There is no Topband dinner for Dayton this year. Press release was sent out
last night.
See you in 2021
73
Tim K3LR
Dayton Top Band dinner chair
-Original Message-
From: Topband [mailto:topband-bounces+k3lr=k3lr@contesting.com] On
Behalf Of d...@np2j.com
Sent: Monday, March 16, 2020
Yes it was!!
I was also very surprised when Luis IV3PRK answered my CQ last night. During
the last min (2008-11) Luis was pretty much QRV every night. My last QSO with
him was Jan 2019.
Condx were quite good last night into EU, but not many callers….perhaps most
were recovering from a weekend
Hi Dave,
In my experience that is not a typical Norton amplifier gain . Most would be
considerably in excess of that at 11 or 19 dB. They can run from 5 to 19 dB or
so but what would be the purpose of only putting 5 dB there with an expensive
amplifier configuration? The ones I use are 11 dB
Wow, just about fell out of my chair with Joy when I heard Luis (IV3PRK)
calling North American stations on 160 meters CW this morning.
Luis had a very nice signal, and hope we continue to hear him on 160 meters
CW like the old days.
Don (wd8dsb)
_
Searchable Archives:
Circuit gain is accounted for in my calculations. I ran a sim of the input
amp and could get it to work with gains from 0.5 to 2 using different
transformer ratios. So, I think the gain-of-2 I used is good enough.
On Mon, Mar 16, 2020 at 11:32 AM Lee STRAHAN wrote:
> Don’t forget there is
Dayton canceled
Guess No Topband Dinner this year folks
73
Dan K8RF/NP2J
Missed Spring Stew due to the Flu
_
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
Don’t forget there is gain in the signal paths. That first AUX input stage is
a Norton configuration amp with gain controlled by the unknown transformer
ratios. The two J-310's that sum the signals also appear to have a few dB gain.
A full analysis of the circuit is necessary to derive what
Steve,
I performed a hand calculation of the MFJ-1025 14 MHz noise and it's (only)
9 nV/Hz^0.5, or 0.2 uV in 500 Hz. This is -120 dBm, or S-1. But you measure
S-4 noise. What is going on?
Questions to determine what is going on:
Question 1) What model is the radio?
Question 2: What
This is what I have been thinking all along.
On Mon, Mar 16, 2020, 1:47 PM Lloyd - N9LB wrote:
> Possibly static, nearby lightning, or high levels of TX RF may have
> damaged one or more of the semiconductors in your MFJ-1025.
>
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Searchable Archives:
Possibly static, nearby lightning, or high levels of TX RF may have damaged one
or more of the semiconductors in your MFJ-1025.
-Original Message-
From: Topband [mailto:topband-bounces+lloydberg=tds@contesting.com] On
Behalf Of Steve London
Sent: Monday, March 16, 2020 1:33 PM
To:
Roger,
I think you're observations propagation are correct, but I strongly
disagree with the paragraph below. My experience has been that IF the
antenna is accurately modeled, ground characteristics accurately
represent where the antenna is rigged, and the appropriate NEC ground
model is
Hi
I heard you Roger.
But did not distract you from your beloved CQ dx TEST :-))
Almost all of my NA correspondents are old acquaintances.
There are only two new ones - N4BAA, AA2EQ.
There was one QSO with the third zone - K7RL ( It has wonderful TX +
RX).
Also, many from the USA heard me
I did that - terminated in 50 ohms.
73,
Steve, N2IC
On 03/16/2020 12:27 PM, Guy Olinger K2AV wrote:
Depending on the exact circuit and device, to measure noise from the device
itself, don’t you have to terminate the inputs to put the normal impedance on
them? The circuits are often designed
Depending on the exact circuit and device, to measure noise from the device
itself, don’t you have to terminate the inputs to put the normal impedance
on them? The circuits are often designed with the coax Z zero in mind.
73, Guy K2AV
On Mon, Mar 16, 2020 at 12:47 PM Steve London wrote:
> This
I fully agree with the statements below. *Most* of the time, a vertical is
superior for DX on 160m. Please see:
https://web.archive.org/web/20170703105635/http://www.w0btu.com/160_meters.html
73, Mike
W0BTU
On Mon, Mar 16, 2020, 7:52 AM Roger Kennedy
wrote:
>
> ... DX propagation on 160m ISN'T
This has been a very interesting thread - Thanks for all the input.
Perhaps I have set my expectations too high.
A typical application is on 15 meters, late in the opening, working JA's from
here in SW New Mexico. Absent any local QRN, the band is very quiet. Any local
noise covers the bottom
There is nothing special, a 50 feet high dipole has at 25° elevation angle
the same gain as a shortened vertical over lossy ground or with just a few
radials.
73
Peter
-Original Message-
From: Topband [mailto:topband-bounces+dj7ww=t-online...@contesting.com] On
Behalf Of Roger Kennedy
Yes, great to see conditions being good this weekend for the Contest. The
big NA signals were peaking S9 +10 to 15dB over here (which what they always
used to be, but I haven't seen for a while)
I came on for a couple of hours on Saturday night, and managed to work 45 NA
stations, including
Well I've said it dozens of times before . . . but I have used a horizontal
halfwave Dipole (at about 50ft)
for working DX on 160m for the past 50 years ! (and that's at 6 different
QTHs)
Not only do I work all over the world, but I know my signal often compares
pretty well with other Gs using
Back in 2017 I put up a 160M Inverted V with the apex at about 35' and the ends
at 8' with the only goal being to try inband SO2R on 160M. My reasoning was the
V "should" be able to work stations out to ~500Km ( 300 Miles ) and more
importantly hold my run QRG while I went up the band to S for
20 matches
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