[Alexandria Radio Club Reflector] FW: DIY for Near Vertical Incident Skywaves (NVIS) Antennas Presentation
R C
clancy.bob at gmail.com
Sat Sep 9 12:35:52 EDT 2023
Yep, I missed y’all. I’m sorry that I was too busy to communicate. It was
important that I put my job ahead of everything else for the past 6 weeks.
I’m pretty sure the linked-dipole will work well with my QRP radios. I’ll
try and connect with you all sometime soon.
Bob KQ4ILQ
On Sat, Sep 9, 2023 at 12:02 PM R C <clancy.bob at gmail.com> wrote:
> I noticed a flat tire once I started driving. I just had the front tires
> replaced and I’m on my way. If I’m too late, I will understand.
>
> Bob KQ4ILQ
>
> On Sat, Sep 9, 2023 at 10:46 AM R C <clancy.bob at gmail.com> wrote:
>
>> I will stop by. I have been busy with work but I have a linked dipole
>> built for NVIS if we have time to test it. I will arrive at the park around
>> 11:30 AM today.
>>
>> Bob KQ4ILQ
>>
>> On Fri, Sep 8, 2023 at 11:48 PM <don.ki4d at gmail.com> wrote:
>>
>>> The NVIS antenna testing will take place on Saturday, September 9th at
>>> Jefferson Manor Park, see link below for location. On-air WSPR work will
>>> start at 9:00 a.m., but antenna installations will start as early as 7:30
>>> a.m. Mainly because of work and family obligations of key participants,
>>> scheduling this event has been very challenging.
>>>
>>> On-air WSPR transmissions will take place on 40 meters at 7.0386 MHz
>>> using 5 NVIS antennas, sequentially. We will be looking to map transmitted
>>> WSPR signals across the state of Virginia to compile the results for
>>> analysis of antenna performances. See attachment for methodology.
>>>
>>> Everyone is welcome.
>>>
>>> Jefferson Manor Park is located here:
>>> https://www.google.com/maps/place/Jefferson+Manor+Park/@38.792307,-77.0852828,17z/data=!3m1!4b1!4m6!3m5!1s0x89b7b19430050a15:0xe191f9094e00c427!8m2!3d38.792307!4d-77.0827079!16s%2Fg%2F1tdpsk3g?entry=ttu
>>>
>>> 73
>>>
>>> Don, KI4D
>>>
>>>
>>>
>>>
>>>
>>> *From:* Todd Taylor <todd.taylor83 at gmail.com>
>>> *Sent:* Sunday, August 6, 2023 10:41 AM
>>> *To:* R C <clancy.bob at gmail.com>
>>> *Cc:* Alex Lammers <alexlammers161 at gmail.com>; Andrew Davnie-Easton <
>>> ki4thf at gmail.com>; Bjorn Jernudd <jernudd at gmail.com>; Don (KI4D) <
>>> don.ki4d at gmail.com>; Ed Ferguson <ed at edsfx.com>; Gary Sessums <
>>> gary at sessums.org>; James Stone <jbstonecfi at yahoo.com>; James Wilson <
>>> telegraphjim at gmail.com>; Joe Porcelli <porcej at gmail.com>; Matthew
>>> Johnson <Mjohnson at paradigmcos.com>; Ryan Stinebiser <
>>> ryan.stinebiser at gmail.com>; scott mcclung <scott.mcclung.308 at gmail.com>;
>>> walkerl <walkerl at mindspring.com>
>>> *Subject:* Re: DIY for Near Vertical Incident Skywaves (NVIS) Antennas
>>> Presentation
>>>
>>>
>>>
>>> W4EDF -7dB into KO4IJH at FM18kt.
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> On Sun, Aug 6, 2023 at 08:24 R C <clancy.bob at gmail.com> wrote:
>>>
>>> I wasn’t able to make progress yesterday with the EFHW. I hope you
>>> otherwise have a productive morning at the park.
>>>
>>>
>>>
>>> Bob
>>>
>>>
>>>
>>> On Sun, Aug 6, 2023 at 8:10 AM Ryan Stinebiser <
>>> ryan.stinebiser at gmail.com> wrote:
>>>
>>> I'm at the park. I see Don's truck, but no Don.
>>>
>>>
>>>
>>> On Sun, Aug 6, 2023, 6:57 AM Todd Taylor <todd.taylor83 at gmail.com>
>>> wrote:
>>>
>>> I won’t be able to join, but if you all are planning to use WSPR I can
>>> set up my station to act as spotter.
>>>
>>>
>>>
>>> On Sat, Aug 5, 2023 at 13:19 <don.ki4d at gmail.com> wrote:
>>>
>>> OK, 8:00 a.m. it is.
>>>
>>>
>>>
>>> 73
>>>
>>> Don
>>>
>>>
>>>
>>> *From:* Ed Ferguson <ed at edsfx.com>
>>> *Sent:* Saturday, August 5, 2023 12:54 PM
>>> *To:* don.ki4d at gmail.com; 'R C' <clancy.bob at gmail.com>
>>> *Cc:* 'Alex Lammers' <alexlammers161 at gmail.com>; 'Andrew Davnie-Easton'
>>> <ki4thf at gmail.com>; 'Bjorn Jernudd' <jernudd at gmail.com>; 'Gary Sessums'
>>> <gary at sessums.org>; 'James Stone' <jbstonecfi at yahoo.com>; 'James
>>> Wilson' <telegraphjim at gmail.com>; 'Joe Porcelli' <porcej at gmail.com>;
>>> 'Matthew Johnson' <Mjohnson at paradigmcos.com>; 'Ryan Stinebiser' <
>>> ryan.stinebiser at gmail.com>; 'Todd Taylor' <todd.taylor83 at gmail.com>;
>>> 'scott mcclung' <scott.mcclung.308 at gmail.com>; 'walkerl' <
>>> walkerl at mindspring.com>
>>> *Subject:* Re: DIY for Near Vertical Incident Skywaves (NVIS) Antennas
>>> Presentation
>>>
>>>
>>>
>>> I will be able to be there at 8am tomorrow. I have an inverted V on 40
>>> I want to see how effective it is as NVIS. I might also take advantage of
>>> the open space to check my new vertical build.
>>>
>>> Ed, W4EDF
>>>
>>> On 8/4/23 23:17, don.ki4d at gmail.com wrote:
>>>
>>> Jefferson Manor Park is located here:
>>> https://www.google.com/maps/place/Jefferson+Manor+Park/@38.792307,-77.0852828,17z/data=!3m1!4b1!4m6!3m5!1s0x89b7b19430050a15:0xe191f9094e00c427!8m2!3d38.792307!4d-77.0827079!16s%2Fg%2F1tdpsk3g?entry=ttu
>>>
>>> 73
>>>
>>> Don, KI4D
>>>
>>>
>>>
>>> *From:* R C <clancy.bob at gmail.com> <clancy.bob at gmail.com>
>>> *Sent:* Friday, August 4, 2023 4:03 PM
>>> *To:* don.ki4d at gmail.com
>>> *Cc:* Alex Lammers <alexlammers161 at gmail.com> <alexlammers161 at gmail.com>;
>>> Andrew Davnie-Easton <ki4thf at gmail.com> <ki4thf at gmail.com>; Bjorn
>>> Jernudd <jernudd at gmail.com> <jernudd at gmail.com>; Ed Ferguson
>>> <ed at edsfx.com> <ed at edsfx.com>; Gary Sessums <gary at sessums.org>
>>> <gary at sessums.org>; James Stone <jbstonecfi at yahoo.com>
>>> <jbstonecfi at yahoo.com>; James Wilson <telegraphjim at gmail.com>
>>> <telegraphjim at gmail.com>; Joe Porcelli <porcej at gmail.com>
>>> <porcej at gmail.com>; Matthew Johnson <Mjohnson at paradigmcos.com>
>>> <Mjohnson at paradigmcos.com>; Ryan Stinebiser <ryan.stinebiser at gmail.com>
>>> <ryan.stinebiser at gmail.com>; Todd Taylor <todd.taylor83 at gmail.com>
>>> <todd.taylor83 at gmail.com>; scott mcclung <scott.mcclung.308 at gmail.com>
>>> <scott.mcclung.308 at gmail.com>; walkerl <walkerl at mindspring.com>
>>> <walkerl at mindspring.com>
>>> *Subject:* Re: DIY for Near Vertical Incident Skywaves (NVIS) Antennas
>>> Presentation
>>>
>>>
>>>
>>> I’m not good at searching through past emails on my phone. Where is the
>>> park?
>>>
>>>
>>>
>>> Thanks
>>>
>>>
>>>
>>> On Fri, Aug 4, 2023 at 3:34 PM <don.ki4d at gmail.com> wrote:
>>>
>>> At the park, earlier is better to get ahead of any reservations. 8:30
>>> a.m. would be the latest recommended time.
>>>
>>>
>>>
>>> 73
>>>
>>> Don
>>>
>>>
>>>
>>> *From:* R C <clancy.bob at gmail.com>
>>> *Sent:* Friday, August 4, 2023 3:31 PM
>>> *To:* don.ki4d at gmail.com
>>> *Cc:* Alex Lammers <alexlammers161 at gmail.com>; Andrew Davnie-Easton <
>>> ki4thf at gmail.com>; Bjorn Jernudd <jernudd at gmail.com>; Ed Ferguson <
>>> ed at edsfx.com>; Gary Sessums <gary at sessums.org>; James Stone <
>>> jbstonecfi at yahoo.com>; James Wilson <telegraphjim at gmail.com>; Joe
>>> Porcelli <porcej at gmail.com>; Matthew Johnson <Mjohnson at paradigmcos.com>;
>>> Ryan Stinebiser <ryan.stinebiser at gmail.com>; Todd Taylor <
>>> todd.taylor83 at gmail.com>; scott mcclung <scott.mcclung.308 at gmail.com>;
>>> walkerl <walkerl at mindspring.com>
>>> *Subject:* Re: DIY for Near Vertical Incident Skywaves (NVIS) Antennas
>>> Presentation
>>>
>>>
>>>
>>> I will finish building my EFHW tomorrow. Sunday is my church’s feast
>>> day (Holy Transfiguration) so I probably won’t be available on Sunday
>>> morning (unless early). The linked NVIS dipole that is being built for me
>>> is probably 3/4 weeks out still.
>>>
>>>
>>>
>>> KQ4ILQ Bob
>>>
>>>
>>>
>>> On Fri, Aug 4, 2023 at 3:23 PM <don.ki4d at gmail.com> wrote:
>>>
>>> Todd – well … perhaps we can break-up the taskings. Since your antenna
>>> is tied to your vehicle in the parking lot, if we can get the other
>>> builders/owners to meet on this Sunday to do placement, sizing and
>>> installation planning for their antennas, we could talk about the WSPR
>>> emitters, methodologies and procedures at the next meeting Ham workshop.
>>>
>>>
>>>
>>> What are your thoughts?
>>>
>>>
>>>
>>> 73
>>>
>>> Don
>>>
>>>
>>>
>>>
>>>
>>> *From:* Todd Taylor <todd.taylor83 at gmail.com>
>>> *Sent:* Friday, August 4, 2023 2:12 PM
>>> *To:* Ryan Stinebiser <ryan.stinebiser at gmail.com>
>>> *Cc:* Don (KI4D) <don.ki4d at gmail.com>; Alex Lammers <
>>> alexlammers161 at gmail.com>; R C <clancy.bob at gmail.com>; Andrew
>>> Davnie-Easton <ki4thf at gmail.com>; Bjorn Jernudd <jernudd at gmail.com>; Ed
>>> Ferguson <ed at edsfx.com>; Gary Sessums <gary at sessums.org>; James Stone <
>>> jbstonecfi at yahoo.com>; James Wilson <telegraphjim at gmail.com>; Joe
>>> Porcelli <porcej at gmail.com>; Matthew Johnson <Mjohnson at paradigmcos.com>;
>>> scott mcclung <scott.mcclung.308 at gmail.com>; walkerl <
>>> walkerl at mindspring.com>
>>> *Subject:* Re: DIY for Near Vertical Incident Skywaves (NVIS) Antennas
>>> Presentation
>>>
>>>
>>>
>>> Don,
>>>
>>> I'm not sure about this Sunday, as I have some competing priorities this
>>> weekend. I definitely cannot do August 23rd, which is a Wednesday. Did you
>>> mean Sunday the 20th?
>>>
>>>
>>>
>>> I am attaching my rough draft protocol for testing. Everyone please have
>>> a look and offer any suggestions you may have.
>>>
>>>
>>>
>>> thanks and 73m
>>>
>>> Todd
>>>
>>> KO4IJH
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> On Fri, Aug 4, 2023 at 12:44 PM Ryan Stinebiser <
>>> ryan.stinebiser at gmail.com> wrote:
>>>
>>> Don,
>>>
>>>
>>>
>>> I should be available on 6 August. I still have not tuned the antenna I
>>> built so I'll bring that with me and set it up and trim it on site.
>>>
>>>
>>>
>>> 73, Ryan, KO4EBY
>>>
>>>
>>>
>>> On Fri, Aug 4, 2023, 12:27 PM <don.ki4d at gmail.com> wrote:
>>>
>>> Looks like we don’t have problems with the 23 August date, perhaps we
>>> can do the actual testing and evaluations on that date. Given the
>>> possibility that the antenna builders/owners may not be going to
>>> Berryville, can we get together on Sunday morning, 6 August, for the site
>>> survey and planning?
>>>
>>>
>>>
>>> The following is what we would need to accomplish this Sunday:
>>>
>>> 1. Identify with certainty which antennas are to be tested
>>> 2. Ascertain how and where antennas will be installed on site ( in
>>> full detail)
>>> 3. Clarify the emitters/frequencies/power that will be used
>>> 4. Clarify the methodology and procedures for proceeding from one
>>> antenna use to another.
>>> 5. Clarify methodology and procedures for collection and correlation
>>> of data
>>> 6. Identify any potential gaps or problem areas.
>>>
>>>
>>>
>>> I would like to hear primarily from the antenna builders/owners for
>>> confirmation, if that is possible.
>>>
>>>
>>>
>>> 73
>>>
>>> Don
>>>
>>>
>>>
>>> *From:* don.ki4d at gmail.com <don.ki4d at gmail.com>
>>> *Sent:* Thursday, July 27, 2023 10:31 AM
>>> *To:* 'Alex Lammers' <alexlammers161 at gmail.com>; 'R C' <
>>> clancy.bob at gmail.com>; 'Andrew Davnie-Easton' <ki4thf at gmail.com>;
>>> 'Bjorn Jernudd' <jernudd at gmail.com>; 'Ed Ferguson' <ed at edsfx.com>;
>>> 'Gary Sessums' <gary at sessums.org>; 'James Stone' <jbstonecfi at yahoo.com>;
>>> 'James Wilson' <telegraphjim at gmail.com>; 'Joe Porcelli' <
>>> porcej at gmail.com>; 'Matthew Johnson' <Mjohnson at paradigmcos.com>; 'Ryan
>>> Stinebiser' <ryan.stinebiser at gmail.com>; 'Todd Taylor' <
>>> todd.taylor83 at gmail.com>; 'scott mcclung' <scott.mcclung.308 at gmail.com>;
>>> 'walkerl' <walkerl at mindspring.com>
>>> *Subject:* RE: DIY for Near Vertical Incident Skywaves (NVIS) Antennas
>>> Presentation
>>>
>>>
>>>
>>> Anyone have a problem with 23 August?
>>>
>>>
>>>
>>> 73
>>>
>>> Don, KI4D
>>>
>>>
>>>
>>> *From:* Alex Lammers <alexlammers161 at gmail.com>
>>> *Sent:* Thursday, July 27, 2023 10:19 AM
>>> *To:* R C <clancy.bob at gmail.com>
>>> *Cc:* Don (KI4D) <don.ki4d at gmail.com>; Andrew Davnie-Easton <
>>> ki4thf at gmail.com>; Bjorn Jernudd <jernudd at gmail.com>; Ed Ferguson <
>>> ed at edsfx.com>; Gary Sessums <gary at sessums.org>; James Stone <
>>> jbstonecfi at yahoo.com>; James Wilson <telegraphjim at gmail.com>; Joe
>>> Porcelli <porcej at gmail.com>; Matthew Johnson <Mjohnson at paradigmcos.com>;
>>> Ryan Stinebiser <ryan.stinebiser at gmail.com>; Todd Taylor <
>>> todd.taylor83 at gmail.com>; scott mcclung <scott.mcclung.308 at gmail.com>;
>>> walkerl <walkerl at mindspring.com>
>>> *Subject:* Re: DIY for Near Vertical Incident Skywaves (NVIS) Antennas
>>> Presentation
>>>
>>>
>>>
>>> Unable, I have a conference that weekend.
>>>
>>>
>>>
>>> KO4ZMC
>>>
>>>
>>>
>>> On Thu, Jul 27, 2023, 8:46 AM R C <clancy.bob at gmail.com> wrote:
>>>
>>> I should be able to attend. I have a better soldering iron I still need
>>> to finish building the EFHW. I ordered a linked-dipole to be built
>>> according to The Tech Prepper’s specs for use as an NVIS antenna. The 80m
>>> segment of the linked-dipole will need to be trimmed. It may or may not be
>>> built and delivered to me by August 13th. The EFHW also still needs to be
>>> tuned.
>>>
>>>
>>>
>>> KQ4ILQ Bob Clancy
>>>
>>>
>>>
>>> On Thu, Jul 27, 2023 at 8:32 AM <don.ki4d at gmail.com> wrote:
>>>
>>> The Berryville Hamfest scheduled on August 6th. In a chat with Todd,
>>> I learned that he is able to attend a NVIS antenna site survey and planning
>>> session on August 13th. For those who have antennas to be tested,
>>> please confirm that the 13th will work for you. This session is to
>>> help us figure out the best way to setup so we won’t have hiccups or have
>>> that concern the day we are focused on getting the testing done in a timely
>>> fashion.
>>>
>>>
>>>
>>> 73
>>>
>>> Don, KI4D
>>>
>>>
>>>
>>> *From:* don.ki4d at gmail.com <don.ki4d at gmail.com>
>>> *Sent:* Wednesday, July 12, 2023 6:11 AM
>>> *To:* 'Todd Taylor' <todd.taylor83 at gmail.com>
>>> *Cc:* 'Andrew Davnie-Easton' <ki4thf at gmail.com>; 'Alex Lammers' <
>>> alexlammers161 at gmail.com>; 'Ryan Stinebiser' <ryan.stinebiser at gmail.com>;
>>> 'walkerl' <walkerl at mindspring.com>; 'James Wilson' <
>>> telegraphjim at gmail.com>; 'Matthew Johnson' <Mjohnson at paradigmcos.com>;
>>> 'scott mcclung' <scott.mcclung.308 at gmail.com>; 'James Stone' <
>>> jbstonecfi at yahoo.com>; 'Bjorn Jernudd' <jernudd at gmail.com>; 'Joe
>>> Porcelli' <porcej at gmail.com>; 'Ed Ferguson' <ed at edsfx.com>; 'R C' <
>>> clancy.bob at gmail.com>; 'Gary Sessums' <gary at sessums.org>
>>> *Subject:* RE: DIY for Near Vertical Incident Skywaves (NVIS) Antennas
>>> Presentation
>>>
>>>
>>>
>>> Todd – many thanks for volunteering to craft a WSPR testing plan. We
>>> will need that very much for our testing.
>>>
>>>
>>>
>>> Looks like we have August 6, 13, and 23 available for our planned
>>> activities. How does the August 6 date work for the initial site survey,
>>> etc.? Please note that we need confirmation for attendance, particular
>>> from those with antennas to be tested. Thanks for your cooperation.
>>>
>>>
>>>
>>> 73
>>>
>>> Don, KI4D
>>>
>>>
>>>
>>> *From:* Todd Taylor <todd.taylor83 at gmail.com>
>>> *Sent:* Tuesday, July 11, 2023 10:01 AM
>>> *To:* don.ki4d at gmail.com
>>> *Cc:* Andrew Davnie-Easton <ki4thf at gmail.com>; Alex Lammers <
>>> alexlammers161 at gmail.com>; Ryan Stinebiser <ryan.stinebiser at gmail.com>;
>>> walkerl <walkerl at mindspring.com>; James Wilson <telegraphjim at gmail.com>;
>>> Matthew Johnson <Mjohnson at paradigmcos.com>; scott mcclung <
>>> scott.mcclung.308 at gmail.com>; James Stone <jbstonecfi at yahoo.com>; Bjorn
>>> Jernudd <jernudd at gmail.com>; Joe Porcelli <porcej at gmail.com>; Ed
>>> Ferguson <ed at edsfx.com>; R C <clancy.bob at gmail.com>; Gary Sessums <
>>> gary at sessums.org>
>>> *Subject:* Re: DIY for Near Vertical Incident Skywaves (NVIS) Antennas
>>> Presentation
>>>
>>>
>>>
>>> Any weekend but the 26th-27th of August should be ok for me.
>>>
>>>
>>>
>>> I will try to put together a WSPR testing plan to share ASAP. That way
>>> we can all measure our antennas the same way and compare results. Of
>>> course, if anyone has feedback on my proposal or suggestions beforehand, we
>>> can work those in as well. Just let me know.
>>>
>>>
>>>
>>> Additionally, there was a question at the last meeting about NVIS being
>>> covered in the ARRL Antenna Book. If you have a copy, section 14.2.2 (pages
>>> 14.9-16) discusses NVIS in some detail.
>>>
>>>
>>>
>>> On Tue, Jul 11, 2023 at 9:08 AM <don.ki4d at gmail.com> wrote:
>>>
>>> OK, understand; thanks for letting us know. I am thinking that we
>>> should wait until Ryan returns to the Area to reschedule in August. My
>>> sense is that your experience and guidance is critical for the WSPR
>>> gear/software configurations setups we need for the antenna tests. Looking
>>> at the calendar, can you see a Sunday in August for your availability?
>>>
>>>
>>>
>>> 73
>>>
>>> Don, KI4D
>>>
>>>
>>>
>>> *From:* Todd Taylor <todd.taylor83 at gmail.com>
>>> *Sent:* Tuesday, July 11, 2023 8:32 AM
>>> *To:* don.ki4d at gmail.com
>>> *Cc:* Andrew Davnie-Easton <ki4thf at gmail.com>; Alex Lammers <
>>> alexlammers161 at gmail.com>; Ryan Stinebiser <ryan.stinebiser at gmail.com>;
>>> walkerl <walkerl at mindspring.com>; James Wilson <telegraphjim at gmail.com>;
>>> Matthew Johnson <Mjohnson at paradigmcos.com>; scott mcclung <
>>> scott.mcclung.308 at gmail.com>; James Stone <jbstonecfi at yahoo.com>; Bjorn
>>> Jernudd <jernudd at gmail.com>; Joe Porcelli <porcej at gmail.com>; Ed
>>> Ferguson <ed at edsfx.com>; R C <clancy.bob at gmail.com>; Gary Sessums <
>>> gary at sessums.org>
>>> *Subject:* Re: DIY for Near Vertical Incident Skywaves (NVIS) Antennas
>>> Presentation
>>>
>>>
>>>
>>> Don,
>>>
>>>
>>>
>>> I will not be able to attend the walkthrough on Sunday, but please
>>> proceed without me. For my antenna at least, I will only need somewhere to
>>> park the Jeep and approximately 35 ft of space behind it to run the wire. I
>>> will look on Google maps to determine what should work for me.
>>>
>>>
>>>
>>> 73,
>>>
>>> Todd KO4IJH
>>>
>>>
>>>
>>> On Sat, Jul 8, 2023 at 2:10 PM <don.ki4d at gmail.com> wrote:
>>>
>>> All - as a next step for the NVIS Antenna project testing/evaluation, I
>>> am proposing that we meet at Jefferson Manor Park on Sunday, July 16th
>>> at 8:30 a.m., for a site survey. Purpose would be to map out and plan
>>> antenna installation sites, feedlines, radio equipment needs, etc. Once we
>>> have all of this figured out, we can take time to fill-in the gaps and set
>>> a date for execution, maybe Aug 6, weather permitting. Please let me know
>>> if the July 16th is a problem.
>>>
>>>
>>>
>>> After email discussions with Todd and Ryan, I am proposing that we take
>>> their recommendation to use WSPR as the mode of propagation for antenna
>>> testing to get a measure of best regional coverage on the bands of
>>> interest. During Todd’s presentation at the DIY Ham Workshop, he displayed
>>> WSPR propagation patterns for his NVIS antenna.
>>>
>>>
>>>
>>> Please provide any thoughts you may have.
>>>
>>>
>>>
>>> 73
>>>
>>> Don, KI4D
>>>
>>>
>>>
>>> *From:* don.ki4d at gmail.com <don.ki4d at gmail.com>
>>> *Sent:* Saturday, June 10, 2023 7:15 PM
>>> *To:* 'Todd Taylor' <todd.taylor83 at gmail.com>; 'Andrew Davnie-Easton' <
>>> ki4thf at gmail.com>; 'Alex Lammers' <alexlammers161 at gmail.com>; 'Ryan
>>> Stinebiser' <ryan.stinebiser at gmail.com>; 'walkerl' <
>>> walkerl at mindspring.com>; 'James Wilson' <telegraphjim at gmail.com>;
>>> 'Matthew Johnson' <Mjohnson at paradigmcos.com>; 'scott mcclung' <
>>> scott.mcclung.308 at gmail.com>; 'James Stone' <jbstonecfi at yahoo.com>;
>>> 'Bjorn Jernudd' <jernudd at gmail.com>; 'Joe Porcelli' <porcej at gmail.com>;
>>> 'Ed Ferguson' <ed at edsfx.com>; 'R C' <clancy.bob at gmail.com>
>>> *Cc:* 'Gary Sessums' <gary at sessums.org>
>>> *Subject:* DIY for Near Vertical Incident Skywaves (NVIS) Antennas
>>> Presentation
>>>
>>>
>>>
>>> Some references and small edits were made to the presentation last night.
>>>
>>>
>>>
>>> 73
>>>
>>> Don, KI4D
>>>
>>>
>>>
>>> *From:* don.ki4d at gmail.com <don.ki4d at gmail.com>
>>> *Sent:* Friday, June 9, 2023 4:48 PM
>>> *To:* 'Todd Taylor' <todd.taylor83 at gmail.com>; 'Andrew Davnie-Easton' <
>>> ki4thf at gmail.com>; 'Alex Lammers' <alexlammers161 at gmail.com>; 'Ryan
>>> Stinebiser' <ryan.stinebiser at gmail.com>; 'walkerl' <
>>> walkerl at mindspring.com>; 'James Wilson' <telegraphjim at gmail.com>;
>>> 'Matthew Johnson' <Mjohnson at paradigmcos.com>; 'scott mcclung' <
>>> scott.mcclung.308 at gmail.com>; 'James Stone' <jbstonecfi at yahoo.com>;
>>> 'Bjorn Jernudd' <jernudd at gmail.com>; 'Joe Porcelli' <porcej at gmail.com>;
>>> 'Ed Ferguson' <ed at edsfx.com>; 'R C' <clancy.bob at gmail.com>
>>> *Subject:* RE: DIY for NVIS Antennas (DRAFT ppt)
>>>
>>>
>>>
>>> Attached is the final version. Many thanks to all who contributed;
>>> looking forward to a great presentation tonight.
>>>
>>>
>>>
>>> 73
>>>
>>> Don, KI4D
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> *From:* Todd Taylor <todd.taylor83 at gmail.com>
>>> *Sent:* Friday, June 9, 2023 10:32 AM
>>> *To:* don.ki4d at gmail.com
>>> *Cc:* Andrew Davnie-Easton <ki4thf at gmail.com>; Alex Lammers <
>>> alexlammers161 at gmail.com>; Ryan Stinebiser <ryan.stinebiser at gmail.com>;
>>> walkerl <walkerl at mindspring.com>; James Wilson <telegraphjim at gmail.com>;
>>> Matthew Johnson <Mjohnson at paradigmcos.com>; scott mcclung <
>>> scott.mcclung.308 at gmail.com>; James Stone <jbstonecfi at yahoo.com>; Bjorn
>>> Jernudd <jernudd at gmail.com>; Joe Porcelli <porcej at gmail.com>; Ed
>>> Ferguson <ed at edsfx.com>; R C <clancy.bob at gmail.com>
>>> *Subject:* Re: DIY for NVIS Antennas (DRAFT ppt)
>>>
>>>
>>>
>>> Looks great, Don. I'm including some rough testing data on my antenna
>>> utilizing WSPR. I'll bring a printout but feel free to add the chart to the
>>> slides if you like.
>>>
>>> 73,
>>>
>>> Todd
>>>
>>> KO4IJH
>>>
>>>
>>>
>>> On Fri, Jun 9, 2023 at 7:28 AM <don.ki4d at gmail.com> wrote:
>>>
>>> All – attached is the final version for tonight less some very minor
>>> touches. Bob – are we still a go for tonight? Thanks.
>>>
>>>
>>>
>>> 73
>>>
>>> Don, KI4D
>>>
>>>
>>>
>>> *From:* don.ki4d at gmail.com <don.ki4d at gmail.com>
>>> *Sent:* Thursday, June 8, 2023 10:22 AM
>>> *To:* 'Andrew Davnie-Easton' <ki4thf at gmail.com>; 'Alex Lammers' <
>>> alexlammers161 at gmail.com>; 'Ryan Stinebiser' <ryan.stinebiser at gmail.com>;
>>> 'walkerl' <walkerl at mindspring.com>; 'James Wilson' <
>>> telegraphjim at gmail.com>; 'Todd Taylor' <todd.taylor83 at gmail.com>;
>>> 'Matthew Johnson' <Mjohnson at paradigmcos.com>; 'scott mcclung' <
>>> scott.mcclung.308 at gmail.com>; 'James Stone' <jbstonecfi at yahoo.com>;
>>> 'Bjorn Jernudd' <jernudd at gmail.com>; 'Joe Porcelli' <porcej at gmail.com>;
>>> 'Ed Ferguson' <ed at edsfx.com>; 'R C' <clancy.bob at gmail.com>
>>> *Subject:* DIY for NVIS Antennas (DRAFT ppt)
>>>
>>>
>>>
>>> Attached is the proposed presentation for tomorrow’s meeting. Please
>>> confirm the individual presentations and provide any feedback, as
>>> appropriate. I can provide photos for discussions if you don’t have any.
>>> Thanks.
>>>
>>>
>>>
>>> 73
>>>
>>> Don, KI4D
>>>
>>>
>>>
>>> *From:* Don Lewis <don.ki4d at gmail.com>
>>> *Sent:* Thursday, June 1, 2023 10:58 AM
>>> *To:* Andrew Davnie-Easton <ki4thf at gmail.com>
>>> *Cc:* Alex Lammers <alexlammers161 at gmail.com>; Ryan Stinebiser <
>>> ryan.stinebiser at gmail.com>; walkerl <walkerl at mindspring.com>; James
>>> Wilson <telegraphjim at gmail.com>; Todd Taylor <todd.taylor83 at gmail.com>;
>>> Matthew Johnson <Mjohnson at paradigmcos.com>; scott mcclung <
>>> scott.mcclung.308 at gmail.com>; James Stone <jbstonecfi at yahoo.com>; Bjorn
>>> Jernudd <jernudd at gmail.com>; Joe Porcelli <porcej at gmail.com>; Ed
>>> Ferguson <ed at edsfx.com>; R C <clancy.bob at gmail.com>
>>> *Subject:* Re: Welcome to Andy, KI4THF
>>>
>>>
>>>
>>> The NVIS antenna DIY presentation to the club is just over a week away.
>>>
>>>
>>>
>>> As we discussed in the NVIS Zoom meeting, the presentation agenda has
>>> the following main points:
>>>
>>> 1. Project Overview
>>> 2. Overall Group Progress To Date
>>> 3. Individual Antenna Presentations
>>> 4. Future Next Steps
>>> 5. Conclusions
>>>
>>> With 5 to 6 individual antenna presentations, we need to be as complete
>>> as possible concerning each antenna presentation; yet, as brief as possible
>>> to make sure that everyone has a chance to speak. To help this process I am
>>> proposing that each antenna presentation address the following points:
>>>
>>> 1. Chosen Antenna Name/Type
>>> 2. HF bands covered
>>> 3. Portability for carry (shape/size/weight)
>>> 4. Space required for deployment
>>> 5. One person installation (Yes/No)
>>> 6. Installation details for NVIS configuration
>>> 7. DIY project (Yes/No)
>>> 8. DIY Issues/difficulty
>>> 9. Testing result, if any
>>>
>>> The idea is to create a spreadsheet containing these points to later
>>> provide a quick comparison of antennas. Please consider this approach as
>>> work in progress, we can make improvements as we go forward.
>>>
>>>
>>>
>>> Thus far, we need to confirm that we will have the following antenna
>>> presentations:
>>>
>>> Todd - Vehicular antenna
>>>
>>> Alex - AS-2259
>>>
>>> Ryan - Alpha Delta DX-DD hack
>>>
>>> Bob - EFHW (DIY?)
>>>
>>> Don - End Fed Long Wire (kit)
>>>
>>> Andy - Chameleon End Fed antenna ??
>>>
>>>
>>>
>>> If you will send me photos of your antennas, I will make sure they are
>>> shown on the meeting slides so that the Zoom audience can view them during
>>> your antenna discussions.
>>>
>>>
>>>
>>> The plan is that the in-person meeting audience will be able to "touch
>>> and feel" and ask questions about antennas in the room.
>>>
>>>
>>>
>>> Please feel free to comment on this plan with your thoughts and ideas.
>>>
>>>
>>>
>>> 73
>>>
>>> Don, KI4D
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> On Thu, May 25, 2023 at 11:35 PM <don.ki4d at gmail.com> wrote:
>>>
>>> Andy – welcome to the NVIS Antenna Working Group. I was delighted to
>>> learn about your long-ago experiences with NVIS propagation and your recent
>>> purchase of a Chameleon NVIS antenna on the Weekly Net tonight. I hope you
>>> will share your NVIS experiences with us. The working group plans a DIY
>>> presentation to the club on June 9th. This presentation will include
>>> commercially built antennas as well. The main point is to find the best
>>> performing portable NVIS antennas for go-kit recommendations to the club.
>>> If you would like to present your antenna in a brief discussion on June
>>> 9th, please let me know. We are planning a field test and evaluation event
>>> of selected antennas in mid-July. Hope you will want to join us.
>>>
>>>
>>>
>>> 73
>>>
>>> Don, KI4D
>>>
>>>
>>>
>>>
>>>
>>> *From:* don.ki4d at gmail.com <don.ki4d at gmail.com>
>>> *Sent:* Wednesday, May 24, 2023 3:05 PM
>>> *To:* 'Alex Lammers' <alexlammers161 at gmail.com>; 'Ryan Stinebiser' <
>>> ryan.stinebiser at gmail.com>; 'walkerl' <walkerl at mindspring.com>; 'James
>>> Wilson' <telegraphjim at gmail.com>; 'Todd Taylor' <todd.taylor83 at gmail.com>;
>>> 'Matthew Johnson' <Mjohnson at paradigmcos.com>; 'scott mcclung' <
>>> scott.mcclung.308 at gmail.com>; 'James Stone' <jbstonecfi at yahoo.com>;
>>> 'Bjorn Jernudd' <jernudd at gmail.com>; 'Joe Porcelli' <porcej at gmail.com>;
>>> 'Ed Ferguson' <ed at edsfx.com>; 'R C' <clancy.bob at gmail.com>
>>> *Subject:* REMINDER: Proposed Zoom meeting next Wednesday evening, May
>>> 24th, at 7:00 p.m.
>>>
>>>
>>>
>>> The meeting for tonight is a “go,” apologize for the short notice
>>> confirmation. The link for the Zoom meeting is below.
>>>
>>>
>>>
>>> 73
>>>
>>> Don, KI4D
>>>
>>>
>>>
>>> Topic: NVIS Antenna Working Group
>>>
>>> Time: May 24, 2023 07:00 PM Eastern Time (US and Canada)
>>>
>>> Join Zoom Meeting
>>>
>>>
>>> https://us02web.zoom.us/j/86130199992?pwd=WGpPY2dXR1Z4RURJWFVhRW5rUWlBQT09
>>>
>>>
>>>
>>> Meeting ID: 861 3019 9992
>>>
>>> Passcode: 182482
>>>
>>>
>>>
>>>
>>>
>>> *From:* don.ki4d at gmail.com <don.ki4d at gmail.com>
>>> *Sent:* Thursday, May 18, 2023 5:49 PM
>>> *To:* 'Alex Lammers' <alexlammers161 at gmail.com>; 'Ryan Stinebiser' <
>>> ryan.stinebiser at gmail.com>; 'walkerl' <walkerl at mindspring.com>; 'James
>>> Wilson' <telegraphjim at gmail.com>; 'Todd Taylor' <todd.taylor83 at gmail.com>;
>>> 'Matthew Johnson' <Mjohnson at paradigmcos.com>; 'scott mcclung' <
>>> scott.mcclung.308 at gmail.com>; 'James Stone' <jbstonecfi at yahoo.com>;
>>> 'Bjorn Jernudd' <jernudd at gmail.com>; 'Joe Porcelli' <porcej at gmail.com>;
>>> 'Ed Ferguson' <ed at edsfx.com>
>>> *Subject:* Proposed Zoom meeting next Wednesday evening, May 24th, at
>>> 7:00 p.m.
>>>
>>>
>>>
>>> To prepare for the NVIS antenna DIY session meeting on June 9th, I
>>> would like to schedule a Zoom meeting next Wednesday evening, May 24th,
>>> at 7:00 p.m. Pleases advise if this is problematic for you. The main goal
>>> of the meeting is to create an agenda that will provide the order of topics
>>> to be presented and the speakers leading those topics at the June meeting.
>>>
>>>
>>>
>>> I have heard from some people about antenna selections, but not
>>> everyone. For those working on DIY antenna project selections, the goal is
>>> to get a project status update that includes a list of components needed
>>> that someone else may have in excess. This discussion could also let us
>>> know more about who may be helpful in other ways.
>>>
>>>
>>>
>>> As soon as it is clear this meeting is a “go,” I will send a Zoom link.
>>>
>>>
>>>
>>> Tonight, I will be posting all references to a Google Drive for your
>>> convenience. Attached is another reference for a AS-2299 which is not a
>>> resonant antenna.
>>>
>>>
>>>
>>> 7d
>>>
>>> Don, KI4D
>>>
>>>
>>>
>>> *From:* don.ki4d at gmail.com <don.ki4d at gmail.com>
>>> *Sent:* Friday, May 12, 2023 9:09 AM
>>> *To:* 'Alex Lammers' <alexlammers161 at gmail.com>; 'Ryan Stinebiser' <
>>> ryan.stinebiser at gmail.com>
>>> *Cc:* 'walkerl' <walkerl at mindspring.com>; 'James Wilson' <
>>> telegraphjim at gmail.com>; 'Todd Taylor' <todd.taylor83 at gmail.com>;
>>> 'Matthew Johnson' <Mjohnson at paradigmcos.com>; 'scott mcclung' <
>>> scott.mcclung.308 at gmail.com>; 'James Stone' <jbstonecfi at yahoo.com>;
>>> 'Bjorn Jernudd' <jernudd at gmail.com>; 'Joe Porcelli' <porcej at gmail.com>;
>>> 'Ed Ferguson' <ed at edsfx.com>
>>> *Subject:* RE: Welcome to the Workgroup for Construction, and Testing &
>>> Evaluation of DIY NVIS Antennas
>>>
>>>
>>>
>>> Thanks for the contribution, Alex - we may really need your help with
>>> this when it comes to UnUn/Balun boxes or wire winders. Hope to see you at
>>> the meeting tonight.
>>>
>>>
>>>
>>> 73
>>>
>>> Don, KI4D
>>>
>>>
>>>
>>> *From:* Alex Lammers <alexlammers161 at gmail.com>
>>> *Sent:* Friday, May 12, 2023 8:21 AM
>>> *To:* Ryan Stinebiser <ryan.stinebiser at gmail.com>
>>> *Cc:* Don (KI4D) <don.ki4d at gmail.com>; walkerl <walkerl at mindspring.com>;
>>> James Wilson <telegraphjim at gmail.com>; Todd Taylor <
>>> todd.taylor83 at gmail.com>; Matthew Johnson <Mjohnson at paradigmcos.com>;
>>> scott mcclung <scott.mcclung.308 at gmail.com>; James Stone <
>>> jbstonecfi at yahoo.com>; Bjorn Jernudd <jernudd at gmail.com>; Joe Porcelli <
>>> porcej at gmail.com>; Ed Ferguson <ed at edsfx.com>
>>> *Subject:* Re: Welcome to the Workgroup for Construction, and Testing &
>>> Evaluation of DIY NVIS Antennas
>>>
>>>
>>>
>>> Also have a 3D printer, it can do most 3" x 3" by 3" prints with minimal
>>> warping
>>>
>>>
>>>
>>> On Fri, May 12, 2023 at 8:15 AM Ryan Stinebiser <
>>> ryan.stinebiser at gmail.com> wrote:
>>>
>>> Don,
>>>
>>>
>>>
>>> I can provide a better list if sources and instructions to build 49:1
>>> UNUNs, 9:1 UNUNs, and loading coils for the short 80m dipole when I get
>>> back to my home computer.
>>>
>>>
>>>
>>> - Newark usually has good prices on FT240-43 and FT140-43 torroids.
>>> Check Mouser as well. A single FT140-43 can handle 100w SSB with no
>>> problem. If you plan on running high power, use multiple FT240-43s stacked
>>> in your transformer.
>>>
>>>
>>>
>>> - I sourced the 100pF, 10kV rated capacitor for the 49:1 transformer
>>> from Ebay (the blue ones)
>>>
>>>
>>>
>>> - AutomationDirect has good prices on spools of hookup wire, especially
>>> 20 awg. Usually free shipping too.
>>>
>>>
>>>
>>> - Amazon for almost everything else (18 or 14 gauge magnet wire, solid
>>> core wire, ring terminals, etc.)
>>>
>>>
>>>
>>> I have a ton of magnet wire. Probably enough for each of us to make a
>>> transformer.
>>>
>>>
>>>
>>> I recently fixed my 3d printer and can print cases and wire winders for
>>> the group with enough advance notice.
>>>
>>>
>>>
>>> 73, Ryan, KO4EBY
>>>
>>>
>>>
>>> On Fri, May 12, 2023, 12:06 AM <don.ki4d at gmail.com> wrote:
>>>
>>> Thanks to those who have responded with antenna selections. This input
>>> will help steer the direction of the project. The more input we have, the
>>> better outcome we will have; so please continue making contributions.
>>>
>>>
>>>
>>> I want to follow-up with some ideas on how we can proceed and think
>>> about the project. Some may want to actually build DIY antennas from a
>>> list of identified components, some want to build an antenna kit that comes
>>> with components, some may want to demonstrate antennas they have already
>>> built, and some may just want to follow the process to be informed and/or
>>> contribute thoughts here and there. Finally, some may just want
>>> participate in the test and evaluation process. Of course, all of these
>>> approaches are just fine. Listed here are some NVIS antenna possibilities:
>>>
>>>
>>>
>>> 1. For those who want to actually build DIY antennas from a list of
>>> parts, time is becoming critical because DIY-day only a month away. Parts
>>> and component research, ordering process, and shipping could introduce
>>> unexpected delays before construction can began. Ryan may have some ideas
>>> on where to source these items with a quick turn-around.
>>> 2. Those interested in building kits may not face much of a delay
>>> before construction can begin. The ARRL has an EFHW 49:1 UnUn HF kit for
>>> sale
>>> https://home.arrl.org/action/Store/Product-Details/productId/133267,
>>> see attachment . This kit is manufactured by “HF Kits” in the
>>> Netherlands. I recently ordered a Long Wire (Random Length) 9:1 UnUn HF
>>> kit directly from “HF kits <http://www.hfkits.nl/>.” on May 7th,
>>> see attachment. It arrived in Alexandria via UPS on May 10th. The
>>> kit from the Netherlands with shipping was a few dollars cheaper than the
>>> listed price of the kit on the ARRL website.. There is no wire supplied
>>> with either of these kits. KM4ACK
>>> <https://km4ack.square.site/shop/antennas/6?page=1&limit=60&sort_by=popularity_score&sort_order=desc>
>>> also offers portable 49:1 EFHW antenna kits that can be used for NVIS, when
>>> they are in stock.
>>> 3. For the center-fed dipoles and inverted-V antennas “HF kits
>>> <http://www.hfkits.nl/>” offers Baluns for 150W and 800W versions.
>>> Wire lengths are sold with these units depending on the operating bands,
>>> see attachments.
>>> 4. For those interested in the AS-2259, see the modified AS-2259
>>> antenna, attached. This antenna design modifies the military version of
>>> this antenna so that it works in the Ham bands. The antennas require
>>> loading coils as described in the instructions. I have a meter that will
>>> measure the inductances of coils, if needed.
>>> 5. For those interested in using the Buddipole system, there are
>>> three references.
>>> 6. The Hamsticks or Hustler Radiator DIY Dipoles require two
>>> separate antennas designed for specific bands to be used with a special
>>> adapter that connects the two separate antenna systems, see attachments for
>>> the antennas.
>>> 7. A roadside vehicle NVIS antennas design is attached.
>>> 8. The general problem with portable “small” magnetic loops is that
>>> they can’t be designed for 80 meters give the size they require; operation
>>> on the 80-meter band is desirable for nigh-time operations. Please see
>>> attachments for small magnet loop antenna.
>>>
>>> All ideas are invited, please keep them coming.
>>>
>>> 73
>>>
>>> Don, KI4D
>>>
>>>
>>>
>>>
>>>
>>> *From:* don.ki4d at gmail.com <don.ki4d at gmail.com>
>>> *Sent:* Thursday, May 4, 2023 11:37 AM
>>> *To:* 'Ryan Stinebiser' <ryan.stinebiser at gmail.com>; 'walkerl' <
>>> walkerl at mindspring.com>; 'Alex Lammers' <alexlammers161 at gmail.com>;
>>> 'James Wilson' <telegraphjim at gmail.com>; todd.taylor83 at gmail.com;
>>> 'Matthew Johnson' <Mjohnson at paradigmcos.com>; 'scott mcclung' <
>>> scott.mcclung.308 at gmail.com>; 'James Stone' <jbstonecfi at yahoo.com>;
>>> 'Bjorn Jernudd' <jernudd at gmail.com>; 'Joe Porcelli' <porcej at gmail.com>;
>>> 'Ed Ferguson' <ed at edsfx.com>
>>> *Subject:* Welcome to the Workgroup for Construction, and Testing &
>>> Evaluation of DIY NVIS Antennas
>>>
>>>
>>>
>>> This note is to welcome participants of this group and to open
>>> discussions on portable antennas that may be most suitable for NVIS
>>> propagation.
>>>
>>>
>>>
>>> This includes considerations of space restraints or other limitations.
>>> Discussions will include planning and scheduling testing and evaluation of
>>> antennas as a basis for selection of the best NVIS antennas for inclusion
>>> in EMCOMM go-kits, POTA activities, and participation in Virginia QSO
>>> Parties.
>>>
>>>
>>>
>>> Please add your thoughts and comments at any time, they are most
>>> important to success of the project.
>>>
>>>
>>>
>>> Some antennas DIY projects for considerations are:
>>>
>>> 1). DIY Center-fed Dipole, and a loading coil shortened version
>>>
>>> 2). DIY End-fed Dipole, and a loading coil shortened version
>>>
>>> 3). DIY Center-fed Inverted V, and a loading coil shortened version
>>>
>>> 4). DIY End-fed Inverted V, and a loading coil shortened version
>>>
>>> 5). DIY AS-2259, and a loading coil shortened version
>>>
>>> 6). DIY Random Length Wire Antennas
>>>
>>> 7). DIY Vehicular counterpoise NVIS antennas
>>>
>>> 8). Buddipole NVIS DIY Configuration
>>>
>>> 9). Hamsticks/Hustler Radiator DIY Dipoles
>>>
>>> 10). Small Loop DIY antennas
>>>
>>>
>>>
>>> Since parts and components may need to be sourced and ordered for the
>>> DIY antenna construction session, it would be good if each person could
>>> select two or three antenna types of their choice so that, if desirable, we
>>> can combine them to get group rates for ordering parts. If additional
>>> amplification or details are needed about any antenna listed or on any
>>> aspect of the project, please send me a note or post a note to the group.
>>> To keep the project on schedule, please make your antenna selections known
>>> by May 11th. Those selected antennas will be featured during the DIY
>>> presentation.
>>>
>>>
>>>
>>> Depending on antenna selections, we will be able to focus best on
>>> aspects of the project that may require the most DIY components and efforts
>>> such as toroids and capacitors needed, matching unit construction and
>>> mounting techniques, loading coil construction techniques, etc.
>>>
>>>
>>>
>>> Forwarded with this email is Ed’s (W4EDF) email with a link to his
>>> YouTube video on a center-fed NVIS antenna. Also attached are other
>>> references for discussions that may take place in the future, and will be
>>> included in the listing of references used for the project. Information on
>>> commercial products is included only for gaining DIY know-how.
>>>
>>>
>>>
>>> As you know, Ryans presentation on his NVIS experiences during the
>>> Virginia QSO Party is schedule for the next meeting on May 12th.
>>>
>>>
>>>
>>> 73
>>>
>>> Don, KI4D
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> *From:* Ed Ferguson <ed at edsfx.com>
>>> *Sent:* Wednesday, April 26, 2023 9:49 AM
>>> *To:* don.ki4d at gmail.com
>>> *Subject:* Re: [ARC Members Only] Opportunity for Construction, and
>>> Testing & Evaluation of DIY NVIS Antennas
>>>
>>>
>>>
>>> Don, for some reason, I'm not able to reply to this chain but wanted to
>>> share the video of the dipole center I built that can be used for nvis
>>>
>>> https://www.youtube.com/watch?v=Z-cUNs274rU
>>>
>>>
>>>
>>> 73, W4EDF
>>>
>>>
>>>
>>>
>>>
>>> On 4/24/23 23:52, don.ki4d at gmail.com wrote:
>>>
>>> This is to announce an opportunity for those interested in learning
>>> about antennas from “hands-on” HF antenna construction, and testing and
>>> evaluation. Antennas are one of the few things in amateur radio that hams
>>> have control over, depending on where they live. Compared to many years
>>> ago when hams commonly built their own transmitters and receivers, there
>>> are few “hands-on” equipment construction opportunities today. Moreover,
>>> good antennas can be more important to a ham radio station than the type of
>>> radio equipment to communications.
>>>
>>>
>>>
>>> At the last club meeting, I gave a presentation on “Beyond Line of Sight
>>> (LOS) with NVIS (Near Vertical Incident Skywave)” propagation, see attached
>>> presentation. The presentation was the first of three planned
>>> presentations covering NVIS to be held during the Ham Workshop segment of
>>> meetings, see presentation blocks attached. The purpose of these
>>> presentations is to enhance understanding of HF antennas and to improve
>>> capabilities of club members to respond to disasters or emergencies using
>>> their ham radio skills. During national disasters in the past, whether
>>> natural or man-made, widespread power outages and telecommunications
>>> outages have become realities. Ham radio has led the way in helping
>>> communities to restore communications after disasters. Hurricane Katrina
>>> and other extreme storm events are examples. Somewhat surprisingly, there
>>> have been recent reports of intentional attacks on power transmission
>>> facilities that caused widespread power and communications outages.
>>>
>>>
>>>
>>> The DIY antenna construction session is currently scheduled for June 9th.
>>> During the DIY antenna construction session, antenna construction
>>> techniques will be presented on candidate HF antennas for portable NVIS
>>> operations. Demonstrations will consist of construction of simple dipoles,
>>> endfed halfwave (EFHW) dipoles; and random length endfed wire, inverted
>>> “V”, and AS-2259 antennas. Also demonstrated will be Buddipole “NVIS”
>>> antennas and “ham stick” NVIS antennas, as well as others. Leading up to
>>> the session, club members will be encouraged to bring in their portable
>>> NVIS antennas for discussions and questions. On-going discussions will
>>> include “how-to” source antenna parts and components and “how-to”
>>> techniques for construction of HF antennas and installation.
>>>
>>>
>>>
>>> For this project, we would like to form a working group that will
>>> develop testing plans and schedules for field test events that will permit
>>> testing and evaluation of different portable NVIS antenna designs and
>>> configurations under different conditions always seeking optimum results.
>>> The results could prove helpful in making recommendations for portable NVIS
>>> antennas for go-kits.
>>>
>>>
>>>
>>> Ryan Stinebiser, KO4EBY, and I will conduct these sessions. Please send
>>> me an email to let us know if you would like to participate in this project
>>> on the working group. We would like to get started as soon as possible.
>>> See link below on some of the files we have discussed. Soon they will be
>>> better organized.
>>>
>>> 73
>>>
>>> Don, KI4D
>>>
>>>
>>>
>>>
>>> https://drive.google.com/drive/folders/1Y7d-rlSkIk5WPcRlt_TvsFUsyEx6j2A8?usp=share_link
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> --
>>> You received this message because you are subscribed to the Google
>>> Groups "Alexandria Radio Club Current Membership" group.
>>> To unsubscribe from this group and stop receiving emails from it, send
>>> an email to
>>> alexandria-radio-club-current-membership+unsubscribe at googlegroups.com.
>>> To view this discussion on the web visit
>>> https://groups.google.com/d/msgid/alexandria-radio-club-current-membership/03f901d97729%2464a3c840%242deb58c0%24%40gmail.com
>>> <https://groups.google.com/d/msgid/alexandria-radio-club-current-membership/03f901d97729%2464a3c840%242deb58c0%24%40gmail.com?utm_medium=email&utm_source=footer>
>>> .
>>>
>>> --
>>>
>>> Bob Clancy
>>>
>>> --
>>>
>>> Bob Clancy
>>>
>>> --
>>>
>>> Bob Clancy
>>>
>>> --
>>>
>>> Bob Clancy
>>>
>>>
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