Date   

Re: FW: Azle ISD

Mike Burns, KE5NCS
 

Hi Paul.

I attended the swap meet last year at the same location (church) where it will be held this year.  There were plenty of tables and chairs available.  Perhaps Daryl Pate can confirm this.

Mike

On Wednesday, September 19, 2018, 3:16:00 PM CDT, AzleComm <AzleComm@...> wrote:


Please note the folding tables on the lower left.  Do we need any for the Swapmeet or does the Church have plenty?

 

Paul

 

From: Azle Chamber of Commerce <promote@...>
Sent: Wednesday, September 19, 2018 2:00 PM
To: azlecomm@...
Subject: Azle ISD

 

Surplus Sale

 

 

Azle Chamber of Commerce | 404 W. Main St. , Ste. 102, Azle, TX 76020

 


Virus-free. www.avast.com


FW: Azle ISD

AzleComm
 

Please note the folding tables on the lower left.  Do we need any for the Swapmeet or does the Church have plenty?

 

Paul

 

From: Azle Chamber of Commerce <promote@...>
Sent: Wednesday, September 19, 2018 2:00 PM
To: azlecomm@...
Subject: Azle ISD

 

Surplus Sale

 

 

Azle Chamber of Commerce | 404 W. Main St. , Ste. 102, Azle, TX 76020

 


Virus-free. www.avast.com


WC5CTech Net - Wed, 9/19/18 #cal-notice

wc5c@groups.io Calendar <noreply@...>
 

WC5CTech Net

When:
Wednesday, 19 September 2018
7:30am to 8:30am
(GMT-05:00) America/Chicago

Where:
147.160 Repeater

Description:
Weekly technical net open to any amateur radio operators for the purpose of discussion of any amateur subjects and provide assitance to amateur radio operators atempting to acquire any level of license.


WC5CTech Net - Wed, 9/19/18 7:30am-8:30am #cal-reminder

wc5c@groups.io Calendar <wc5c@...>
 

Reminder:
WC5CTech Net

When:
Wednesday, 19 September 2018
7:30am to 8:30am
(GMT-05:00) America/Chicago

Where:
147.160 Repeater

Description:
Weekly technical net open to any amateur radio operators for the purpose of discussion of any amateur subjects and provide assitance to amateur radio operators atempting to acquire any level of license.

View Event.


WC5CTech Net - Wed, 9/19/18 7:30am-8:30am #cal-reminder

wc5c@groups.io Calendar <wc5c@...>
 

Reminder:
WC5CTech Net

When:
Wednesday, 19 September 2018
7:30am to 8:30am
(GMT-05:00) America/Chicago

Where:
147.160 Repeater

Description:
Weekly technical net open to any amateur radio operators for the purpose of discussion of any amateur subjects and provide assitance to amateur radio operators atempting to acquire any level of license.

View Event.


Net Notes 9/13/2018

Jon, N5JLD
 

Date Time Callsign Frequency Mode Band Name City State County Grid Remarks Net Name Log NCS
9/14/2018 01:05:34 KE5NCS 147.16 FM 2m Michael D Burns Azle TX Tarrant EM12fv WC5C Weekly Net N5JLD KE5NCS
9/14/2018 01:05:37 N5JLD 147.16 FM 2m Jon Diner Fort Worth TX Tarrant EM12ht WC5C Weekly Net N5JLD KE5NCS
9/14/2018 01:05:48 KB5UQ 147.16 FM 2m Wayne Morris Springtown TX Parker EM12ex WC5C Weekly Net N5JLD KE5NCS
9/14/2018 01:07:44 KE5ZGZ 147.16 FM 2m Richard A Marx Aledo TX Tarrant EM12fr WC5C Weekly Net N5JLD KE5NCS
9/14/2018 01:08:50 KG5ZUY 147.16 FM 2m Walter W Graves Springtown TX Parker EM12ew No Traffic WC5C Weekly Net N5JLD KE5NCS
9/14/2018 01:08:53 AF5PK 147.16 FM 2m Gerry C Hale Azle TX Tarrant EM12fv No Traffic WC5C Weekly Net N5JLD KE5NCS
9/14/2018 01:16:17 KG5SQJ 147.16 FM 2m Bob Ballard Aledo TX Parker EM12ep WC5C Weekly Net N5JLD KE5NCS
9/14/2018 01:16:25 KG5FNV 147.16 FM 2m Tommy Latham Azle TX Tarrant EM12fx WC5C Weekly Net N5JLD KE5NCS
9/14/2018 01:22:26 WB5IDM 147.16 FM 2m Paul Finch Azle TX Parker EM12fv WC5C Weekly Net N5JLD KE5NCS
9/14/2018 01:24:35 KJ5MA 147.16 FM 2m Mack E Avery Aledo TX Parker EM12bq WC5C Weekly Net N5JLD KE5NCS
9/14/2018 01:24:55 KG5BZW 147.16 FM 2m Jay F Cox Weatherford TX Parker EM12ds WC5C Weekly Net N5JLD KE5NCS
9/14/2018 01:27:44 KC5SLQ 147.16 FM 2m Daryl R Pate Fort Worth TX Tarrant EM12fu WC5C Weekly Net N5JLD KE5NCS
9/14/2018 01:29:10 KG5SRG 147.16 FM 2m Michael F Norton Springtown TX Parker EM12ku No Traffic WC5C Weekly Net N5JLD KE5NCS

______________
Have fun,
Jon N5JLD
http://www.n5jld.net

--
---------
Have fun,
Jon N5JLD
www.n5jld.net


Event: WC5CTech Net #cal-invite

wc5c@groups.io Calendar <wc5c@...>
 

WC5CTech Net

When:
Wednesday, 29 August 2018
7:30am to 8:30am
(GMT-05:00) America/Chicago
Repeats: Weekly on Wednesday

Where:
147.160 Repeater

Description:
Weekly technical net open to any amateur radio operators for the purpose of discussion of any amateur subjects and provide assitance to amateur radio operators atempting to acquire any level of license.


TCARC Weekly Net - Thu, 9/13/18 8:00pm-8:30pm #cal-reminder

wc5c@groups.io Calendar <wc5c@...>
 

Reminder:
TCARC Weekly Net

When:
Thursday, 13 September 2018
8:00pm to 8:30pm
(GMT-05:00) America/Chicago

Where:
147.16 +0.600 110.9

Description:
Weekly club net. All are welcome. Stop by and chat, rant, or just check in to say hi.

View Event.


Net Control

Wayne Morris - AC5V
 

All – I have a class that just came up for tonight and tomorrow. I won’t be able to make the Tech net. Can one of you please take the net?

 

You can choose whatever you like for the question pool. We were on G0B04 if you want to continue from last week.

 

Thanks,

Wayne


Re: Headphone Amplifier

Michael Heusser, kl7sg
 

Sounds good Bill.

 

Thanks,

 

Mike

 

Sent from Mail for Windows 10

 

From: Bill Boyer
Sent: Monday, September 10, 2018 9:10 PM
To: WC5C
Subject: Re: [wc5c] Headphone Amplifier

 

Yes. The port on the back will only monitor one receiver, whichever one is selected by the menu item. However, this frees up the internal or external speaker for normal use, and does not require adjustment of the radio volume, in addition to the headphone amp volume. It also prevents some bozo from damaging the headphone amp by cranking up the radio volume. I chose this route because I assumed the A side of the radio was going to be used for APRS. We can always add another input for an HT or other radio if needed. 

Here is the menu info -- B-Band is the right VFO:

External Data Band

1 Enter Menu mode and access Menu 918.

2 Set the data band to A-BAND (A band receives and

transmits), B-BAND (B band receives and transmits),

TX:A-BAND RX:B-BAND (A band transmits and B band

receives), or RX:A-BAND

 

 

 

On Mon, Sep 10, 2018 at 8:30 PM Michael Heusser, kl7sg <kl7sg@...> wrote:

Thanks Bill,

 

Will we be able to hear just one of the receivers?

 

Thanks,

 

Mike

Kl7sg

 

Sent from Mail for Windows 10

 

From: Bill Boyer
Sent: Monday, September 10, 2018 12:23 PM
To: WC5C
Subject: [wc5c] Headphone Amplifier

 

Forgot to mention you need to change the external data port setting (menu 71, IIRC) to side B - so you will hear whatever is on the right side of the display. Otherwise you will hear the APRS.  

 

 


Re: Headphone Amplifier

Bill Boyer
 

Yes. The port on the back will only monitor one receiver, whichever one is selected by the menu item. However, this frees up the internal or external speaker for normal use, and does not require adjustment of the radio volume, in addition to the headphone amp volume. It also prevents some bozo from damaging the headphone amp by cranking up the radio volume. I chose this route because I assumed the A side of the radio was going to be used for APRS. We can always add another input for an HT or other radio if needed. 

Here is the menu info -- B-Band is the right VFO:

External Data Band
1 Enter Menu mode and access Menu 918.
2 Set the data band to A-BAND (A band receives and
transmits), B-BAND (B band receives and transmits),
TX:A-BAND RX:B-BAND (A band transmits and B band
receives), or RX:A-BAND



On Mon, Sep 10, 2018 at 8:30 PM Michael Heusser, kl7sg <kl7sg@...> wrote:

Thanks Bill,

 

Will we be able to hear just one of the receivers?

 

Thanks,

 

Mike

Kl7sg

 

Sent from Mail for Windows 10

 

From: Bill Boyer
Sent: Monday, September 10, 2018 12:23 PM
To: WC5C
Subject: [wc5c] Headphone Amplifier

 

Forgot to mention you need to change the external data port setting (menu 71, IIRC) to side B - so you will hear whatever is on the right side of the display. Otherwise you will hear the APRS.  

 


Re: Headphone Amplifier

Michael Heusser, kl7sg
 

Thanks Bill,

 

Will we be able to hear just one of the receivers?

 

Thanks,

 

Mike

Kl7sg

 

Sent from Mail for Windows 10

 

From: Bill Boyer
Sent: Monday, September 10, 2018 12:23 PM
To: WC5C
Subject: [wc5c] Headphone Amplifier

 

Forgot to mention you need to change the external data port setting (menu 71, IIRC) to side B - so you will hear whatever is on the right side of the display. Otherwise you will hear the APRS.  

 


Headphone Amplifier

Bill Boyer
 

Forgot to mention you need to change the external data port setting (menu 71, IIRC) to side B - so you will hear whatever is on the right side of the display. Otherwise you will hear the APRS.  


Updated - Radio Output Minus Coax and VSWR Losses Plus Antenna Gain = ERP Calculator

Bob Ballard
 

Note the Excel file attached above.  My thanks go to Mike Heusser (KL7SG) and Wayne Morris (KB5UQ) for their voluntary assistance with this project! 

 

Those two guys not only suggested adding VSWR to the original Calculator worksheet I distributed earlier, they also provided the formulas needed to accomplish that mod.  Mike and Wayne also clarified some of the nomenclature I originally used.

 

The calculator is also re-named as Radio Output Minus Coax and VSWR Losses Plus Antenna Gain = ERP Calculator.xlsx.  That is a ridiculously long filename but it describes what the worksheet does.

 

73,

Bob – KG5SQJ

 

 


New file uploaded to wc5c@groups.io

wc5c@groups.io Notification <wc5c+notification@...>
 

Hello,

This email message is a notification to let you know that a file has been uploaded to the Files area of the wc5c@groups.io group.

File: WC5C-Minutes-2018-08-04-Redacted.pdf

Uploaded By: Jay Cox

Description:
August 2018 Minutes with Financial Info Redacted

You can access this file at the URL:
https://groups.io/g/wc5c/files/WC5C%20Minutes/2018%20Minutes/WC5C-Minutes-2018-08-04-Redacted.pdf

Cheers,
The Groups.io Team


Tri-County ARC Meeting - Sat, 9/8/18 7:00pm-8:00pm #cal-reminder

wc5c@groups.io Calendar <wc5c@...>
 

Reminder:
Tri-County ARC Meeting

When:
Saturday, 8 September 2018
7:00pm to 8:00pm
(GMT-05:00) America/Chicago

Where:
City Hall Chambers / Azle Texas

Description:
613 Southeast Pkwy, Azle, TX 76020

View Event.


Re: Coax Attenuation Loss and Antenna Gain Calculator

Bob Ballard
 

Thank you Wayne and Mike for the mathematics and reference text clarifications.

I’ll replace the use of the term “Power Factor” and replace it with something more explanatory and work on adding an SWR option.

 

From: wc5c@groups.io <wc5c@groups.io> On Behalf Of Michael Heusser, kl7sg
Sent: Friday, September 7, 2018 10:01 AM
To: wc5c@groups.io
Subject: Re: [wc5c] Coax Attenuation Loss and Antenna Gain Calculator

 

Great answer.

 

You might consider briefly explaining the power factor as you have done here.  Something like “actual antenna gain not in decibels”.   Normally, in electronics, power factor is a number between -1 and +1, and it is related to the real power vs the apparent power  (the phase difference between voltage and current).

 

I have attached a document concerning return loss by Steve Stearns, K6OIK.  I think page 37 has the equations you need.

 

 

 

Thanks for taking the time to answer my questions.

 

Mike

 

Sent from Mail for Windows 10

 

From: Wayne Morris
Sent: Friday, September 7, 2018 9:36 AM
To: wc5c@groups.io
Subject: Re: [wc5c] Coax Attenuation Loss and Antenna Gain Calculator

 

Here is a formula for Excel for the mismatch loss where VSWR is the name of the cell containing the vswr value:

 

=-10*(LOG10(1-(((VSWR-1)/(VSWR+1))^2)))

 

 

From: wc5c@groups.io <wc5c@groups.io> On Behalf Of Bob Ballard
Sent: Thursday, September 6, 2018 8:35 PM
To: wc5c@groups.io
Subject: Re: [wc5c] Coax Attenuation Loss and Antenna Gain Calculator

 

  1. The Power Factor is derived this way - the antenna’s stated gain in decibels divided by 10 which creates the number to use as the exponent of 10.  For the example in the worksheet the formula is as follows (the @ freq. just reflects that the antennas gain in decibels should be considered at a given frequency):

The antenna’s gain is 3.5 dB / 10 = .35 which is then applied as the exponent of 10 (i.e., 10.35 = 2.23872) which is the Power Factor.  The Power Factor is multiplied times the watts getting to the antenna.  After coax losses, the watts getting to the example antenna is 63.39 Watts.  The 63.39 * 2.23872 = 141.9058 Watts Effective Radiated Power.

 

  1. No SWR is considered in this formula and the main reason why I put (assuming no other losses).  My understanding is that an SWR of 1.5:1 results in the antenna receiving approximately 97% of the input power.  If you have a straightforward SWR formula I could plug into the model, let me know and I’ll add that.

 

From: wc5c@groups.io <wc5c@groups.io> On Behalf Of Michael Heusser, kl7sg
Sent: Thursday, September 6, 2018 12:49 PM
To: wc5c@groups.io
Subject: Re: [wc5c] Coax Attenuation Loss and Antenna Gain Calculator

 

Hi Bob,

 

How do you define “ Antenna’s gain (@ Freq) power factor”?

Also, have you accounted for the standing wave ratio?

 

Mike

 

Sent from Mail for Windows 10

 

From: Bob Ballard
Sent: Thursday, September 6, 2018 11:21 AM
To: wc5c@groups.io; w5pc@groups.io; w5sh@groups.io
Subject: [wc5c] Coax Attenuation Loss and Antenna Gain Calculator

 

Many online sites can be found to do these calculations but I built one for myself with Excel and decided to share it with any interested.

 

 

 


Re: Coax Attenuation Loss and Antenna Gain Calculator

Michael Heusser, kl7sg
 

Great answer.

 

You might consider briefly explaining the power factor as you have done here.  Something like “actual antenna gain not in decibels”.   Normally, in electronics, power factor is a number between -1 and +1, and it is related to the real power vs the apparent power  (the phase difference between voltage and current).

 

I have attached a document concerning return loss by Steve Stearns, K6OIK.  I think page 37 has the equations you need.

 

 

 

Thanks for taking the time to answer my questions.

 

Mike

 

Sent from Mail for Windows 10

 

From: Wayne Morris
Sent: Friday, September 7, 2018 9:36 AM
To: wc5c@groups.io
Subject: Re: [wc5c] Coax Attenuation Loss and Antenna Gain Calculator

 

Here is a formula for Excel for the mismatch loss where VSWR is the name of the cell containing the vswr value:

 

=-10*(LOG10(1-(((VSWR-1)/(VSWR+1))^2)))

 

 

From: wc5c@groups.io <wc5c@groups.io> On Behalf Of Bob Ballard
Sent: Thursday, September 6, 2018 8:35 PM
To: wc5c@groups.io
Subject: Re: [wc5c] Coax Attenuation Loss and Antenna Gain Calculator

 

  1. The Power Factor is derived this way - the antenna’s stated gain in decibels divided by 10 which creates the number to use as the exponent of 10.  For the example in the worksheet the formula is as follows (the @ freq. just reflects that the antennas gain in decibels should be considered at a given frequency):

The antenna’s gain is 3.5 dB / 10 = .35 which is then applied as the exponent of 10 (i.e., 10.35 = 2.23872) which is the Power Factor.  The Power Factor is multiplied times the watts getting to the antenna.  After coax losses, the watts getting to the example antenna is 63.39 Watts.  The 63.39 * 2.23872 = 141.9058 Watts Effective Radiated Power.

 

  1. No SWR is considered in this formula and the main reason why I put (assuming no other losses).  My understanding is that an SWR of 1.5:1 results in the antenna receiving approximately 97% of the input power.  If you have a straightforward SWR formula I could plug into the model, let me know and I’ll add that.

 

From: wc5c@groups.io <wc5c@groups.io> On Behalf Of Michael Heusser, kl7sg
Sent: Thursday, September 6, 2018 12:49 PM
To: wc5c@groups.io
Subject: Re: [wc5c] Coax Attenuation Loss and Antenna Gain Calculator

 

Hi Bob,

 

How do you define “ Antenna’s gain (@ Freq) power factor”?

Also, have you accounted for the standing wave ratio?

 

Mike

 

Sent from Mail for Windows 10

 

From: Bob Ballard
Sent: Thursday, September 6, 2018 11:21 AM
To: wc5c@groups.io; w5pc@groups.io; w5sh@groups.io
Subject: [wc5c] Coax Attenuation Loss and Antenna Gain Calculator

 

Many online sites can be found to do these calculations but I built one for myself with Excel and decided to share it with any interested.

 

 

 


Re: Coax Attenuation Loss and Antenna Gain Calculator

Wayne Morris - AC5V
 

Here is a formula for Excel for the mismatch loss where VSWR is the name of the cell containing the vswr value:

 

=-10*(LOG10(1-(((VSWR-1)/(VSWR+1))^2)))

 

 

From: wc5c@groups.io <wc5c@groups.io> On Behalf Of Bob Ballard
Sent: Thursday, September 6, 2018 8:35 PM
To: wc5c@groups.io
Subject: Re: [wc5c] Coax Attenuation Loss and Antenna Gain Calculator

 

  1. The Power Factor is derived this way - the antenna’s stated gain in decibels divided by 10 which creates the number to use as the exponent of 10.  For the example in the worksheet the formula is as follows (the @ freq. just reflects that the antennas gain in decibels should be considered at a given frequency):

The antenna’s gain is 3.5 dB / 10 = .35 which is then applied as the exponent of 10 (i.e., 10.35 = 2.23872) which is the Power Factor.  The Power Factor is multiplied times the watts getting to the antenna.  After coax losses, the watts getting to the example antenna is 63.39 Watts.  The 63.39 * 2.23872 = 141.9058 Watts Effective Radiated Power.

 

  1. No SWR is considered in this formula and the main reason why I put (assuming no other losses).  My understanding is that an SWR of 1.5:1 results in the antenna receiving approximately 97% of the input power.  If you have a straightforward SWR formula I could plug into the model, let me know and I’ll add that.

 

From: wc5c@groups.io <wc5c@groups.io> On Behalf Of Michael Heusser, kl7sg
Sent: Thursday, September 6, 2018 12:49 PM
To: wc5c@groups.io
Subject: Re: [wc5c] Coax Attenuation Loss and Antenna Gain Calculator

 

Hi Bob,

 

How do you define “ Antenna’s gain (@ Freq) power factor”?

Also, have you accounted for the standing wave ratio?

 

Mike

 

Sent from Mail for Windows 10

 

From: Bob Ballard
Sent: Thursday, September 6, 2018 11:21 AM
To: wc5c@groups.io; w5pc@groups.io; w5sh@groups.io
Subject: [wc5c] Coax Attenuation Loss and Antenna Gain Calculator

 

Many online sites can be found to do these calculations but I built one for myself with Excel and decided to share it with any interested.

 

 


Re: Coax Attenuation Loss and Antenna Gain Calculator

Wayne Morris - AC5V
 

Source:

 

https://www.everythingrf.com/rf-calculators/vswr-calculator

 

r is the reflection coefficient

RL is the return loss

ML is the mismatch loss.

 

 

 

From: wc5c@groups.io <wc5c@groups.io> On Behalf Of Bob Ballard
Sent: Thursday, September 6, 2018 8:35 PM
To: wc5c@groups.io
Subject: Re: [wc5c] Coax Attenuation Loss and Antenna Gain Calculator

 

  1. The Power Factor is derived this way - the antenna’s stated gain in decibels divided by 10 which creates the number to use as the exponent of 10.  For the example in the worksheet the formula is as follows (the @ freq. just reflects that the antennas gain in decibels should be considered at a given frequency):

The antenna’s gain is 3.5 dB / 10 = .35 which is then applied as the exponent of 10 (i.e., 10.35 = 2.23872) which is the Power Factor.  The Power Factor is multiplied times the watts getting to the antenna.  After coax losses, the watts getting to the example antenna is 63.39 Watts.  The 63.39 * 2.23872 = 141.9058 Watts Effective Radiated Power.

 

  1. No SWR is considered in this formula and the main reason why I put (assuming no other losses).  My understanding is that an SWR of 1.5:1 results in the antenna receiving approximately 97% of the input power.  If you have a straightforward SWR formula I could plug into the model, let me know and I’ll add that.

 

From: wc5c@groups.io <wc5c@groups.io> On Behalf Of Michael Heusser, kl7sg
Sent: Thursday, September 6, 2018 12:49 PM
To: wc5c@groups.io
Subject: Re: [wc5c] Coax Attenuation Loss and Antenna Gain Calculator

 

Hi Bob,

 

How do you define “ Antenna’s gain (@ Freq) power factor”?

Also, have you accounted for the standing wave ratio?

 

Mike

 

Sent from Mail for Windows 10

 

From: Bob Ballard
Sent: Thursday, September 6, 2018 11:21 AM
To: wc5c@groups.io; w5pc@groups.io; w5sh@groups.io
Subject: [wc5c] Coax Attenuation Loss and Antenna Gain Calculator

 

Many online sites can be found to do these calculations but I built one for myself with Excel and decided to share it with any interested.

 

 

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