Date   

Re: Rowlands reflector question

Paul Zoba
 

90 foot tower.


On Apr 5, 2020, at 6:07 PM, Jackson Beard <macleanofduart@...> wrote:


Nope.

On Sun, Apr 5, 2020, 17:59 Rowland <rowland.brasch@...> wrote:
Do you have any neighborhood restrictions

On Sun, Apr 5, 2020 at 5:10 PM Jackson Beard <macleanofduart@...> wrote:
Since everyone is offering antenna advice, I have a perfect condition kenwood hf radio I should use this time to get working. 

What's the easiest antenna to get put u pl in short order?

On Sun, Apr 5, 2020, 17:06 Howard E. Mahran / WA1HEM <wa1hem@...> wrote:

Paul,  This is clearly a  newbie question…but  I’m curious, what happens if the inverted V is an actual V? Where the  ends at 30 Ft and center is at 6ft?

 

Sent from Mail for Windows 10

 

From: Paul Butzi (W7PFB)
Sent: Saturday, April 4, 2020 10:51 AM
To: snovarc@snovarc.groups.io
Subject: [SnoVARC] Rowlands reflector question

 

Rowland asked if adding a reflector below his 80m OCFD would improve NVIS performance on 80m.

 

 

A bit more than a 2dBi improvement at 90 degrees.  That’s with the reflector length optimized for gain.  The modeled reflector height was .1m AGL.

 

The downside is that it messes up SWR somewhat.  I didn’t snap a comparison though, there are just too many installation variables to make the results meaningful.

 

 

 

-p W7PFB
73, Don’t forget to smile and have fun!

 

 


--
*************************
Howard E. Mahran
WA1HEM
(425) 864 - 5104
*************************

--
Thanks,
Rowland


Re: Rowlands reflector question

Jackson Beard
 

Nope.


On Sun, Apr 5, 2020, 17:59 Rowland <rowland.brasch@...> wrote:
Do you have any neighborhood restrictions

On Sun, Apr 5, 2020 at 5:10 PM Jackson Beard <macleanofduart@...> wrote:
Since everyone is offering antenna advice, I have a perfect condition kenwood hf radio I should use this time to get working. 

What's the easiest antenna to get put u pl in short order?

On Sun, Apr 5, 2020, 17:06 Howard E. Mahran / WA1HEM <wa1hem@...> wrote:

Paul,  This is clearly a  newbie question…but  I’m curious, what happens if the inverted V is an actual V? Where the  ends at 30 Ft and center is at 6ft?

 

Sent from Mail for Windows 10

 

From: Paul Butzi (W7PFB)
Sent: Saturday, April 4, 2020 10:51 AM
To: snovarc@snovarc.groups.io
Subject: [SnoVARC] Rowlands reflector question

 

Rowland asked if adding a reflector below his 80m OCFD would improve NVIS performance on 80m.

 

 

A bit more than a 2dBi improvement at 90 degrees.  That’s with the reflector length optimized for gain.  The modeled reflector height was .1m AGL.

 

The downside is that it messes up SWR somewhat.  I didn’t snap a comparison though, there are just too many installation variables to make the results meaningful.

 

 

 

-p W7PFB
73, Don’t forget to smile and have fun!

 

 


--
*************************
Howard E. Mahran
WA1HEM
(425) 864 - 5104
*************************

--
Thanks,
Rowland


Re: Rowlands reflector question

Rowland
 

Do you have any neighborhood restrictions

On Sun, Apr 5, 2020 at 5:10 PM Jackson Beard <macleanofduart@...> wrote:
Since everyone is offering antenna advice, I have a perfect condition kenwood hf radio I should use this time to get working. 

What's the easiest antenna to get put u pl in short order?

On Sun, Apr 5, 2020, 17:06 Howard E. Mahran / WA1HEM <wa1hem@...> wrote:

Paul,  This is clearly a  newbie question…but  I’m curious, what happens if the inverted V is an actual V? Where the  ends at 30 Ft and center is at 6ft?

 

Sent from Mail for Windows 10

 

From: Paul Butzi (W7PFB)
Sent: Saturday, April 4, 2020 10:51 AM
To: snovarc@snovarc.groups.io
Subject: [SnoVARC] Rowlands reflector question

 

Rowland asked if adding a reflector below his 80m OCFD would improve NVIS performance on 80m.

 

 

A bit more than a 2dBi improvement at 90 degrees.  That’s with the reflector length optimized for gain.  The modeled reflector height was .1m AGL.

 

The downside is that it messes up SWR somewhat.  I didn’t snap a comparison though, there are just too many installation variables to make the results meaningful.

 

 

 

-p W7PFB
73, Don’t forget to smile and have fun!

 

 


--
*************************
Howard E. Mahran
WA1HEM
(425) 864 - 5104
*************************

--
Thanks,
Rowland


Re: Rowlands reflector question

Jackson Beard
 

Since everyone is offering antenna advice, I have a perfect condition kenwood hf radio I should use this time to get working. 

What's the easiest antenna to get put u pl in short order?

On Sun, Apr 5, 2020, 17:06 Howard E. Mahran / WA1HEM <wa1hem@...> wrote:

Paul,  This is clearly a  newbie question…but  I’m curious, what happens if the inverted V is an actual V? Where the  ends at 30 Ft and center is at 6ft?

 

Sent from Mail for Windows 10

 

From: Paul Butzi (W7PFB)
Sent: Saturday, April 4, 2020 10:51 AM
To: snovarc@snovarc.groups.io
Subject: [SnoVARC] Rowlands reflector question

 

Rowland asked if adding a reflector below his 80m OCFD would improve NVIS performance on 80m.

 

 

A bit more than a 2dBi improvement at 90 degrees.  That’s with the reflector length optimized for gain.  The modeled reflector height was .1m AGL.

 

The downside is that it messes up SWR somewhat.  I didn’t snap a comparison though, there are just too many installation variables to make the results meaningful.

 

 

 

-p W7PFB
73, Don’t forget to smile and have fun!

 

 


--
*************************
Howard E. Mahran
WA1HEM
(425) 864 - 5104
*************************


Re: Rowlands reflector question

Howard E. Mahran / WA1HEM
 

Paul,  This is clearly a  newbie question…but  I’m curious, what happens if the inverted V is an actual V? Where the  ends at 30 Ft and center is at 6ft?

 

Sent from Mail for Windows 10

 

From: Paul Butzi (W7PFB)
Sent: Saturday, April 4, 2020 10:51 AM
To: snovarc@snovarc.groups.io
Subject: [SnoVARC] Rowlands reflector question

 

Rowland asked if adding a reflector below his 80m OCFD would improve NVIS performance on 80m.

 

 

A bit more than a 2dBi improvement at 90 degrees.  That’s with the reflector length optimized for gain.  The modeled reflector height was .1m AGL.

 

The downside is that it messes up SWR somewhat.  I didn’t snap a comparison though, there are just too many installation variables to make the results meaningful.

 

 

 

-p W7PFB
73, Don’t forget to smile and have fun!

 

 


--
*************************
Howard E. Mahran
WA1HEM
(425) 864 - 5104
*************************


Rowlands reflector question

Paul Butzi (W7PFB)
 

Rowland asked if adding a reflector below his 80m OCFD would improve NVIS performance on 80m.


A bit more than a 2dBi improvement at 90 degrees.  That’s with the reflector length optimized for gain.  The modeled reflector height was .1m AGL.

The downside is that it messes up SWR somewhat.  I didn’t snap a comparison though, there are just too many installation variables to make the results meaningful.




-p W7PFB
73, Don’t forget to smile and have fun!


Re: 80m OCFD NVIS

Paul Butzi (W7PFB)
 

On Apr 3, 2020, at 11:25 AM, Rowland <rowland.brasch@gmail.com> wrote:

Right now my OCFD is about 30-40' (don't know for sure). And the ends are only about 3' off the ground.

Two questions...

1. Will adding a reflector on the ground improve my NVIS?**
Without modeling it it’s hard to know for sure but I’m guessing yes, it will improve NVIS performance on 80m and probably on 40m. But I’ll model it and we’ll see.

2. Will raising the end wires to the 15' are improve things?
Improve things for NVIS or DX? 80m is the only band of interest, or 80m - 6m?

Again I haven’t modeled it (I will, though) but I’m guessing raising the ends improves the radiation pattern. But it will probably also change SWR.


** I will not be able to have the reflector wire exactly under the OCFD due to physical ground issues but it will be close
I think as long as the reflector is the right length and more or less under the antenna it would not make much difference.


-p W7PFB
73, Don’t forget to smile and have fun!


Re: 80m OCFD NVIS

Rowland
 

Right now my OCFD is about 30-40' (don't know for sure). And the ends are only about 3' off the ground. 

Two questions...

1. Will adding a reflector on the ground improve my NVIS?**
2. Will raising the end wires to the 15' are improve things?

**  I will not be able to have the reflector wire exactly under the OCFD due to physical ground issues but it will be close


Thanks,

Rowland



On Fri, Apr 3, 2020 at 10:54 AM Paul Butzi (W7PFB) <w7pfb@...> wrote:
Last night Rowland had an excellent question about how a 135’ OCFD antenna would work for NVIS, given that he’s made plenty of DX contacts using his OCFD.

This morning I ran some simulations of a 135 foot OCFD rigged approximately the way you’d have it if you followed the instructions from Buckmaster, with feedpoint about 33 feet AGL (Above Ground Level) and the ends about 15 feet - in other words, an inverted V.

The vertical radiation pattern you get is this:



That’s not an ideal NVIS pattern because it has more gain down near the horizontal (below, say, 30 degrees elevation) than you might like, but it’s giving you 4.5 dBi straight up so it would be a pretty good NVIS performer.

Rigged with the apex of the V up about 55 feet with the same leg drop improves NVIS performance by about 3 dB.

So what do you do if you want your OCFD to offer optimal DX performance instead of NVIS on the 80m band?

Raising the inverted V so the apex is at 45 meters gets you the following vertical pattern:


That gives you about 8.5 dBi at 26 degree takeoff angle, and about -1.5 dBi at 90 degrees.  It’s far more sensitive to both local and DX noise (think thunderstorms over Connecticut) and way less sensitive to NVIS signals.  It’s also not a circular pattern in the horizontal plane - it’s not shown in that diagram but all that gain is broadside to the axis of the antenna.  So if you decide to put your OCFD up at 145 feet, you want to think about how it’s oriented N/S/E/W.




-p W7PFB
73, Don’t forget to smile and have fun!


80m OCFD NVIS

Paul Butzi (W7PFB)
 

Last night Rowland had an excellent question about how a 135’ OCFD antenna would work for NVIS, given that he’s made plenty of DX contacts using his OCFD.

This morning I ran some simulations of a 135 foot OCFD rigged approximately the way you’d have it if you followed the instructions from Buckmaster, with feedpoint about 33 feet AGL (Above Ground Level) and the ends about 15 feet - in other words, an inverted V.

The vertical radiation pattern you get is this:



That’s not an ideal NVIS pattern because it has more gain down near the horizontal (below, say, 30 degrees elevation) than you might like, but it’s giving you 4.5 dBi straight up so it would be a pretty good NVIS performer.

Rigged with the apex of the V up about 55 feet with the same leg drop improves NVIS performance by about 3 dB.

So what do you do if you want your OCFD to offer optimal DX performance instead of NVIS on the 80m band?

Raising the inverted V so the apex is at 45 meters gets you the following vertical pattern:


That gives you about 8.5 dBi at 26 degree takeoff angle, and about -1.5 dBi at 90 degrees.  It’s far more sensitive to both local and DX noise (think thunderstorms over Connecticut) and way less sensitive to NVIS signals.  It’s also not a circular pattern in the horizontal plane - it’s not shown in that diagram but all that gain is broadside to the axis of the antenna.  So if you decide to put your OCFD up at 145 feet, you want to think about how it’s oriented N/S/E/W.




-p W7PFB
73, Don’t forget to smile and have fun!


Winlink Training Online

Rowland
 

Not sure if I sent this out or not but here it is again. A Sandiego ARES group created some nice YouTube videos on Winlink.




Thanks,

Rowland


Re: SnoVarc Thursday (4/2) Business and Elmer Monthly Meeting - Its ONLINE!

Howard E. Mahran / WA1HEM
 

Also - shout out to those that joined in the Tuesday Snovarc Video meeting trial run! I had fun and enjoyed socializing with everyone. 

Rowland K7RWB

Howard WA1HEM

Jim W7ABD

KC7QXD Ralph 

Tom WA7TBP 

Lindy - KG7IFA 

Paul Butzi W7PFB 

Kirt White - K7KDW 

Irvina Mizell W7IRM 

--
*************************
Howard E. Mahran
WA1HEM
(425) 864 - 5104
*************************


SnoVarc Thursday (4/2) Business and Elmer Monthly Meeting - Its ONLINE!

Howard E. Mahran / WA1HEM
 

A reminder that SnoVarc will have its normal monthly meeting this Thursday 4-2 for the first time online!

Business meeting starts at 18:15
Elmer session starts at 19:00

Easily join the meeting at join.freeconferencecall.com/snovarc
Short video on how to log in can be found here https://youtu.be/G7SM38kRj4o

We won't let the situation stop us from having our meetings. We hope to see you there!


--
*************************
Howard E. Mahran
WA1HEM
(425) 864 - 5104
*************************


Re: Field Day

Robin WA7CPA
 

Most importantly, ARRL needs to sell a lot of the FD gear they are heavily marketing. I like the green T-shirt and will probably buy one, even if I end up in my driveway. 

Stay safe and stay on the air,

Robin, WA7CPA


Re: Field Day

Irvina Mizell
 

Thanks.  I saw that one too.

Irvina


From: snovarc@snovarc.groups.io <snovarc@snovarc.groups.io> on behalf of Rowland <rowland.brasch@...>
Sent: Tuesday, March 31, 2020 8:19 PM
To: snovarc@snovarc.groups.io <snovarc@snovarc.groups.io>
Subject: [SnoVARC] Field Day
 
This is all I found




Thanks,

Rowland


Field Day

Rowland
 

This is all I found




Thanks,

Rowland


Re: Looking For Tap

Rowland
 

That is what is on the package the check valve was on.  it said 1/2" MPT which I took for the size of the tap.  What it meant was Male Pipe Thread.  It was a description of what was in the bag.  I meant to say NPT for the tap I was looking for.  Ben has loaned me one.

What happened was my hot water check valve was making noise which I believe means I am going to fail soon.  So I ordered two of them. One for cold in and one hot out.  I played hell getting them out as there was literally no room to work.  However with lots of straining and pleasant words expelled from my lips they both eventually came out.  The threads look OK but I want to run a tap down them to clean them before installing the check valves just to make sure of a good leak proof fit.

I will be doing that tomorrow so if you step outside and listen closely you might hear the thunder in my direction as I try to fit my hands back in there again.  In reaiity it should go better as I learned a few tricks removing them.


Thanks,

Rowland



On Mon, Mar 30, 2020 at 6:12 PM <cwoolfolk@...> wrote:
Hi Rowland,  I don't know what MPT means.  I have course and fine thread taps.  Educate me please!

Hope you and Kathy are doing well in these trying times.

Chuck

----- Original Message -----
From: Rowland <rowland.brasch@...>
To: snovarc@snovarc.groups.io
Sent: Mon, 30 Mar 2020 19:05:51 -0400 (EDT)
Subject: [SnoVARC] Looking For Tap

Hi All,

I am looking to borrow a 1/2" MPT size thread  tap to clean out some threads on my RV water heater water connections.  Checked at Duvall hardware and they do not carry one.  Please let me know if someone has one I can use for about 30 minutes.


Thanks,

Rowland





Re: Looking For Tap

cwoolfolk@...
 

Hi Rowland,  I don't know what MPT means.  I have course and fine thread taps.  Educate me please!

Hope you and Kathy are doing well in these trying times.

Chuck

----- Original Message -----
From: Rowland <rowland.brasch@...>
To: snovarc@snovarc.groups.io
Sent: Mon, 30 Mar 2020 19:05:51 -0400 (EDT)
Subject: [SnoVARC] Looking For Tap

Hi All,

I am looking to borrow a 1/2" MPT size thread  tap to clean out some threads on my RV water heater water connections.  Checked at Duvall hardware and they do not carry one.  Please let me know if someone has one I can use for about 30 minutes.


Thanks,

Rowland





Tap

Rowland
 

Ben has been so kind to loan me a tap.  Thank yo everyone...!


Thanks,

Rowland


Looking For Tap

Rowland
 

Hi All,

I am looking to borrow a 1/2" MPT size thread  tap to clean out some threads on my RV water heater water connections.  Checked at Duvall hardware and they do not carry one.  Please let me know if someone has one I can use for about 30 minutes.


Thanks,

Rowland


INFO: Online social gathering Trial Run on Tuesday 3-31 @19:00

Howard E. Mahran / WA1HEM
 

Hello SnoVarcians,

For the trial run conference call/video session on Tuesday, March 31 at 19:00 below is a quick "how-to" for accessing the FreeConferenceCall.com session.

1) Have a decent internet connection (both up and downstream)
2) Use a browser (Chrome, Firefox, etc) and enter URL https://join.freeconferencecall.com/snovarc
3) Enter your Name and Callsign in the Name field ("Howard - WA1HEM") and an email address, then click "Join"
        3a) For those that already have a FreeConferenceCall account, go to Join and enter "snovarc"
4) To use a Phone for Voice: Use the dial-in number displayed at the top of the screen and enter the sync code. You will speak and listen through your phone
        4a) To use your PC with a speaker/headset and microphone: Click  the phone icon and then select "Mic and Speakers"
5) Click the video icon to turn on and off your video camera 

Here is a very short 1 minute video to demonstrate what you'll see   https://youtu.be/G7SM38kRj4o

There might be some tweaks you will need to make to access the right speaker/headset and microphone on your PC. If they aren't correctly selected when you first log in, click the gear icon. You can choose the correct mic/speaker and video inputs from there. And Finally, there are several variables that can affect the quality of your session, so be patient and we will try to help you get up and running as best we can. 

Looking forward to having a fun online rag-chew!

Let me know if you have any questions.

73,

Howard - WA1HEM


--
*************************
Howard E. Mahran
WA1HEM
(425) 864 - 5104
*************************

941 - 960 of 6303