Vertical) to bring the
impeda
There is unintentional QRM on all bands when DX is working Split. People
don't check to make sure they are using SPLIT and TX on the DX stations
calling freq.
I know this for fact as I have been unintentionally guilty
myself for not looking to make sure...
Woops... Sorry,
73,
Jack
If you he
Filipe:
Why bother putting out radials when you can use a K2AV 160 Meter Folded
Counterpoise?
Take a look: http://www.w0uce.net/K2AVantennas.html
73,
Jack W0UCE
-Original Message-
From: topband-boun...@contesting.com [mailto:topband-boun...@contesting.com]
On Behalf Of ct1...@sapo.pt
S
The radiation resistance is 25 ohms. I estimate your base referred ground
loss resistance to be 10 ohms. So, you should expect a VSWR of 1.4:1 fed
directly with 50 ohm coax.
To obtain a better match you could place a shunt inductor (start with 4 uH)
across the feedpoint but you will have to shorte
On 1/25/2012 11:27 AM, ct1...@sapo.pt wrote:
> My question is regarding the feeding of the antenna, should it be
> straight with 50 Ohm cable?
Hi Filipe,
That's the best solution, assuming that you have a tuner in the shack
(or an amplifier with a tuned output that can handle a modest mismatch),
Hi Everyone,
just finishing puting up a T Vertical (exactly in T shape) using 2
supports at the ends.
The vertical portion is 18m and the T is 17m to each side (34m total).
I am laying radials from 20m - 40m (have about 20 right now).
My question is regarding the feeding of the antenna, shoul
Worked them during a "12" period right on 1812. He was only listening
exactly on 12 and at the time was clearly having a hard time hearing. 73,
Guy.
On Wed, Jan 25, 2012 at 1:49 PM, N1BUG wrote:
> > I listened to HK0NA this morning around 1.8328 and he was sending
> > "12" after his CQ. and
> I listened to HK0NA this morning around 1.8328 and he was sending
> "12" after his CQ. and folks were madly calling 12 Khz up, and
> 12 Khz down from his frequency.
While it may not be an every day thing, this is common enough on
topband so that anyone seriously attempting to work DX there
If you hear a DX station working people , and cant hear the
callers ... well I suggest you tune around until you find the
pileup... easy !
Using 1812 allowed him to work NA and JA
No matter what some people just never clue in ...
Glenn VA3DX
Subject: Re: Topband: Unintentional QRM on TB
Jim,
Jim,
I disagree with your final comment. The sender is always responsible for
insuring he won't cause interference to ongoing communications when he comes on
frequency. Yes, the directions from HK0NA were unclear but I would venture he
was listening for JAs as their bandplan limits their operat
I listened to HK0NA this morning around 1.8328 and he was sending "12" after
his CQ.
and folks were madly calling 12 Khz up, and 12 Khz down from his frequency.
Also lots of callers were calling around 1.812.
All I have is RIT on the 5w. Elecraft K1 and couldn't work him even if I had
dua
Id expect the lower RF resistance of 2X more wire would help also.
My only cage experience were a pair of 1/4 wave verticals for 80 that were
also fed as half waves on 40 at a prior QTH here in the same town. The cage
was 6 #12 wires 12" in diameter; 2:1 BW was almost 400KHz on 80 and
resonance
That's great news! WAZ would be of GREAT interest to me. Hopefully, that won't
be in the too distant future. LoTW seems to be easily to use for those chasing
counties too. Cooperation to benefit the larger community always makes sense in
my opinion.
I'd also like to join with Jim complimenting
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