Date   

SMARC Club Meeting Monday Sept-28, 7PM

Bob Wilson-KK4XA
 

Hey dont forget Tomorrow night !
MONDAY 7PM
See below and copy of previous email.
Come early as we will be setting up by 6PM and enjoy eyeball QSO's for a change. 
Remember Mask? Its up to you if you wear one. Nobody gonna throw you out for not having one!
==========
Need a program/codeplug in your HT or Mobile?
Will have on site programming for the following.
Anytone portables & Yaesu FT 60, FT-65, FT-8800, FT 8900
Baofeng & Radioddity GD-77 portable radios also!


---------- Forwarded message ---------
From: BOB WILSON <bobwilson3810@...>
Date: Thu, Sep 24, 2020 at 3:06 PM
Subject: SMARC Club Meeting Monday Sept-28, 7PM
To: SMARC@groups.io Not. <noreply@groups.io>



SMARC-CLUB LOGO.PNG

Hello Everyone!

SMARC will have its first meeting since February in person! 

It will be held at FIELD OF DREAMS.

FIELD OF DREAMS  is where we have Field Day! 

Bring your favorite Drink/Beverage (NO ALCOHOL ALLOWED!). There will be Coffee and snacks and if you want to bring an additional food item, feel free to do so.  

REMEMBER 
COVID STILL EXIST!! USE CAUTION

NOTE: IF YOU ARE EXHIBITING ANY COVID-19 SYMPTOMS, PLEASE STAY HOME.
 SELF TEST YOURSELF!!
  • Have you been in close contact with a confirmed case of COVID-19 in the past 14 days?
  • Are you experiencing a cough, shortness of breath, or sore throat?
  • Have you had a fever in the last 48 hours?
I'll be wearing a mask, WILL YOU?

WHATS THE MEETING ABOUT???
  • SMARC-NEW APP's
  • Club Constitution
  • Repeater Maintenance
  • FOXHUNT - OCT 17, 2020 Where- TBA
SPECIAL VIDEO PRESENTATION   OVER 1 HOUR LONG!
SPARKY- WB4NBE-SK 

SILENT KEY Nov. 18, 2012

1961-1970: NASA MISSION CONTROL, CAPE CANAVERAL.  SPACECRAFT COMMUNICATIONS FOR MERCURY, GEMINI, AND APOLLO PROGRAMS.  FLIGHT CONTROLLER NCS CONSOLE FOR NASA WORLD WIDE COMMUNICATION NETWORK.

1970-2012: OAK RIDGE NATIONAL LABORATORY, RF ENGINEER, STAR WARS, FUSION ENERGY, NASA MANNED MISSION TO MARS AND PLASMA ROCKET PROGRAMS.  U.S. PATENT #5867020 - Cap coupled rf voltage probe with optimized flux linkage.

U.S. PATENT #5834931 - RF Current Sensor

FULL COLONEL IN USAF AUX/CAP RET. FLEW SEARCH AND RESCUE MISSIONS FOR 30 YR. SERVED AS DIR. OF OPERATIONS FOR 10 YR AND WING COMMANDER FOR THE STATE OF TENNESSEE FOR 4 YEARS.

HOBBIES: HAM RADIO, FLYING A/C, CIVIL WAR COLLECTOR




IMG_0363.jpg


If you don't want to come due to circumstances, be watching for a SMARC-ZOOM  invite.  (If technically possible, no Internet at site!)

See you there or on ZOOM!

TALK IN 
146.655MHz Tone 100Hz

73

KK4XA
SMARC-President
Maryville, TN
865-755-3810




--

Bob Wilson
KK4XA
Maryville, TN

--
Bob Wilson - KK4XA


Re: New Radio

R Monserrat
 

Hi Eric, congrats!
Great! Looking forward to hear you via your new radio FT3D
KM4TUY (Ralph)


On Fri, Sep 25, 2020 at 9:43 PM Eric Ressler <tornadospotter99@...> wrote:


-- I got a new radio this week! A Yaesu FT3D handheld! Brad KM4OJK programmed it with his program. Thanks to him for his gracious assistance! 


I would like to hear many of you on the Tellico Village repeater. I will be around!
KD8LHZ


Re: New Radio

michael J. foley
 

I usually monitor the 442.100 K1AT repeater in analog FM and the 443.050 W4WVJ repeater in Digital.

"Throw" your call. I'm sure you'll get a response. 

Looking forward to talking with you SOON! 

73,
Mike, K4MJF

On Fri, Sep 25, 2020, 9:43 PM Eric Ressler <tornadospotter99@...> wrote:


-- I got a new radio this week! A Yaesu FT3D handheld! Brad KM4OJK programmed it with his program. Thanks to him for his gracious assistance! 


I would like to hear many of you on the Tellico Village repeater. I will be around!
KD8LHZ


Re: New Radio

Jacob Lindsey ( KN4YAV ) and Kayla Lindsey ( KO4DEG )
 

Congratulations man! 

Youll hear me on from time to time in the mid-mornings if i catch a break from homeschooling my kids!

Ill check in around noon tomorrow if you want to be on

Jacob Lindsey
KN4YAV
73


On Fri, Sep 25, 2020, 21:43 Eric Ressler <tornadospotter99@...> wrote:


-- I got a new radio this week! A Yaesu FT3D handheld! Brad KM4OJK programmed it with his program. Thanks to him for his gracious assistance! 


I would like to hear many of you on the Tellico Village repeater. I will be around!
KD8LHZ


New Radio

Eric Ressler
 


-- I got a new radio this week! A Yaesu FT3D handheld! Brad KM4OJK programmed it with his program. Thanks to him for his gracious assistance! 


I would like to hear many of you on the Tellico Village repeater. I will be around!
KD8LHZ


Sweetwater Hamfest tomorrow morning!

George N2APB
 

Hamfest flier (with map+directions) on our homepage.

 

See you there!

 

George N2APB

https://www.tlarc.org/

 

 


Welsh Village Traces 18 Months of Internet Outages to Old TV

Brad (the Voice of the Village) Berger
 

This sounds familiar to our repeater interference problems with cheap over-the-air Chinese antenna amplifiers.

https://www.pcmag.com/news/welsh-village-traces-18-months-of-internet-outages-to-old-tv?utm_source=email&utm_campaign=whatsnewnow&utm_medium=title



Nets tonight

David Andrews
 

Don’t forget tonight’s radio and Zoom nets.

 

Join Zoom Meeting

https://us02web.zoom.us/j/83006146324?pwd=elY5VVNETUZKYUxpcW54dFhQV0hvZz09

 

Meeting ID: 830 0614 6324

Password: 099892

One tap mobile

+19292056099,,83006146324#,,1#,099892# US (New York)

+13017158592,,83006146324#,,1#,099892# US (Germantown)

 

Dial by your location

        +1 929 205 6099 US (New York)

        +1 301 715 8592 US (Germantown)

        +1 312 626 6799 US (Chicago)

        +1 669 900 6833 US (San Jose)

        +1 253 215 8782 US (Tacoma)

        +1 346 248 7799 US (Houston)

Meeting ID: 830 0614 6324

Password: 099892

Find your local number: https://us02web.zoom.us/u/kbJYC2Q4s7

 


Emailing: Sweetwater Tailgate Hamfest 2020.pdf

David Andrews
 


Antenna

Eric Ressler
 

Does anyone have a 2m antenna that would fit a windowsill that I may borrow? I have one on order!
Thanks 
Eric Ressler
--
Chaser

--
KD8LHZ 


Dr HEIL INTERVIEW TONIGHT HAMNATION

Bob Wilson-KK4XA
 

Tonight at 9pm eastern there will be a live interview with Dr Heil on Hamnation on utube.
W4DXY DixieDX will be there.

73
Bob Wilson
KK4XA
Maryville, TN





--
Bob Wilson - KK4XA


A quick correction

WK9M
 

Hi all; something I noticed late last night after I re-read that article below.  And a little correction.

When comparing VSWR voltages, you have to compare apples to apples.  i.e. peak voltage to peak voltage; not compare the rms (the DC equivalent) to peak voltage.  The article mentions the rms formula and then goes on to compare it to the peak formula.  Just using the same formula below with SWR=1 is more straightforward.  So...

1:1 Vpk=sqrt(100*100*1)=100v
3:1 Vpk=sqrt(100*100*3)=173.2v

Now you see this is even less dramatic than 3x the voltage.  Ironically it's 73% more voltage.  I've seen that 73 number somewhere before.

'73
Randy

On 9/22/2020 5:10 PM, RK wrote:
Sounds good Allan; the actual loss depends on transmission line quality and frequency then as we chatted on the phone when I was by Ralph's earlier.  i.e the losses would be much greater with a long run at 440MHz and 3:1 as it bounces back and forth.  Maybe we should just superconducting coax and then the answer is always 100%?  Ok so maybe not practical on that one.  :)

I found the actual article on voltage, VSWR, and surge suppressors that I had talked about during the presentation if anyone is interested.  The formula is (2) on page 4 of this document for the techies in the club:
http://www.arrl.org/files/file/QEX_Next_Issue/2016/July-August/Hinkle.pdf

Vpk=sqrt(100*PWR*SWR)

So on a 100W signal into 50 ohms at 1:1, the common Ohm's law formula states 70.7V (P=(V^2)/R); solving for V.

At 3:1, the voltage isn't 70.7*3=210.9V but 173.2V...a little less than 3X as you noted.

With 1.5kW, it's an amazing 671V.  So that's why you always tune high power.

'73
Randy

On 9/22/2020 2:29 PM, John Haskell via groups.io wrote:
Randy,

Thanks for your thoughts.  Good point on the peak voltage being higher with a non-perfect match.

The  4-11-25 "rule" works well if the line is very lossy.

I must say though that the 4-11-25 "rule" doesn't quite cut it for low loss transmission lines.

For example, consider a lossless line with a 2:1 SWR.  What percentage of the transmitter's power is radiated?  Answer:  All the power is radiated [not 90%].

What about with a 10:1 SWR?  The loss is again zero!   All the power is radiated.  Think open wire or ribbon line.  This is an important concept.  Even with a high SWR,  100% of the power is radiated.

What really happens is the reflected power is re-reflected at the transmitter [near 100% of it] and is not lost to dissipation in the transmitter.  The reflected power, when it reaches the transmitter, is reflected back in the forward direction where much will be radiated when it again reaches the antenna.  Eventually all the power is radiated in spite of an SWR greater than 1 except for the portion dissipated in the transmission line.  Just think of the energy ping-ponging back and forth with some being radiated when the energy hits the antenna each time.

When some line loss is present the reflected power does suffer some loss in the transmission line on the way back and forward, and that is what the additional loss beyond the SWR 1:1 case represents.  As long as the line has, say, less than a dB or two of loss the additional loss caused by SWR can pretty much be ignored.

73,
Allan



Re: [SMARC] Sevier County Amateur Radio Society Hamfest-DixieDX W4DXY

David Andrews
 

Well done Bob.

 

David N1ESK

 

From: TLARC@groups.io <TLARC@groups.io> On Behalf Of Bob Wilson
Sent: Tuesday, September 22, 2020 10:48 PM
To: TLARC@groups.io
Subject: [TLARC] [SMARC] Sevier County Amateur Radio Society Hamfest-DixieDX W4DXY

 

Hello TLARC. Thought I would share this with you. Feel free to forward. Really a nice gal coming along in the hobby with her own utube channel as you will see

Be sure to reach out to her too.  

 

73

 

---------- Forwarded message ---------
From: Robert Wilson via groups.io <kk4xa=icloud.com@groups.io>
Date: Tue, Sep 22, 2020 at 10:04 PM
Subject: [SMARC] Sevier County Amateur Radio Society Hamfest
To: SMARC@groups.io Not. <smarc@groups.io>



In case you weren’t at the Sevier county hamfest check out this video including a interview with me.  The earlier version I sent was the “Raw” footage.



Here is the completed video.



https://youtu.be/okyGb7SV4jY



73

Bob Wilson

KK4XA

Maryville, TN
















--

 

Bob Wilson

KK4XA

Maryville, TN


--
Bob Wilson - KK4XA


[SMARC] Sevier County Amateur Radio Society Hamfest-DixieDX W4DXY

Bob Wilson-KK4XA
 

Hello TLARC. Thought I would share this with you. Feel free to forward. Really a nice gal coming along in the hobby with her own utube channel as you will see
Be sure to reach out to her too.  

73

---------- Forwarded message ---------
From: Robert Wilson via groups.io <kk4xa=icloud.com@groups.io>
Date: Tue, Sep 22, 2020 at 10:04 PM
Subject: [SMARC] Sevier County Amateur Radio Society Hamfest
To: SMARC@groups.io Not. <smarc@groups.io>


In case you weren’t at the Sevier county hamfest check out this video including a interview with me.  The earlier version I sent was the “Raw” footage.



Here is the completed video.



https://youtu.be/okyGb7SV4jY



73

Bob Wilson

KK4XA

Maryville, TN

















--

Bob Wilson
KK4XA
Maryville, TN

--
Bob Wilson - KK4XA


Re: Does a low SWR mean your antenna is a great performer?

WK9M
 

Sounds good Allan; the actual loss depends on transmission line quality and frequency then as we chatted on the phone when I was by Ralph's earlier.  i.e the losses would be much greater with a long run at 440MHz and 3:1 as it bounces back and forth.  Maybe we should just superconducting coax and then the answer is always 100%?  Ok so maybe not practical on that one.  :)

I found the actual article on voltage, VSWR, and surge suppressors that I had talked about during the presentation if anyone is interested.  The formula is (2) on page 4 of this document for the techies in the club:
http://www.arrl.org/files/file/QEX_Next_Issue/2016/July-August/Hinkle.pdf

Vpk=sqrt(100*PWR*SWR)

So on a 100W signal into 50 ohms at 1:1, the common Ohm's law formula states 70.7V (P=(V^2)/R); solving for V.

At 3:1, the voltage isn't 70.7*3=210.9V but 173.2V...a little less than 3X as you noted.

With 1.5kW, it's an amazing 671V.  So that's why you always tune high power.

'73
Randy

On 9/22/2020 2:29 PM, John Haskell via groups.io wrote:
Randy,

Thanks for your thoughts.  Good point on the peak voltage being higher with a non-perfect match.

The  4-11-25 "rule" works well if the line is very lossy.

I must say though that the 4-11-25 "rule" doesn't quite cut it for low loss transmission lines.

For example, consider a lossless line with a 2:1 SWR.  What percentage of the transmitter's power is radiated?  Answer:  All the power is radiated [not 90%].

What about with a 10:1 SWR?  The loss is again zero!   All the power is radiated.  Think open wire or ribbon line.  This is an important concept.  Even with a high SWR,  100% of the power is radiated.

What really happens is the reflected power is re-reflected at the transmitter [near 100% of it] and is not lost to dissipation in the transmitter.  The reflected power, when it reaches the transmitter, is reflected back in the forward direction where much will be radiated when it again reaches the antenna.  Eventually all the power is radiated in spite of an SWR greater than 1 except for the portion dissipated in the transmission line.  Just think of the energy ping-ponging back and forth with some being radiated when the energy hits the antenna each time.

When some line loss is present the reflected power does suffer some loss in the transmission line on the way back and forward, and that is what the additional loss beyond the SWR 1:1 case represents.  As long as the line has, say, less than a dB or two of loss the additional loss caused by SWR can pretty much be ignored.

73,
Allan


Re: Does a low SWR mean your antenna is a great performer?

John Haskell <jasm2213@...>
 

Randy,

Thanks for your thoughts.  Good point on the peak voltage being higher with a non-perfect match.

The  4-11-25 "rule" works well if the line is very lossy.

I must say though that the 4-11-25 "rule" doesn't quite cut it for low loss transmission lines.

For example, consider a lossless line with a 2:1 SWR.  What percentage of the transmitter's power is radiated?  Answer:  All the power is radiated [not 90%].

What about with a 10:1 SWR?  The loss is again zero!   All the power is radiated.  Think open wire or ribbon line.  This is an important concept.  Even with a high SWR,  100% of the power is radiated.

What really happens is the reflected power is re-reflected at the transmitter [near 100% of it] and is not lost to dissipation in the transmitter.  The reflected power, when it reaches the transmitter, is reflected back in the forward direction where much will be radiated when it again reaches the antenna.  Eventually all the power is radiated in spite of an SWR greater than 1 except for the portion dissipated in the transmission line.  Just think of the energy ping-ponging back and forth with some being radiated when the energy hits the antenna each time.

When some line loss is present the reflected power does suffer some loss in the transmission line on the way back and forward, and that is what the additional loss beyond the SWR 1:1 case represents.  As long as the line has, say, less than a dB or two of loss the additional loss caused by SWR can pretty much be ignored.

73,
Allan


Re: IRS Determination Letter

Brad (the Voice of the Village) Berger
 

Congratulations David and thank you for getting this 501 (c)(3) together. Not only did you do an outstanding job, but you are now officially our club attorney.

The Hon. David F. Andrews Esq.
Now about that speeding ticket I got...


Brad B.


Re: Does a low SWR mean your antenna is a great performer?

WK9M
 

Yes I think that a presentation would be a great idea--TLARC is looking for new presentations.  I myself put in memory the 4-11-25% rule.  i.e. 1.5:1 is 4% loss, 2:1 is 11% loss, and 3:1 is 25% loss.  I found a document online that confirms my memory is correct:
http://www.packetradio.com/pdfzips/SWRvsPowerNwatts.pdf

And as you point out, 2:1 is a .5 dB loss.  Even 3:1 is only a 1/5 of an S-unit (1.25dB loss); I'd say that a computer can hear that difference but probably not a human.

Many modern radios will start cutting power back at even moderate VSWR levels.  So as you say, watch the power out.  Both of my Kenwood HF radios are picky on 6m for example.

VSWR can have a bad effect on surge arrestors if you happen to buy a low power one and operate it with high VSWR.  (3:1 is literally 3x the voltage).  But I doubt any of us would do that, at least on purpose.  I went over that in my surge presentation about a year ago.

'73,
Randy

On 9/21/2020 12:48 PM, John Haskell via groups.io wrote:
What George quoted from ham.stackexchange is correct.

To take it a bit further, SWR can be pretty much ignored.  If your solid state transmitter functions with normal output power versus shutting down, then SWR really does not matter much for most installations.  This is particularly true at HF where cable loss is minimal.  At UHF and with a long transmission line SWR can cause unacceptable losses.  

Here are a couple of examples of SWR versus loss using inexpensive RG-58.

Assume 7MHz and 75 feet of RG-58.  The cable loss is .9dB with a SWR of 1.

But what if the SWR is 2:1?  The extra loss due to this SWR is .2dB, e.g., negligible.


For a mobile set up on 442.1MHz..   Many people go nuts with low loss cables.  Not me. I use RG-58 in the car.  Here is why.  For 442MHz, 10feet of cable, and a 2:1 SWR, the additional loss due to the 2:1 SWR versus a perfect match is .2dB.  I do not believe you will notice that extra loss.


I have been considering putting a transmission line/SWR presentation together for TLARC in hopes of dispelling some of the common myths.  If there is interest let me know.  Maybe that will get me off my butt.

73, K1AT


IRS determination letter

David Andrews
 

Folks,

 

I am pleased to share with you the attached correspondence from the Internal Revenue Service officially designating TLARC as a 501(c)3 organization. This culminates the efforts of the past many months, including becoming a Tennessee Non-Profit Corporation, revising our organizing documents, and providing multiple submittals as part of the IRS exempt application.

 

Respectfully,

 

David Andrews N1ESK, Secretary


Re: Does a low SWR mean your antenna is a great performer?

John Haskell <jasm2213@...>
 

What George quoted from ham.stackexchange is correct.

To take it a bit further, SWR can be pretty much ignored.  If your solid state transmitter functions with normal output power versus shutting down, then SWR really does not matter much for most installations.  This is particularly true at HF where cable loss is minimal.  At UHF and with a long transmission line SWR can cause unacceptable losses.  

Here are a couple of examples of SWR versus loss using inexpensive RG-58.

Assume 7MHz and 75 feet of RG-58.  The cable loss is .9dB with a SWR of 1.

But what if the SWR is 2:1?  The extra loss due to this SWR is .2dB, e.g., negligible.


For a mobile set up on 442.1MHz..   Many people go nuts with low loss cables.  Not me. I use RG-58 in the car.  Here is why.  For 442MHz, 10feet of cable, and a 2:1 SWR, the additional loss due to the 2:1 SWR versus a perfect match is .2dB.  I do not believe you will notice that extra loss.


I have been considering putting a transmission line/SWR presentation together for TLARC in hopes of dispelling some of the common myths.  If there is interest let me know.  Maybe that will get me off my butt.

73, K1AT

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