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Re: How important is it to have a full duplex ht

Clint Bradford
 

Each set of elements on the Arrow Sat Antennas has a connector - usually BNC Female. You can use short cables to attach each to two different radios.



At shows and demos, I will sometimes have two complete "systems" set up: I'll wear a headset and work with one antenna, and another person will be my "spotter" with sat tracking program on an iOS device, and using a tape measure beam to receive-only - about twenty feet away - so that that receive audio doesn't reach my mic and cause feedback.

When using two HTs, you will have to experiment and see if the receive one "de-senses" when the nearby second ratio transmits. You can test this phenomenon on un-used frequencies near the sat's frequencies beforehand.

Radios like the Wouxun KG-UV9D PLUS ( https://www.hamradio.com/detail.cfm?pid=H0-015307 )
and the Kenwood TH-D72a will work full-duplex for you. HWO has an "open box" Wouxun right now - so it it 10% off!

Clint




Re: AMSAT journal

Jerry Rappel
 

Yes thanks. Fine reading.

Jerry WW0E

On Sun, May 3, 2020 at 9:55 AM AF7ZA <billnjoano@...> wrote:
Thanks Clint for posting the link to the Journal. A lengthy but very interesting read, particularly the “For beginners- Amateur Radio Satellite Primer (part IV)" on the characteristics of COAX.

Bill AF7ZA


AMSAT journal

AF7ZA
 

Thanks Clint for posting the link to the Journal. A lengthy but very interesting read, particularly the “For beginners- Amateur Radio Satellite Primer (part IV)" on the characteristics of COAX.

Bill AF7ZA


Re: How important is it to have a full duplex ht

David Spoelstra
 

Take out the Diplexer if you have one. Hook up each radio to the appropriate cable. For AO-91 & AO-92 set the receive frequency on the receive radio and just change the frequency on the transmit radio.

For SO-50 you fix the transmit frequency and just change the receive frequency.


-David, N9KT

On Sun, May 3, 2020 at 9:37 AM Paul Ecker <eckerpw@...> wrote:
So if you don't have a full duplex HT, how does one set up or employ two HTs with an Arrow antenna?

73 Paul w3eck


Re: How important is it to have a full duplex ht

Paul Ecker <eckerpw@...>
 

So if you don't have a full duplex HT, how does one set up or employ two HTs with an Arrow antenna?

73 Paul w3eck


Re: How important is it to have a full duplex ht

David Spoelstra
 

>> ...  On our "easy FM voice sats," you're not changing the 2M frequencies to accommodate for Doppler, are you???

Nope, I use the frequency pairs right off your awesome website! http://work-sat.com/Home_files/FM-VOICE-SATS-03-2020.pdf

-David, N9KT



On Sun, May 3, 2020 at 12:59 AM Clint Bradford via groups.io <clintbradford=mac.com@groups.io> wrote:
>> ...  It's obvious when you need to switch to the next frequency pair.

On our "easy FM voice sats," you're not changing the 2M frequencies to accommodate for Doppler, are you???

>> ... You *know* when you are getting into the bird ..

Absolutely!

>> ... You *know* when someone else is overpowering you into the bird ...

Although you might be tempted to fire up that 65W mobile ... we both KNOW it CAN be done with an HT ...

Good info, David!


Re: How important is it to have a full duplex ht

Clint Bradford
 

>> ...  It's obvious when you need to switch to the next frequency pair.

On our "easy FM voice sats," you're not changing the 2M frequencies to accommodate for Doppler, are you???

>> ... You *know* when you are getting into the bird ..

Absolutely!

>> ... You *know* when someone else is overpowering you into the bird ...

Although you might be tempted to fire up that 65W mobile ... we both KNOW it CAN be done with an HT ...

Good info, David!


Re: How important is it to have a full duplex ht

David Spoelstra
 

What I find most valuable when using full duplex is:
1. It's obvious when you need to switch to the next frequency pair.
2. You *know* when you are getting into the bird. This is actually more important than you think. When I've worked simplex before I've called and called only to find out there was something wrong with my setup.
3. You *know* when someone else is overpowering you into the bird.

But, I have worked the FM birds simplex too.

-David, N9KT



On Sat, May 2, 2020 at 8:16 PM Hank Tyler <tylerhster@...> wrote:
Of course we don't use full duplex on repeaters and it works out well.
What do other people think? Do you use non full duplex hts and think they work well?


Re: How important is it to have a full duplex ht

Clint Bradford
 

To work the "easy FM voice satellites," it is absolutely NOT mandatory to work them 
full-duplex.

BUT - it sure helps hearing your downlink - making sure you are (a) hitting it well and 
(b) not accidentally stepping on someone else!

Treat it like you do your local repeaters: You don't intentionally key up on top of 
someone else. You wait for a break in the action, THEN keep up and announce 
yourself.

Clint K6LCS


How important is it to have a full duplex ht

Hank Tyler
 

to work the fm birds? What’s your opinion?


Re: AMSAT-NA - Website and Journal - New Look!

Jer W
 

Thanks.


On Friday, May 1, 2020, 9:25:39 PM EDT, Clint Bradford via groups.io <clintbradford@...> wrote:


You can save almost $20 on MacDoppler if you are a member of AMSAT-NA.

Order it through the AMSAT-NA online store!

Clint


Re: AMSAT-NA - Website and Journal - New Look!

Jer W
 

If by any chance and have the time, please send me one screen shot
of one of the passes.

Jerry...W8RQM






On Friday, May 1, 2020, 9:22:08 PM EDT, Clint Bradford via groups.io <clintbradford@...> wrote:


>> ... is anyone on Work-Sat groups using MacDoppler ... 

Yes - for MANY years ... since 2006 ...

>> ... doppler shift ... ICOM IC-9700 ...

MacDoppler certainly support the '9700 ... See their Web site and documentation at ...

https://www.dogparksoftware.com/MacDoppler.html


 
MacDoppler: will calculate the position and relative  velocity of the satellites you are tracking and automatically adjust the Doppler shift on  both transmit and receive as well as pointing your antennas with predictive dead spot  crossing so that a pass is never interrupted.
 


Re: AMSAT-NA - Website and Journal - New Look!

Clint Bradford
 

You can save almost $20 on MacDoppler if you are a member of AMSAT-NA.

Order it through the AMSAT-NA online store!

Clint


Re: AMSAT-NA - Website and Journal - New Look!

Jer W
 

Thank you so kindly Clint. I will read all that info later tonight.
Thanks again.

Jerry...W8RQM



On Friday, May 1, 2020, 9:22:08 PM EDT, Clint Bradford via groups.io <clintbradford@...> wrote:


>> ... is anyone on Work-Sat groups using MacDoppler ... 

Yes - for MANY years ... since 2006 ...

>> ... doppler shift ... ICOM IC-9700 ...

MacDoppler certainly support the '9700 ... See their Web site and documentation at ...

https://www.dogparksoftware.com/MacDoppler.html


 
MacDoppler: will calculate the position and relative  velocity of the satellites you are tracking and automatically adjust the Doppler shift on  both transmit and receive as well as pointing your antennas with predictive dead spot  crossing so that a pass is never interrupted.
 


Re: AMSAT-NA - Website and Journal - New Look!

Clint Bradford
 

>> ... is anyone on Work-Sat groups using MacDoppler ... 

Yes - for MANY years ... since 2006 ...

>> ... doppler shift ... ICOM IC-9700 ...

MacDoppler certainly support the '9700 ... See their Web site and documentation at ...

https://www.dogparksoftware.com/MacDoppler.html


 
MacDoppler: will calculate the position and relative  velocity of the satellites you are tracking and automatically adjust the Doppler shift on  both transmit and receive as well as pointing your antennas with predictive dead spot  crossing so that a pass is never interrupted.
 


Re: AMSAT-NA - Website and Journal - New Look!

Jer W
 

Just an inquiry, is anyone on Work-Sat groups using MacDoppler
and how is working with doppler shift? I am contemplating a purchase of
an ICON IC-9700, but not at this time.

MacDoppler: will calculate the position and relative velocity of the satellites you are tracking and automatically adjust the Doppler shift on both transmit and receive as well as pointing your antennas with predictive dead spot crossing so that a pass is never interrupted.

Jerry...W8RQM



On Friday, May 1, 2020, 5:42:19 PM EDT, Clint Bradford via groups.io <clintbradford@...> wrote:


The March-April AMSAT (NA) Journal was just released - in color and as 
a .pdf on their NEW LOOK Website! 

It takes a lot of work to make a good, readable-on-many-systems .pdf 
magazine. This one reads very nicely!

https://tinyurl.com/AMSAT-JOURNAL



AMSAT-NA - Website and Journal - New Look!

Clint Bradford
 

The March-April AMSAT (NA) Journal was just released - in color and as 
a .pdf on their NEW LOOK Website! 

It takes a lot of work to make a good, readable-on-many-systems .pdf 
magazine. This one reads very nicely!

https://tinyurl.com/AMSAT-JOURNAL



Re: Wouxun KG-UV9d PLUS - HRO Open Box

Randy Davenport
 

THIS model - the Powerwerx-distributed KG-UV9D PLUS from them or HRO - is, indeed, 
true full-duplex for AO-91/91 ... but NOT for SO-50: It will not work full-duplex on
440 Downlink / 2M Uplink satellites.

SO-50 can certainly be worked with it - just not full-duplex.

Clint


>> Is the Wouxon full duplex?
>> Randy ka4nma

 


Wouxun KG-UV9d PLUS - HRO Open Box

Clint Bradford
 

Just noticed that HRO has an "open box" KG-UV9D PLUS ... 

https://www.hamradio.com/detail.cfm?pid=H0-015307&oi=1



KG-UV9D Plus 999 Channel Dual-Band Handheld - 7-Band Receive

OPEN ITEM

Regular Price: $189.95

HRO Discount Price: $170.96*


Re: AO-92 to Camera Mode

 

I have been using the RTL-SDR Blog variant with good success. There seem to be some other interesting options now including some that claim to be modified for HF usage or have BiasT. I think I've even found some cheap, clones of the RTL-SDR Blog variant now on Ebay where the fonts look a little off. I might have to review the market options, though, I think the next SDR I buy will probably be focus on 1.7 GHz for use with collecting NOAA high-resolution satellite imagery. I'm not sure if my HackRF is up to the task.

- Loren
K7IW