Date   
AO-27 ... It's Baaaaack!

Clint Bradford
 

The satellite that refuses to stay inoperative ... (grin)



Try it! Cannot thoroughly explain WHY - but try it! And please report your findings (telemetry only heard, 
up/downlinks working ok, or nothing heard) to the Live OSCAR Status Page at ...

https://www.amsat.org/status/

TLE from AMSAT-NA

Clint Bradford
 

Just booted up a copy of SatPC32 on an older Windows notebook. 

Uodated Keps, and started choosing satellites. But some aren't there ...

I noticed the program "defaulted" with another AMSAT-NA source. And that 
datafile isn't as current as this one ...

https://www.amsat.org/tle/current/nasabare.txt

SO ... if you are not finding QUETZAL-1 or CubeBel1 after updating, check 
the preferences and add/edit this one!

Clint



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

Jer W
 

Great HT for duplex, but still trying to learn all the 505 menus. I definitely need
an Elmer for those. I know some of them, but not all.

Jerry...W8RQM

On Tuesday, May 5, 2020, 11:45:27 AM EDT, Clint Bradford via groups.io <clintbradford@...> wrote:


For both U/v and V/u FM voice satellites, only the Kenwood TH-D72a does it well.

But they are $380 ... and won't be available for a few more days at HRO.

For the U/v AO-91/92 true full-duplex, the Powerwerx/HRO WOuxun KG-UV9D PLUS 
works well. Just not for SO-50 ... $189.95 at HRO - https://www.hamradio.com/detail.cfm?pid=H0-015307

There are some long-discontinued full-duplex HTs that many are using for the sats, like (not an all-inclusive list) the Icom IC-W2a and IC-W32a, Kenwood TH-D7 and TH-D79, and Yaesu’s FT-470/FT-51/FT-530 models. There may be others ... but I’d hate to see you spend a bunch of money on really old units with no warranties and fewer repair options and decreasing availability of battery packs!

SO ... Many use two HTs! Use your "best" one for receiving, and another for transmitting. Some radios will "get along" and not exhibit defense when close together ... some may require a few feet of separation. Experiment!

Clint

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

bobsayers2000
 

Thanks, Clint! I've just been reading through the User Manual, and still couldn't decide! 
 
Best regards, 
 
 
Bob

 

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

bobsayers2000
 

Just finished two conversations with two Wouxun dealers. One said he was not sure if this rig was true, full duplex. The other said it was not.

SO ... Still need to research. There are a couple YouTube videos ... eHam reviews didn’t cite duplex ...

Clint




>> ... Can the Wouxun KG-UV950P mobile be used in this way? 

 
 
 

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

Clint Bradford
 

For both U/v and V/u FM voice satellites, only the Kenwood TH-D72a does it well.

But they are $380 ... and won't be available for a few more days at HRO.

For the U/v AO-91/92 true full-duplex, the Powerwerx/HRO WOuxun KG-UV9D PLUS 
works well. Just not for SO-50 ... $189.95 at HRO - https://www.hamradio.com/detail.cfm?pid=H0-015307

There are some long-discontinued full-duplex HTs that many are using for the sats, like (not an all-inclusive list) the Icom IC-W2a and IC-W32a, Kenwood TH-D7 and TH-D79, and Yaesu’s FT-470/FT-51/FT-530 models. There may be others ... but I’d hate to see you spend a bunch of money on really old units with no warranties and fewer repair options and decreasing availability of battery packs!

SO ... Many use two HTs! Use your "best" one for receiving, and another for transmitting. Some radios will "get along" and not exhibit defense when close together ... some may require a few feet of separation. Experiment!

Clint

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

Ken Campbell
 

Clint,

I’m thinking about getting into working the sats. Is there a list of full duplex HT’s suitable for the job?
--
All the best,
Ken Campbell
N6PCD

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

Clint Bradford
 

The US version is NOT discontinued ... HRO will be receiving some soon.

Clint Bradford
951-533-4984

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

Max White
 

Here in the UK, the D-72 is now discontinued by the major suppliers and you are lucky to find the odd outlet still selling them in mint condition, or just as rare, the odd one coming up on the SH market.

de es 73 Max/M0VNG






From: Work-Sat@groups.io <Work-Sat@groups.io> on behalf of Clint Bradford via groups.io <clintbradford@...>
Sent: 04 May 2020 19:56
To: Work-Sat@groups.io <Work-Sat@groups.io>
Subject: Re: [Work-Sat] How important is it to have a full duplex ht
 
>> ... looking for a TH-D72. Looks like they're not available right now ...

They are coming. Watch HRO's site.

A LOT of products - not just Kenwood - are manufactured where plants are closed or otherwise negatively affected by this pandemic ...

Clint

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

Clint Bradford
 

>> ... looking for a TH-D72. Looks like they're not available right now ...

They are coming. Watch HRO's site.

A LOT of products - not just Kenwood - are manufactured where plants are closed or otherwise negatively affected by this pandemic ...

Clint

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

Hank Tyler
 

Thanks for all the comments. Full-duplex it is and I am looking for a TH-D72. Looks like they're not available right now due to COVID-19.

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

Fred Hillhouse
 

I have a full-duplex HT (actually two; FT-51r and D72). It is convenient for all the reasons people will list. I do like hearing the downlink when I am transmitting.

But if you only had an HT that didn’t support full-duplex, for real short money you can get another HT to use as your uplink or downlink.

 

Good luck making your decision!

 

Fred N7FMH

 

 

From: Work-Sat@groups.io [mailto:Work-Sat@groups.io] On Behalf Of Hank Tyler
Sent: Saturday, May 02, 2020 7:40 PM
To: Work-Sat@groups.io
Subject: [Work-Sat] How important is it to have a full duplex ht

 

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




Avast logo

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


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
 

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?