Arrow Stacking? Technical Advice needed.

kd4iz＠frawg.org

29 May 2021 29 May '21

12:59 p.m.

All,

I happen to have a pair of the Arrow II handheld SAT antennas available. I wish to use them as a pair set up in crossed polarization. To those who have messed around with various light antenna combinations and have used a pair of Arrows, please let me know your experiences what worked and what did not. Since each antenna has a single 2m and 70cm yagi on it, connecting the 2 element sets will be a little more challenging than one would find for a single band crossed polarized yagi.

Obviously one will be set with the 2m elements vert, the other horizontal. So:

How have you connected them?

What transmission line harness lengths did you use?

Was RH or LH polarization a consideration?

Was you experiment a satisfactory arrangement?

I am going to take the stock 10W diplexers out of line and use something a little more robust to prevent desense and handle more than 10W.

I am really not interested in hearing about other antennas. I don't need to be persuaded or dissuaded to do anything else. I have currently have limited resources to put into this, so jumping off the deep end and buying an M2 Leo kit (or even a "crushcraft" pair) is not in the cards.

Thanks in advance for sharing your experience.

Jack Spitznagel - KD4IZ

Assistant Editor - AMSAT News Service

Cell: (410) 207-5123

kd4iz@arrl.net

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crohtun

29 May 29 May

1:06 p.m.

Jack, Haven’t done it but definitely thinking about it. You may alrady be familiar with the May/June 2014 issue of the AMSAT Journal where Mark Spencer wrote up this arrangement. 73, RayKN2K

Sent from the all new AOL app for iOS

On Saturday, May 29, 2021, 4:00 PM, kd4iz@frawg.org kd4iz@frawg.org wrote:

All,

Obviously one will be set with the 2m elements vert, the other horizontal. So:

How have you connected them?

What transmission line harness lengths did you use?

Was RH or LH polarization a consideration?

Was you experiment a satisfactory arrangement?

I am going to take the stock 10W diplexers out of line and use something a little more robust to prevent desense and handle more than 10W.

I am really not interested in hearing about other antennas… I don’t need to be persuaded or dissuaded to do anything else. I have currently have limited resources to put into this, so jumping off the deep end and buying an M2 Leo kit (or even a “crushcraft” pair) is not in the cards.

Thanks in advance for sharing your experience.

Jack Spitznagel – KD4IZ

Assistant Editor – AMSAT News Service

Cell: (410) 207-5123

kd4iz@arrl.net

-----------------------------------------------------------

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Jim Walls

1:23 p.m.

On 05/29/2021 12:59, kd4iz@frawg.org wrote:

...

I happen to have a pair of the Arrow II handheld SAT antennas available. I wish to use them as a pair set up in crossed polarization. To those who have messed around with various light antenna combinations and have used a pair of Arrows, please let me know your experiences what worked and what did not. Since each antenna has a single 2m and 70cm yagi on it, connecting the 2 element sets will be a little more challenging than one would find for a single band crossed polarized yagi.

I may not be the expert here, but as I understand it, that is not going to work the way you think it will. As I understand it, the two antennas need to be on the same boom to get the circular wavefront.

Now what you could do is orient them 90 degrees to each other and have an antenna switch so you could easily switch from horizontal to vertical. I would split the feeds for 2M vs 430 so each band would be selectable for polarization.

-- 73 ------------------------------------- Jim Walls - K6CCC jim@k6ccc.org Ofc: 818-548-4804 http://members.dslextreme.com/users/k6ccc/ AMSAT Member 32537 - WSWSS Member 395

Robert Mattaliano

1:35 p.m.

Jack,

I use a pair of custom Alaskan Arrows. Solid elements. H/V switched by relays.

Have not tried CP and RH versus LH phasing as more complicated with phasing lines. You might refer to the example from Mark, WA8SME.

https://www.amsat.org/wordpress/xtra/WRAPSArticlewithStoreAd.pdf

Gl,

Bob N6RFM

...

On May 29, 2021, at 16:01, kd4iz@frawg.org wrote:

All,

I happen to have a pair of the Arrow II handheld SAT antennas available. I wish to use them as a pair set up in crossed polarization. To those who have messed around with various light antenna combinations and have used a pair of Arrows, please let me know your experiences what worked and what did not. Since each antenna has a single 2m and 70cm yagi on it, connecting the 2 element sets will be a little more challenging than one would find for a single band crossed polarized yagi.

Obviously one will be set with the 2m elements vert, the other horizontal. So: How have you connected them? What transmission line harness lengths did you use? Was RH or LH polarization a consideration? Was you experiment a satisfactory arrangement?

I am going to take the stock 10W diplexers out of line and use something a little more robust to prevent desense and handle more than 10W.

I am really not interested in hearing about other antennas… I don’t need to be persuaded or dissuaded to do anything else. I have currently have limited resources to put into this, so jumping off the deep end and buying an M2 Leo kit (or even a “crushcraft” pair) is not in the cards.

Thanks in advance for sharing your experience.

Jack Spitznagel – KD4IZ Assistant Editor – AMSAT News Service Cell: (410) 207-5123 kd4iz@arrl.net

Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Acceptable Use and Privacy Policies available at https://www.amsat.org/about-amsat/

View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/amsat-bb@amsat.org To unsubscribe send an email to amsat-bb-leave(a)amsat.org Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org

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crohtun
Jim Walls
kd4iz＠frawg.org
Robert Mattaliano