Date   

Upcoming Event: Wednesday Evening 40 and 80 meter Nets - Wed, 06/17/2020 20:00-21:00 #cal-reminder

main@4SQRP.groups.io Calendar <main@...>
 

Reminder: Wednesday Evening 40 and 80 meter Nets

When: Wednesday, 17 June 2020, 20:00 to 21:00, (GMT-05:00) America/Chicago

Where:40 and 80 Meters

View Event

Organizer: jomatlock@...

Description: The 40 Meter Net will be at 8:00 pm central time  on 7.122 +-. QRM
NCS is WQ5RP/ACØBQ 

Wednesday evening 80 Meter CW Net. will be at  (8:30PM Central Time Wednesday). 



The 80 meter net will be called on 3.564 MHz +/- QRM.
Net control operator is Johnny ACØBQ 

* NEW *  Wednesday evening DMR Voice Net will be at (Thursday) 0300 UTC (9:00PM Central Time Wednesday/)
Four States QRP has a Brandmeister DMR Talk Group (TG31654). Join us to discuss QRP, ask questions, or just ragchew. The Wednesday net is a directed net  but any other time you may use the Talk Group to chat with other QRPers.
Net Control operator is Bert NØYJ.


Re: The mysteries of tuning a random wire

Ronald Morrison
 

If you search for W4RNL you will find many great articles on antennas, tuners, etc.

Ron, K5DUZ

On Wednesday, June 17, 2020, 06:43:37 AM CDT, Jeff Logullo N0̸MII <jeff@...> wrote:


Great find Ron — thanks for sharing!

W8JI’s site has a lot of good material. Found this page


which has advice on tuning T-match tuners for maximum efficiency. (Was that in this thread, or another?)


On Jun 17, 2020, at 2:44 AM, Ronald Morrison <rmrrisn@...> wrote:

Highly recommended reading. Note recommendation about not connecting the counterpoise to the station ground.


Ron, K5DUZ

--
Jeff N0̷MII


Re: The mysteries of tuning a random wire

Dave W0DCX
 

Taking the next step I took N5IB's advice and took the impedance calculations to completion.  I'm not sure if the VNA will do this for me, but for now I constructed an Excel spreadsheet where I can just plug in the values the VNA gives me and get the final results.  I've checked the calculations a few times and don't find any errors.  The results still puzzle me.  Some of the numbers I can rationalize from the actual behavior of my ATU but then some of the numbers don't make sense.  I may be doing something wrong, or maybe there is some sort of voodoo going on in my wires.


Second Sunday Sprint Results for June

John Lonigro
 

Participation was down for June - only 9 entries.  I guess with more states loosening up restrictions, not as many of us are staying home anymore.  Regardless, we did have a new participant: Brian (KB9BVN) from New Whiteland, IN.  Welcome Brian!  I hope you become a regular in the 4SQRP Second Sunday Sprint.

The June winner was Chas, W2SH, with 16 QSO points, followed by Glenn, N4MJ, with 14.  Tied for third place were Nick, WB5BKL, and Carl, AA5VE (good call), with 12 points each.  Chas will receive his June certificate shortly.

With the June contest behind us, we've reached the halfway point for 2020.  Leading the pack for the year is Chas, W2SH, with 97 points, followed by John K4BAI with 75 points and Nick WB5BKL with 63.  Any of the first six or eight participants has a good chance of catching up with Chas or at least finishing in the top three.  Recall that the three top finishers at the end of the year will all receive certificates.

I hope everyone has a good Field Day, as least as good as possible this year.  Have a good July 4th as well.

72 until July 12,

John, AA0VE
4SQRP Contest Coordinator


Re: The mysteries of tuning a random wire

Jeff Logullo N0̸MII
 

Great find Ron — thanks for sharing!

W8JI’s site has a lot of good material. Found this page


which has advice on tuning T-match tuners for maximum efficiency. (Was that in this thread, or another?)


On Jun 17, 2020, at 2:44 AM, Ronald Morrison <rmrrisn@...> wrote:

Highly recommended reading. Note recommendation about not connecting the counterpoise to the station ground.


Ron, K5DUZ

--
Jeff N0̷MII


Re: The mysteries of tuning a random wire

Ronald Morrison
 

Highly recommended reading. Note recommendation about not connecting the counterpoise to the station ground.



Ron, K5DUZ




Re: NJQRP Skeeter Hunt numbers

Johnny AC0BQ
 

Same up here Tom
Go outside just before dark!!
Plenty of em around here too!
72
Johnny ACØBQ 

On Tue, Jun 16, 2020 at 7:31 PM Tom Sevart <tmsevart@...> wrote:
On 6/14/2020 19:40, Larry Makoski wrote:
> Skeeter Hunters!
>
> The Ninth Annual NJQRP Skeeter Hunt is set for Sunday, August 16th.
>

If you really want to find skeeters, just come to my back yard.

--
Tom Sevart N2UHC
St. Paul, KS

--
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus




--
Check out the 4SQRP website at 4sqrp.com


Upcoming Event: Wednesday Evening 40 and 80 meter Nets - Wed, 06/17/2020 20:00-21:00 #cal-reminder

main@4SQRP.groups.io Calendar <main@...>
 

Reminder: Wednesday Evening 40 and 80 meter Nets

When: Wednesday, 17 June 2020, 20:00 to 21:00, (GMT-05:00) America/Chicago

Where:40 and 80 Meters

View Event

Organizer: jomatlock@...

Description: The 40 Meter Net will be at 8:00 pm central time  on 7.122 +-. QRM
NCS is WQ5RP/ACØBQ 

Wednesday evening 80 Meter CW Net. will be at  (8:30PM Central Time Wednesday). 



The 80 meter net will be called on 3.564 MHz +/- QRM.
Net control operator is Johnny ACØBQ 

* NEW *  Wednesday evening DMR Voice Net will be at (Thursday) 0300 UTC (9:00PM Central Time Wednesday/)
Four States QRP has a Brandmeister DMR Talk Group (TG31654). Join us to discuss QRP, ask questions, or just ragchew. The Wednesday net is a directed net  but any other time you may use the Talk Group to chat with other QRPers.
Net Control operator is Bert NØYJ.


Re: NJQRP Skeeter Hunt numbers

Tom Sevart
 

On 6/14/2020 19:40, Larry Makoski wrote:
Skeeter Hunters!
The Ninth Annual NJQRP Skeeter Hunt is set for Sunday, August 16th.
If you really want to find skeeters, just come to my back yard.

--
Tom Sevart N2UHC
St. Paul, KS

--
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus


Re: DMR - A quick quesion

Mike Heitmann
 

Hi Wayne,

You will need a DMR capable rig and access to a either a DMR repeater or a personal “hotspot”.

A hotspot is a very simple simplex access point usually consisting of a rRaspberry Pi equipped with an RF Digital Voice “hat” such as a DVMega or MMDVM. The hotspot will need Internet access, wifi or Ethernet,  to link your digital voice stream coming from the rIg as RF to the 4SQRP DMR Talk Group.

I have a DMR HT - an Anytone AT-D878UV.  I usually connect to the the 4SQRP Talk Group through my Raspberry Pi DMR “hotspot”.  I also Have used the AT-878 to go through a local DMR repeater to access the Talk Group . If you don’t have a repeater nearby, then you will need a “hoptspot”.

BridgeCom Systems has a variety of videos that will help you get started. They also sell DMR Rigs and hotspots, and even offer some “plug-n-play” kits that they will setup for you, but those are expensive. HRO also sells the rigs and more “do it yourself” hotspot kits.


Hope this helps get you started!


73 de Mike, N0SO

On Jun 16, 2020, at 8:29 AM, Wayne Dillon <wayne.dillon@...> wrote:


Good morning all,
What are you all using to get on the Wednesday DMR net? I'm looking to maybe join in but have no clue as to what to use. Help please.
72/3 de Wayne - NQ0RP


DMR - A quick quesion

Wayne Dillon
 

Good morning all,
What are you all using to get on the Wednesday DMR net? I'm looking to maybe join in but have no clue as to what to use. Help please.
72/3 de Wayne - NQ0RP

--
 
QRP -  EFFICIENCY AND SKILL, NOT POWER. 
 
God Bless from Wayne Dillon - NQ0RP

Fate whispered to courageous "You cannot withstand the storm"
Courageous  whispered back "I am the storm"


Upcoming Event: Wednesday Evening 40 and 80 meter Nets - Wed, 06/17/2020 20:00-21:00 #cal-reminder

main@4SQRP.groups.io Calendar <main@...>
 

Reminder: Wednesday Evening 40 and 80 meter Nets

When: Wednesday, 17 June 2020, 20:00 to 21:00, (GMT-05:00) America/Chicago

Where:40 and 80 Meters

View Event

Organizer: jomatlock@...

Description: The 40 Meter Net will be at 8:00 pm central time  on 7.122 +-. QRM
NCS is WQ5RP/ACØBQ 

Wednesday evening 80 Meter CW Net. will be at  (8:30PM Central Time Wednesday). 



The 80 meter net will be called on 3.564 MHz +/- QRM.
Net control operator is Johnny ACØBQ 

* NEW *  Wednesday evening DMR Voice Net will be at (Thursday) 0300 UTC (9:00PM Central Time Wednesday/)
Four States QRP has a Brandmeister DMR Talk Group (TG31654). Join us to discuss QRP, ask questions, or just ragchew. The Wednesday net is a directed net  but any other time you may use the Talk Group to chat with other QRPers.
Net Control operator is Bert NØYJ.


NAQCC QRPp Sprint

Larry Makoski
 

DATE:  JUNE 17, 2020  (The evening of the 16th in North America.)

TIME:  0030-0230 UTC

BANDS:  80, 40, 20 (See the General Instructions page for suggested freq.)

====================

mW QRPp SPRINT RULES:

All QSOs are to made with 1-watt of output power or less.

Complete sprint rules including exchange details, operating categories,
scoring, and logging requirements should be reviewed at
<http://www.naqcc.info/sprint_rules.html>
http://www.naqcc.info/sprint_rules.html.

====================

MEMBERSHIP DATA FILES:

Membership data files for supported sprint logging applications are
available at  <http://www.naqcc.info/contests.html>
http://www.naqcc.info/contests.html.  It is very important that you use the
latest data file in your software.  It is available now for download.

====================

LOG SUBMISSIONS:

All sprint logs must be submitted through our Autologger page at
http://www.naqcc.info/autologger.php.  Directly emailed logs are no longer
accepted.  Some significant updates have been made to this page, including
some automatic error trapping and correcting.  Please carefully follow the
instructions given on the page for each of the input fields.  (A sample
Autologger page for you to practice on before the start of the sprint is
available.  See the list of useful links below.)

Logging options and specific log formatting details can be found on the
Sprint Rules page at  <http://www.naqcc.info/sprint_rules.html>
http://www.naqcc.info/sprint_rules.html.

====================

AN INTRODUCTION TO OUR NAQCC SPRINTS:

If you have been hesitant to give ham radio contesting a try you really
should consider our NAQCC sprints.  Our sprints are specifically tailored to
help new CW operators get their first contesting experience.  Our most
popular operating category is for using a straight key and this
automatically keeps the CW speeds relatively low.  Additionally the exchange
is simple and virtually everyone operating in the sprint is more than
willing to slow down or give repeats.  Once the sprint is over we make log
submission easy with our automated Autologger page.

Although scores are posted on our website and award certificates are issued,
the real goal of our sprints is not to win something.  It's to have FUN
while promoting CW QRP operating.  EVERYONE who participates in the sprint
is a WINNER, and in keeping with this philosophy we have a drawing each
month for a nice prize that all of our member participants are entered into.
It doesn't matter if you made 1 QSO or 100 QSOs, everyone has a chance to
win the prize.


Re: The mysteries of tuning a random wire

Jim, N5IB
 

Hi again Dave,

Look and see if the Nano has an option to display the reactive part as ohms instead of capacitor/inductor units.
That'll make it much easier to interpret.

For example - in your 30 m measurements.... at 10 MHz, 402 nH is +25 ohms, while 572 pF is -27 ohms. So your 30 m results show that you are actually very close to one of those zero crossings. The change in counterpoise just shifts the zero crossing a little bit either way. That's not as apparent with nH and pF.

N5IB


Re: The mysteries of tuning a random wire

Dave W0DCX
 

I just read Jim's latest post.  Very nice.  I have not yet done a full sweep, but I did try characterizing this so-called antenna for a few bands.  I think the results are consistent with what I originally posted.  But I have to admit this test in probably flawed, for example I don't think my two counterpoises are fully and fairly comparable as they are each positioned differently.  But anyway, I did the work so here are the results.  One of the most marked features is that on 30 meters (the band that behaves the best) the reactive component X is inductive with the 17' cp but capacitive with the 29' cp!  All other reactances are always capacitive.  So 30 meters seems not to care too much either way, it tunes fine with my KX2.  Also, things seem to go south on 20 meters with a longer cp in terms of SWR.  Sorry about the piecemeal telling of this sordid tale.  I will do the full sweep as Jim suggested and see what happens.  I am still learning the ins and outs of the VNA.  Table is included as both a screenshot and a Word.doc attachment.
Dave W0DCX


Re: Want to have some fun?

Michael McEwen
 

This sounds like a great idea. I'll try to get my mobile station set up on the patio.
72/73, Doc K5OSA


Want to have some fun?

Dr Jim Kennedy
 

How about this for a thought. ARRL Field Day is coming up in a few weekends. There will be a lot of CW operators working from home. Many will have limited experience with CW and will have licenses from Novice through Extra. Why not make a plan to work that contest strictly on the Novice frequencies. In that way many OPs will be able to numerous contacts, have a little fun, log some new states or counties or grid squares, help out Novices (the somewhat forgotten class of amateurs), and improve your (not that you need to) CW sending and receiving skills under contest conditions.

Wha-do-yaa-say?

You will find me on the Novice bands.
--
--
*72/73, Doc - K2PHD*
OOTC-FISTS-SKCC-NAQCC-4SQRP
OEM/RACES/ARES/CERT/SKYWARN
K2PHD@...
FN20qv
--------------------------


--
*72/73, Doc - K2PHD
OOTC#4697 - SKCC#5669 - NAQCC#9194 - FISTS#18988
OEM/RACES/ARES/CERT/SKYWARN
K2PHD@...
FN20qv*


Re: The mysteries of tuning a random wire

Jim, N5IB
 

Now, no one ever made a QSO with a computer model of an antenna, but software like 4NEC2 can be useful to gain some insights.

Here's an attached simulated sweep from 80m to 10m of Dave's 72 ft wire. The model assumed:
72 ft long, 2mm diameter copper wire, sloping from 3 ft to 35 ft
17 ft counterpoise, same wire, sloping down from 3 ft to 1.5 ft
counterpoise in the same plane as, and in same direction as, the long wire
average ground conditions

Notice how the reactive part (red curve and axis scale) swings both inductive (+) and capacitive (-) with frequency. Notice also the reactance zero crossings (resonances) where the resistive part (blue curve and axis) is either at a peak, or an some intermediate value between the peaks.

The resonances where the resistive part is at a peak represent frequencies where the wire is behaving as an end-fed multiple of a half wave wire. The other resonances correspond to frequencies where the behavior is that of an **odd** multiple of a quarter wave, end-fed, and generally easier to match.

BTW --- 4NEC2 will calculate the L and C values of a matching network - Tee, Pi, or L (high or low-pass configuration) that will match a given feedpoint.

Dave, when you get a chance to do a sweep with your Nano, we'll all be curious as to whether the general appearance of your sweep is at all similar to this simulation.

N5IB


Send in your score

John Lonigro
 

Everyone should know by now they need to submit their Second Sunday Sprint score by tomorrow at the latest (qrpcontest.com/4sqrp).  As usual, I'll tally the results tomorrow night and publish them Wednesday morning (assuming I don't forget-hi).

72,
John, AA0VE
4SQRP Contest Coordinator


Re: The mysteries of tuning a random wire

W4OED
 

As you know, long-wire antennas have a large inductive component. Some antenna couplers do not have the capacity to deal with such inductance and they rely on the operator to install the antenna coupler close to the radio. This way, the feedline should help it to deal with the extra inductance.
That is why antenna tuners for HF ship radios insert a capacitor in series after the tuning network when dealing with long-wire antennas. It is important to mention that such antenna tuners are always installed within three to six feet from the base of the antenna to avoid dealing with the feedline.
Regarding the counterpoise, I have seen great results when the counterpoise (about 1/4 wavelength of the lower transmit frequency) was installed a few inches about the ground, in line with the radiator, but OPPOSITE to it. This way, the counterpoise acts more as the other half of a dipole. It might be worth trying it.