Feeding M2 Eggbeaters

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Mike Lucas

14 Jan 2021 14 Jan '21

8 a.m.

Friend of mine just got a M2 Eggbeater SatPack 1setup for VHF/UHF.

His rig covers both bands however only has a PL259 output so he's wondering how to feed those antennas with one feedline up to the boom. Is there an RF switched coax relay box or something else that will maybe work? I've always had radios with 2 RF coax outputs on the radio, then run 2 lines up to the tower & each antenna.

I told him I'd post on here to see what feedback I got.

Thanks

Mike N7ASZ

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KENT BRITAIN

14 Jan 14 Jan

8:10 a.m.

Several companies make a VHF/UHF Diplexer. The 145/435 MHz signals are split in filters. Kent WA5VJB On Thursday, January 14, 2021, 01:02:21 AM CST, Mike Lucas documike@comcast.net wrote:

Friend of mine just got a M2 Eggbeater SatPack 1setup for VHF/UHF.

His rig covers both bands however only has a PL259 output so he’s wondering how to feed those antennas with one feedline up to the boom. Is there an RF switched coax relay box or something else that will maybe work? I’ve always had radios with 2 RF coax outputs on the radio, then run 2 lines up to the tower & each antenna.

I told him I’d post on here to see what feedback I got.

Thanks

Mike N7ASZ

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

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KENT BRITAIN

8:29 a.m.

How are his construction skills? Here is the diagram for an easy to build 145-435 MHzsplitter/diplexer. http://www.wa5vjb.com/references/Cheap%20Antennas-LEOs.pdf Can be built as shown, or in a metal box with connectors.It would even be possible to locate the diplexer near the antenna, then he would onlyhave one long coax run. 73 Kent WA5VJB On Thursday, January 14, 2021, 01:11:11 AM CST, KENT BRITAIN wa5vjb@flash.net wrote:

Several companies make a VHF/UHF Diplexer. The 145/435 MHz signals are split in filters. Kent WA5VJB On Thursday, January 14, 2021, 01:02:21 AM CST, Mike Lucas documike@comcast.net wrote:

Friend of mine just got a M2 Eggbeater SatPack 1setup for VHF/UHF.

I told him I’d post on here to see what feedback I got.

Thanks

Mike N7ASZ

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

John Fritze

3:02 p.m.

Comet also makes a couple splitters. I have used one for many years for my VHF/UHF vertical to hook into the back of my Kenwood V71 which has separate ports for VHF and UHF. The only reason I suggest them is because you can hardly buy the parts for the cost of one of these units.

On Thu, Jan 14, 2021 at 2:29 AM KENT BRITAIN wa5vjb@flash.net wrote:

...

How are his construction skills? Here is the diagram for an easy to build 145-435 MHz splitter/diplexer. http://www.wa5vjb.com/references/Cheap%20Antennas-LEOs.pdf

Can be built as shown, or in a metal box with connectors. It would even be possible to locate the diplexer near the antenna, then he would only have one long coax run. 73 Kent WA5VJB

On Thursday, January 14, 2021, 01:11:11 AM CST, KENT BRITAIN < wa5vjb@flash.net> wrote:

Several companies make a VHF/UHF Diplexer. The 145/435 MHz signals are split in filters.

Kent WA5VJB

On Thursday, January 14, 2021, 01:02:21 AM CST, Mike Lucas < documike@comcast.net> wrote:

Friend of mine just got a M2 Eggbeater SatPack 1setup for VHF/UHF.

His rig covers both bands however only has a PL259 output so he’s wondering how to feed those antennas with one feedline up to the boom. Is there an RF switched coax relay box or something else that will maybe work? I’ve always had radios with 2 RF coax outputs on the radio, then run 2 lines up to the tower & each antenna.

I told him I’d post on here to see what feedback I got.

Thanks

Mike N7ASZ

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. Not an AMSAT-NA member? Join now to support the amateur satellite program!

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

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. Not an AMSAT-NA member? Join now to support the amateur satellite program!

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

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. Not an AMSAT-NA member? Join now to support the amateur satellite program!

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

-- John Fritze Jr K2QY k2qy@arrl.org ENY Section Manager Twitter: @k2qy 401 261 4996 (cell)

Fred Hillhouse

4:05 p.m.

Hi Kent,

How much power would you expect the design in the PDF to handle?

Note: This is not to imply I am using high power into a satellite.

I made a “break-down” version of the Cheap-LEO. It still needs some refinements, such as shedding weight.

Thank you!

Fred N7FMH

From: KENT BRITAIN [mailto:wa5vjb@flash.net] Sent: Thursday, January 14, 2021 2:29 AM To: amsat-bb@amsat.org; Mike Lucas Subject: [AMSAT-BB] Re: Feeding M2 Eggbeaters

How are his construction skills? Here is the diagram for an easy to build 145-435 MHz

splitter/diplexer. http://www.wa5vjb.com/references/Cheap%20Antennas-LEOs.pdf

Can be built as shown, or in a metal box with connectors.

It would even be possible to locate the diplexer near the antenna, then he would only

have one long coax run. 73 Kent WA5VJB

On Thursday, January 14, 2021, 01:11:11 AM CST, KENT BRITAIN wa5vjb@flash.net wrote:

Several companies make a VHF/UHF Diplexer. The 145/435 MHz signals are split in filters.

Kent WA5VJB

On Thursday, January 14, 2021, 01:02:21 AM CST, Mike Lucas documike@comcast.net wrote:

Friend of mine just got a M2 Eggbeater SatPack 1setup for VHF/UHF.

I told him I’d post on here to see what feedback I got.

Thanks

Mike N7ASZ

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

-- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

KENT BRITAIN

4:17 p.m.

Hi Fred: All depends on the voltage breakdown rating of the 4.7 and 10 pf caps.Something like Silver Mica's with 100+ voltage ratings should be good to 100 watts or so.Some 1000 volt doorknobs, close to a KW. Regarding your breakdown version. One backpacker made his out of soft wire. He kind of wands it up and stuffs it in his backpack. When he gets to his hilltop, he 'unwads' the antenna and straightens out of elements. Says they are good for about a half dozen waddings, then he makes a new one.73 Kent WA5VJB

On Thursday, January 14, 2021, 09:07:02 AM CST, Fred Hillhouse fmhillhouse@comcast.net wrote:

Hi Kent,

How much power would you expect the design in the PDF to handle?

Note: This is not to imply I am using high power into a satellite.

I made a “break-down” version of the Cheap-LEO. It still needs some refinements, such as shedding weight.

Thank you!

Fred N7FMH

From: KENT BRITAIN [mailto:wa5vjb@flash.net] Sent: Thursday, January 14, 2021 2:29 AM To: amsat-bb@amsat.org; Mike Lucas Subject: [AMSAT-BB] Re: Feeding M2 Eggbeaters

How are his construction skills? Here is the diagram for an easy to build 145-435 MHz

splitter/diplexer. http://www.wa5vjb.com/references/Cheap%20Antennas-LEOs.pdf

Can be built as shown, or in a metal box with connectors.

It would even be possible to locate the diplexer near the antenna, then he would only

have one long coax run. 73 Kent WA5VJB

On Thursday, January 14, 2021, 01:11:11 AM CST, KENT BRITAIN wa5vjb@flash.net wrote:

Several companies make a VHF/UHF Diplexer. The 145/435 MHz signals are split in filters.

Kent WA5VJB

On Thursday, January 14, 2021, 01:02:21 AM CST, Mike Lucas documike@comcast.net wrote:

Friend of mine just got a M2 Eggbeater SatPack 1setup for VHF/UHF.

I told him I’d post on here to see what feedback I got.

Thanks

Mike N7ASZ

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

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

Leffke, Zachary

4:45 p.m.

Hi Folks, Not sure if it helps, but it’s certainly related. A while back I did a simple EagleCAD layout for a microdiplexer (very similar to the diplexer that comes with the Arrow, based on the KI0AG design) that uses 0805 surface mount components. Cost for 3 boards from Osh Park is around $5.00 (not counting the caps/inductors and connectors that would be needed, listed in the BOM).

https://github.com/zleffke/micro_diplexer

There are two variants in the repo, one for edge launch SMA connectors, one for through hole SMA connectors (or coax pigtails if desired). If memory serves, with the components in the BOM, the board can handle roughly 10W of RF or so on TX (though at the time when I built them, my project was RX only….so I haven’t actually tested the TX RF power handling capability). There is also a QUCS simulation in the repo if that’s of interest for folks.

-Zach, KJ4QLP -- Research Associate Aerospace & Ocean Systems Lab Ted & Karyn Hume Center for National Security & Technology Virginia Polytechnic Institute & State University Work Phone: 540-231-4174 Cell Phone: 540-808-6305

From: KENT BRITAIN wa5vjb@flash.net Sent: Thursday, January 14, 2021 10:18 AM To: amsat-bb@amsat.org; Fred Hillhouse fmhillhouse@comcast.net Subject: [AMSAT-BB] Re: Feeding M2 Eggbeaters

Hi Fred:

All depends on the voltage breakdown rating of the 4.7 and 10 pf caps. Something like Silver Mica's with 100+ voltage ratings should be good to 100 watts or so. Some 1000 volt doorknobs, close to a KW.

Regarding your breakdown version. One backpacker made his out of soft wire. He kind of wands it up and stuffs it in his backpack. When he gets to his hilltop, he 'unwads' the antenna and straightens out of elements. Says they are good for about a half dozen waddings, then he makes a new one. 73 Kent WA5VJB

On Thursday, January 14, 2021, 09:07:02 AM CST, Fred Hillhouse <fmhillhouse@comcast.netmailto:fmhillhouse@comcast.net> wrote:

Hi Kent,

How much power would you expect the design in the PDF to handle?

Note: This is not to imply I am using high power into a satellite.

I made a “break-down” version of the Cheap-LEO. It still needs some refinements, such as shedding weight.

Thank you!

Fred N7FMH

From: KENT BRITAIN [mailto:wa5vjb@flash.net] Sent: Thursday, January 14, 2021 2:29 AM To: amsat-bb@amsat.orgmailto:amsat-bb@amsat.org; Mike Lucas Subject: [AMSAT-BB] Re: Feeding M2 Eggbeaters

How are his construction skills? Here is the diagram for an easy to build 145-435 MHz

splitter/diplexer. http://www.wa5vjb.com/references/Cheap%20Antennas-LEOs.pdf

Can be built as shown, or in a metal box with connectors.

It would even be possible to locate the diplexer near the antenna, then he would only

have one long coax run. 73 Kent WA5VJB

On Thursday, January 14, 2021, 01:11:11 AM CST, KENT BRITAIN <wa5vjb@flash.netmailto:wa5vjb@flash.net> wrote:

Several companies make a VHF/UHF Diplexer. The 145/435 MHz signals are split in filters.

Kent WA5VJB

On Thursday, January 14, 2021, 01:02:21 AM CST, Mike Lucas <documike@comcast.netmailto:documike@comcast.net> wrote:

Friend of mine just got a M2 Eggbeater SatPack 1setup for VHF/UHF.

I told him I’d post on here to see what feedback I got.

Thanks

Mike N7ASZ

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

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This email has been checked for viruses by Avast antivirus software. www.avast.comhttps://www.avast.com/antivirus

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

Martin Cooper

5:17 p.m.

Along the same lines as Zach's board, there is another KI0AG implementation from KW4FB that uses 1206 and 1008 components, slightly larger than the 0805 ones used on Zach's board. I built one of these (boards also available on OSH Park) as my first SMD project, and it turned out to be rather easier than I'd anticipated. This one is designed for use without connectors on the board. And yes, good for 10W.

http://kw4fb.com/micro-diplexer/

Martin. KD6YAM

On Thu, Jan 14, 2021 at 7:47 AM Leffke, Zachary zleffke@vt.edu wrote:

...

Hi Folks,

Not sure if it helps, but it’s certainly related. A while back I did a simple EagleCAD layout for a microdiplexer (very similar to the diplexer that comes with the Arrow, based on the KI0AG design) that uses 0805 surface mount components. Cost for 3 boards from Osh Park is around $5.00 (not counting the caps/inductors and connectors that would be needed, listed in the BOM).

https://github.com/zleffke/micro_diplexer

There are two variants in the repo, one for edge launch SMA connectors, one for through hole SMA connectors (or coax pigtails if desired). If memory serves, with the components in the BOM, the board can handle roughly 10W of RF or so on TX (though at the time when I built them, my project was RX only….so I haven’t actually tested the TX RF power handling capability). There is also a QUCS simulation in the repo if that’s of interest for folks.

-Zach, KJ4QLP

--

Research Associate

Aerospace & Ocean Systems Lab

Ted & Karyn Hume Center for National Security & Technology

Virginia Polytechnic Institute & State University

Work Phone: 540-231-4174

Cell Phone: 540-808-6305

*From:* KENT BRITAIN wa5vjb@flash.net *Sent:* Thursday, January 14, 2021 10:18 AM *To:* amsat-bb@amsat.org; Fred Hillhouse fmhillhouse@comcast.net *Subject:* [AMSAT-BB] Re: Feeding M2 Eggbeaters

Hi Fred:

All depends on the voltage breakdown rating of the 4.7 and 10 pf caps.

Something like Silver Mica's with 100+ voltage ratings should be good to 100 watts or so.

Some 1000 volt doorknobs, close to a KW.

Regarding your breakdown version. One backpacker made his out of soft wire. He kind of wands it up and stuffs it in his backpack. When he gets to his hilltop, he 'unwads' the antenna and straightens out of elements. Says they are good for about a half dozen waddings, then he makes a new one.

73 Kent WA5VJB

On Thursday, January 14, 2021, 09:07:02 AM CST, Fred Hillhouse < fmhillhouse@comcast.net> wrote:

Hi Kent,

How much power would you expect the design in the PDF to handle?

Note: This is not to imply I am using high power into a satellite.

I made a “break-down” version of the Cheap-LEO. It still needs some refinements, such as shedding weight.

Thank you!

Fred N7FMH

*From:* KENT BRITAIN [mailto:wa5vjb@flash.net wa5vjb@flash.net] *Sent:* Thursday, January 14, 2021 2:29 AM *To:* amsat-bb@amsat.org; Mike Lucas *Subject:* [AMSAT-BB] Re: Feeding M2 Eggbeaters

How are his construction skills? Here is the diagram for an easy to build 145-435 MHz

splitter/diplexer. http://www.wa5vjb.com/references/Cheap%20Antennas-LEOs.pdf

Can be built as shown, or in a metal box with connectors.

It would even be possible to locate the diplexer near the antenna, then he would only

have one long coax run. 73 Kent WA5VJB

On Thursday, January 14, 2021, 01:11:11 AM CST, KENT BRITAIN < wa5vjb@flash.net> wrote:

Several companies make a VHF/UHF Diplexer. The 145/435 MHz signals are split in filters.

Kent WA5VJB

On Thursday, January 14, 2021, 01:02:21 AM CST, Mike Lucas < documike@comcast.net> wrote:

Friend of mine just got a M2 Eggbeater SatPack 1setup for VHF/UHF.

His rig covers both bands however only has a PL259 output so he’s wondering how to feed those antennas with one feedline up to the boom. Is there an RF switched coax relay box or something else that will maybe work? I’ve always had radios with 2 RF coax outputs on the radio, then run 2 lines up to the tower & each antenna.

I told him I’d post on here to see what feedback I got.

Thanks

Mike N7ASZ

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. Not an AMSAT-NA member? Join now to support the amateur satellite program!

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

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. Not an AMSAT-NA member? Join now to support the amateur satellite program!

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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This email has been checked for viruses by Avast antivirus software. www.avast.com https://www.avast.com/antivirus

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. Not an AMSAT-NA member? Join now to support the amateur satellite program!

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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participants (6)

Fred Hillhouse
John Fritze
KENT BRITAIN
Leffke, Zachary
Martin Cooper
Mike Lucas