SnappyPortableDipoleAntenna

“Snappy”…A Band Switching Portable Dipole  by Clair Cessna, K6LG

Since I enjoy outdoor operating activities, QRP events, Field Day, and others, I needed an antenna which could be thrown in a backpack,  quickly deployed, and easily used on several HF bands.  A segmented dipole was put together, using bullet connector “switches” across insulators to change bands… reducing the necessity of using an antenna tuner.

The antenna is usually configured as an inverted Vee supported in the center at about 16 feet, using a SD-20, 20 foot, telescoping, fishing pole. Alternatively, it can be suspended from a tree branch. The ends are usually near ground level or supported by bushes, trees, rocks, etc.

“Band switching” for the five bands is simply a matter of shorting across selected insulators to adjust the antenna, using the bullet connector shorters (switches.) Since the antenna is usually relatively close to the ground, or can be easily lowered from the ends to clothesline height, one can rapidly walk along, and change the antenna length.

Materials needed for construction: Forty feet of #16 or #22 plastic jacketed speaker wire (Lowes or Home Depot); small sheet of one-eighth inch thick Lucite or other plastic for insulators, ten bullet or spade connectors (Radio Shack), piece of quarter inch thick plastic, two inches square, SO-239 connector.

Cut to the lengths shown below, but add 3 inches to each for connecting through the insulators. Since you will be unzipping the speaker wire later, both sides of the antenna will be the same for each segment. Strip an inch and a half off the ends of each segment and insert the insulators. Solder short leads to the male and female parts of the bullet connectors and solder in place across each insulator, leaving enough slack so they can be easily plugged in or unplugged. (I prefer the bullet connectors since they are easier for my fingers to manipulate.)

Measurements beginning from the center (middle of insulator to middle of next 2” insulator) should be 12‘ 7“, 3‘ 6“, 6‘ 0“,  9‘ 1“, 1‘ 7“. (Remember to add 3″ to each of these lengths for attaching to insulators and bullet connectors.) These measurements are for 17, 20, 30, 40/15M, and cut for the low end of these bands. Notice that for 15M the entire antenna length is used. The 1′ 6” end section is used on 40/15M to facilitate matches on those bands depending on whether the end of the dipole is staked to the ground or elevated in a tree. The antenna is fed with RG-58 coax. No balun is used.

 Generally these measurements provide a satisfactory match.  Of course in the field, antenna height, configuration, and environment may sometimes be different, so, when possible, I carry an MFJ Tiny Travel Tuner to deal with any variations. 

The “Snappy” is a snap to build, and to set up in the field. For band changes, just snap or unsnap the connectors!

de Clair Cessna K6LG 8-22-2011

T-Hunt Attenuator

This schematic was drawn up by Phil – KJ6KE

An attenuator is an electronic device that reduces the power of a signal without appreciably distorting its waveform. (From Wikipedia)

This device is used during a t-hunt when the fox transmitter is close by and all the radio can hear from all angles is the beacon.  The signal is diminished to a point where the directional antenna can be used again to find the hidden transmitter.

Field Day 2020

Riverside County Amateur Radio Association Field Day 2020

Here is the picture slideshow from Field Day 2020

  • RCARA Members and visitors pause for a pic along side a VW Bus
  • Moving the supplies and equipment from the parking lot
  • Juan KM6CFH packing in his portable rig
  • A new battery technology was introduced at FD this year.
  • For 2020, there was no line power in out location for even non-radio gear. Battery and solar powered the show this year!
  • Power management in a box with power pole connectors and a built in volt meter.
  • Rick KK6CTT - large battery box and solar panels included an inverter which provided line power for laptops and HT & Cellphone charging.
  • John W7RSO operating under an EZ-UP, socially distanced but racking up the QSO numbers
  • John W7RSO came wearing his FD 2020 hat.
  • APRS Map showing that Alan KM6KPW is at the park
  • An APRS controller with GPS and simple telemetry. This module uses a Baofeng UV-5R type of HT for it's transmitter and receiver.
  • An APRS controller with GPS and simple telemetry. This module uses a Baofeng UV-5R type of HT for it's transmitter and receiver.
  • Steven W7DTH brought out his shelter and portable rig
  • Steven W7DTH displays a clean power distribution module. LED indicators and fuses are a great features.
  • Field Day is great to see what others are using in their portable and mobile rigs
  • Just waiting for the 11:00 AM whistle to start making contacts
  • Our newest Extra class operator making contacts. Congrats to Juan AJ6PH !!
  • Juan finding the balance between sun for the solar panel and shade for the operator
  • Alan KM6KPW ran 10M FT8 on 15 watts QRP power.
  • Alan KM6KPW on the Xiegu working FT8 on 10 meters. The band was like a revolving door
  • John W7RSO brought out the hitch mounted extending mast antenna.
  • A close up of John W7RSO's trailer hitch mast mount
  • Alan KM6KPW brought out a 10 meter dipole that fits into the go bag.
  • Rails to save the face and rear connectors of his mobile transceiver. Lite and solid, nice!
  • All gathered around the picnic table
  • Both the US flag and our ARRL FD mascot on display in front of the pavillion


Updated Q&A from the ARRL about club totals – (PDF or Original Article)

Members operating from home, please remember to include “RIVERSIDE COUNTY AMATEUR RADIO ASSOCIATION” (NOT “RCARA” or “W6TJ”) on your submission.  See the ARRL COVID-19 2020 Waver document for more information

 

 

We may have to be away from each other but that does not mean we have to be out of reach!

Stay Safe and keep making contacts!

Remote VE Testing Information

During the 2020 COVID-19 isolation lockdown the Ham Radio community has seen the need to continue with VE testing.  New licensees testing for their Tech license as well as those upgrading their license ticket while they have time to study.

The Greater Los Angeles Amateur Radio Group VEC has created a protocol for VE remote testing.  Below are two documents contributed by our members that are VE’s participating in the GLARG testing:

Remote VE Testing  Short Overview and the Long Version

Study hard and when you are ready to test, get on the GLARG’s calendar.

 

Thank you to Doug (KK6D) and Jim (AG6EA) for filling in the blanks!

First ‘Meeting on the Air’ success

To the RCARA members,

Holy cow, we did it!  This thing really worked!

Thank you all who made this “Meeting on the Air” a success.  We had a good working check in round and an even better round of discussion about the 2020 Field Day.  The discussion for all the ideas worked out great with members contributing to all sides of Field Day in world where we all have to live in our own isolation bubble. 

I want to say a sincere “Thank You” to the members that pointed out the faults and flaws in some of the ideas brought up – “It’s easy to stay quiet and go with the flow but pointing out the bad idea and why it’s a bad idea is honestly just as important.  Sometimes more so.”

Thank you Rick KK6CTT for turning the “Parking Lot Picnic” into the “Mobile Simplex Breakfast“.  You turned a good intentioned idea into a working Ham Radio exercise that we can still keep as a social event within the club.  Please join us this Saturday (Apr 11, 2020) for breakfast in your driveway!

73!

Alan KM6KPW

Simplex Social Brunch Net

New time for this Net is 11:30 AM

Formerly the Simplex Social Breakfast Net, the Net Controller for this net has had to move the time up from its original time slot so much that we’re just going to call it a Brunch Net…

Please join us on the third Saturday of the month for a for a social simplex breakfast Net!  Grab your coffee and bagel or other breakfast items, get on your rig and be social!  Our original Net plan is to be a round robin Net with relays from operators that are able to hear a weak signal and pass on the traffic where possible.

This Net will be a once a month Saturday morning Net to hone your Amateur Radio skills in Simplex communications.  The frequency being used will rotate from month to month, please see the frequency plan below. 

 


Take a break, grab your coffee and join us on the air!

 

When: The third Saturday of the month at 11:30 AM

Where: Your choice

How: Simplex mode – No offset / No PL tone / No Squelch 

Send topic suggestions to: km6kpw @ scrnet.com

 

Monthly Frequency Plan

Month Band Frequency Coordinator
January 70 CM 446.00 Mhz Alan KM6KPW
February 2 M 147.510 Mhz Alan KM6KPW
March 70 CM 446.00 Mhz Alan KM6KPW
April 2 M 147.510 Mhz Alan KM6KPW
May 70 CM 446.00 Mhz Alan KM6KPW
June 2 M 147.510 Mhz Alan KM6KPW
July 70 CM 446.00 Mhz Alan KM6KPW
August 2 M 147.510 Mhz Alan KM6KPW
September 70 CM 446.00 Mhz Alan KM6KPW
October 2 M 147.510 Mhz Alan KM6KPW
November 70 CM 446.00 Mhz Alan KM6KPW
December 2 M 147.510 Mhz Alan KM6KPW

Additional Net Coordinators are needed!  If you are interested in hosting a net, please notify Alan (KM6KPW) or any other Board member know.

 

Club Officers for the year 2020

Riverside County Amateur Radio Association

Elected Officers for the Year 2020

 

Alan Serl KM6KPW

President

km6kpw @ scrnet.com

Mike Yasmer KM6LOR

Vice-President

coyotegrad @ gmail.com

Jim Wiley AG6EA

Treasurer

jameswiley757 @ gmail.com

Margaret Albanese KC6UDH

Secretary

malbanese @ dslextreme.com

 

Ron Braley KE6RYX

Director of Communications

(951) 369-5149

 

Marlene KK6CTX

Director of Membership

xmadamxx @ aol.com

Appointed Positions for 2020

Pending

Sunshine Chair

Rick Schirmer KK6CTT

Photographer

rngr86 @ juno.com

Alan Serl KM6KPW

Webmaster

km6kpw @ scrnet.com