Date   

Re: Fascinating Site

G Hopper
 

That is seriously cool.

Too many clouds overhead tonight, but this just got added to my bookmarks toolbar.

Thanks for the share Clint!

73,
Grant
KB7WSD


On Fri, May 15, 2020 at 11:16 PM Clint Bradford via groups.io <clintbradford=mac.com@groups.io> wrote:
Check out this site - not just communications satellites, but visible passes of other satellites ...

 https://james.darpinian.com/satellites/


Fascinating Site

Clint Bradford
 

Check out this site - not just communications satellites, but visible passes of other satellites ...

 https://james.darpinian.com/satellites/


Re: IC-9700 full duplex for Sats using preamps?

creasey@...
 

Perhaps this video I put together may help.

IC-9700 SSB Preamps for 2M/70cm (AI4Y)
https://youtu.be/07dxqEtj5VQ    

73 AI4Y
Richard
9700 SSB Preamps for 2M/70cm

 


Re: IC-9700 full duplex for Sats using preamps?

Stefan Wagener
 

It's very simple. The IC-9700 powers external  preamps via 12V on the respective feed line. If you TX on 2m, the internal sequencer will shut off the 2m preamp on the 2m feed line while the 70 cm preamp is still working while still powered on the 70 cm feed line and vice versa. This has been the case with IC-9100, the IC-910 and so on. The TS-2000 never had that option. One of the biggest faults in my mind. You had to buy/use an external sequencer and power inserter for each band.

73, Stefan VE4SW

On Tue, May 12, 2020 at 11:44 PM Clint Bradford via groups.io <clintbradford=mac.com@groups.io> wrote:
I am '9700-illiterate ... but found a little here for you -

https://stationproject.blog/2019/04/20/sat40-part5-new-ic-9700/


Re: IC-9700 full duplex for Sats using preamps?

Clint Bradford
 

I am '9700-illiterate ... but found a little here for you -

https://stationproject.blog/2019/04/20/sat40-part5-new-ic-9700/


IC-9700 full duplex for Sats using preamps?

mchenryproj
 

I haven't searched totally everywhere but there doesn't seem to be any real explanation of how the preamp situation works with the IC-9700.  I had a Kenwood TS-2000X that had a separate PTT closure for each band. You could wire a traditional Preamp with small relays or switching transistors to 12vdc for each band and when the PTT was closed on the TX band it would kill the preamp and/or switch to the TX port of the relay as per normal but it would leave power to the other unaffected non -TXing band.  The thing is, if one is doing satellite work using preamps on all bands on the IC-9700, with only one PTT closure it would kill the RX preamp when TX on 2m making it rather hard to hear on 432 right?

How are folks utilizing preamps on each band with the IC-9700 when doing duplex, like with satellites?

 I just ordered the book about the 9700 from Amazon tonight hoping some of this will be covered.

(I also posted this question on the IC-9700 group)

 Sean

KB8JNE


Re: Practical Wireless Magazine

Clint Bradford
 

>> ... Thanks for a great website – it helped me a lot! - Daimon.


Practical Wireless Magazine

Clint Bradford
 

The June, 2020 issue of @REnthusiasts magazine - Practical Wireless - features the article, "My First Steps with Satellites" by Daimon Tilley G4USI on pages 44-47.

Thank you, Daimon, for the citation of our Work-Sat site!




The June Practical Wireless is available now from ...

https://pocketmags.com/practical-wireless-magazine


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?




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