Over the years I have been bitten by some tenacious flying insects. The
tiniest are the no-see-ums. They will drive you crazy. The largest
were in Arkansas. I swear their mosquitoes were as large as small
sparrows and could take a pint of blood at each involuntary donation.
But the largest swarms were a little north of Marquette, Iowa. My late
wife and I were touring the area near where I grew up when we visited
Effigy Mounds National Monument. She wanted to rest in the high
humidity of a July afternoon. I pointed to the cloud about 100 yards
away and told her we had to keep in front of it. She, life long native
of Washington County Oregon, had no idea what I meant. Stubborn Swedish
blood wanted to make her own mind and donate it. I advised her she
would be eaten alive and kept walking the trail. A few minutes later she
caught up to me and kept her opinion to herself. We got to the parking
lot and left the park without comment.
Kevin. KD5ONS
-
On 6/14/19 4:58 PM, AB4IQ wrote:
Bob I wonder if your mosquitoes are bigger than ours?
Ed..
-----Original Message-----
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bob McGraw K4TAX
Sent: Friday, June 14, 2019 6:54 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] FIELD DAY PREP
Absolutely the best! And the previous scores substantiate such.
I've been using a 134 ft center fed dipole with balanced feed for 50+ years at
my various QTH's. I've yet to find any antenna that performs better and always
consistently without effects of wind, rain, snow and ice.
73
Bob, K4TAX
On 6/14/2019 6:47 PM, AB4IQ wrote:
We use Ladder line fed dipoles. The dipole is 134ft long and the feed
lines
(400 ohm Ladder Line) are cut at 96ft. one of our antennas ladder
line needs an extra length and I think it is cut at 66 ft. extra. We
place the antennas far enough apart but are in a straight line. The
ladder lines are terminated into DXEngineering baluns and with less
than ten feet of coax from the balun to the rigs. We have had three
rigs on the same band but different modes and no interference and have
been doing it this way for years. We gave up on beams, G5RV's, and
verticals long ago. Our call is W4NJA here in Paducah, Ky. and
normally operate 3A with a GOTO Station normally on 6 meters. If you
work us on CW you will be talking to my K3 with all the K3S stuff in it. The
tuner works great on all bands.
Long term forecasts looks like maybe some rain here in far W. Kentucky.
Ed... AB4IQ
-----Original Message-----
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
donov...@starpower.net
Sent: Friday, June 14, 2019 12:50 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] FIELD DAY PREP
When running multiple HF transmitters simultaneously its wise to:
- avoid multi-band antennas, or
- use external bandpass filters, or even better
- avoid multi-band antennas and use bandpass filters
73
Frank
W3LPL
----- Original Message -----
From: "Bob McGraw K4TAX" <rmcg...@blomand.net>
To: donov...@starpower.net
Cc: elecraft@mailman.qth.net
Sent: Friday, June 14, 2019 5:36:21 PM
Subject: Re: [Elecraft] FIELD DAY PREP
Neither should G5RV antennas.
Bob, K4TAX
Sent from my iPhone
On Jun 14, 2019, at 10:44 AM, donov...@starpower.net wrote:
oops... I meant to say:
Inverted V dipole and verticals are NOT allowed at W3AO
73
Frank
W3LPL
----- Original Message -----
From: donov...@starpower.net
To: elecraft@mailman.qth.net
Sent: Friday, June 14, 2019 3:40:43 PM
Subject: Re: [Elecraft] FIELD DAY PREP
We use a dozen K3 transceivers at W3AO, we've never had a K3 failure
despite running as many as four K3s on the same band (CW SSB Digital
and GOTA). The four K3s on each band do not interfere with each other
either.
Our secrets to success:
- same band antennas are horizontally polarized and oriented exactly
end-to-end. Inverted V dipole and verticals are allowed. 100 feet of
tip-to-tip spacing appears to be adequate, although we use much more.
- We install W3NQN bandpass filters on every K3 to avoid overload
from signals from nearby antennas for other bands.
Its not widely known that K3 transceivers have built in bandpass
filters. As far as I'm aware their performance characteristics have
never been published, hence our preference to also also use external
bandpass filters.
73
Frank
W3LPL
----- Original Message -----
From: "Bob McGraw K4TAX" <rmcg...@blomand.net>
To: elecraft@mailman.qth.net
Sent: Friday, June 14, 2019 3:24:01 PM
Subject: Re: [Elecraft] FIELD DAY PREP
With stations running 100 watts or less and reasonable antenna
separation, I've found no reason for a Receiver Input Protector.
Although, it might be a good idea to circumvent a "screw up" by an
operator. I've seen some mighty strange things done by knowledgeable
hams at Field Day.
73
Bob, K4TAX
On 6/14/2019 10:07 AM, KENT TRIMBLE wrote:
Have any of you used Ameritron's "Receiver Input Protector" model
TRP-150? I find no reviews on eHam.
73,
Kent K9ZTV
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