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23cm ATV Activity ?
https://www.hamradiodeals.co.uk/forums/viewtopic.php?f=48&t=12933
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Author:  M0ATV [ Fri Aug 27, 2010 10:28 am ]
Post subject:  23cm ATV Activity ?

Just curious if any of our users on HRD are active on 23/24cm FSATV, I've recently got back into it after a long absence, find that from my location here in Stockport IO83WJ its quite good, the guys over in Merseyside are VERY active particular the Wirral stations with daily transmissions from up to 4 or 5 stations on 1250 Mhz, Liverpool also has a number of stations active & there is ALWAYS Brian G3SMU from his superb vantage point near Bolton.
I'd love to see some more local activity from around Manchester though as I'm sure there are quite a few people with the gear but just not using it these days, as a last resort there is good old GB3UD ( 1316.500 ) in Stoke which puts a good siganl up here, so let me know what your part of the country is like, are you experimenting with digital ATV yet, a couple up here are but prices are very prohibitive at the moment, Tony M0ATV

Author:  gw8asd [ Fri Aug 27, 2010 10:52 am ]
Post subject:  Re: 23cm ATV Activity ?

I've an Echostar SR50 here which, I'm told, is suitable.
Any comments would be appreciated so, perhaps, I can get going in RX mode at least. :)

I gather all ATV, on 23cm, is now horizontally polarised?

Cheers

Tony

Author:  M0ATV [ Fri Aug 27, 2010 8:48 pm ]
Post subject:  Re: 23cm ATV Activity ?

That echostar would perform very well indeed on 23cm ATV Tony, all you have to do is disable the output voltage from the F socket ( to LNB ) to prevent any damage to pre amps etc, all ATV activity is in horizontal mode, we tend to monitor 144.750 FM for talkback or skeds etc, you would see plenty off video feeds from all around the NW Tony, try connecting it up to your beam, point it at Mow Cop & tune either end until you see GB3UD on 1316.500 horizontal via its Alford Slot omni, its a cracker signal here & in permanent TX mode for antenna tests etc, you should be able to RX me direct from here, who knows, it might even make you think about having a try at TX as well..................Tony




see this thread for info on old Sat RX

http://www.avforums.com/forums/satellite-tv/1078330-analogue-satellite-receiver-throwing-yours-out-dont-send-landfill.html

Author:  gw8asd [ Sun Aug 29, 2010 6:21 pm ]
Post subject:  Re: 23cm ATV Activity ?

The SR50 has a fuse in the LNB power line.
It had already been removed as I used to use this RX on a split off a motorised system.

The big problem is that I have fitted a 10 turn pot to the tuning so there is no calibration to set up frequencies.
I'll either have to fit a 10 turn dial or feed the local oscillator out to a counter.
That's the preferred method.
The tuner in the SR50 has two phono sockets on it.
One is the 70MHz IF output, I wonder what the other is?
Not an oscillator feed I don't suppose. :)
Do you know of anyone who might know?
I'll have to have a hunt around.
Anyway I looked at the repeater website and it would appear I am well out of the coverage area.
Nothing ventured etc so I connected up, via my masthead preamp sequencer and:-
Attachment:
gb3udfirst.jpg
gb3udfirst.jpg [ 80.89 KiB | Viewed 1387 times ]

:D

A couple of other carriers I can't lock but it's a start.

Cheers

Tony

Author:  M0ATV [ Sun Aug 29, 2010 8:20 pm ]
Post subject:  Re: 23cm ATV Activity ?

Well done on having a go Tony, what is the path between our two ( IO83 WJ ) locations like, I have no plotting software installed on this PC, I reckon with your antenna setup it would probably work, just call on 144.750 FM & point North & call Brian G3SMU who lives in a super location half way up Winter Hill, his 23cm ATV signals have been seen down in Devon under slight lift condx, he's ALWAYS monitoring that freq & will gladly fire 90w of 1250 Mhz ATV down your way, I guarantee you will see him, as for the other bits on the Echostar, Brian will know all about that RX, he probably has a few of them at his shack, I'll be in 23cm ATV TX mode for an hour or so from 21.30 tonight, if your about give me a call on 144.750, & once again, well done on having a go..........thats what its all about.................Tony

Author:  gw8asd [ Sun Aug 29, 2010 8:39 pm ]
Post subject:  Re: 23cm ATV Activity ?

I've been listen on .750
It was very busy earlier but I didn't hear anything about TV so I wonder if it was being used as a chat channel?

I'll give you, and Brian, a call.

Cheers

Tony

Author:  gw8asd [ Sun Aug 29, 2010 9:48 pm ]
Post subject:  Re: 23cm ATV Activity ?

Thanks for the signal, and help, tonight Tony.
Also thanks to Chris, M1EEV, for calling in.

I'll get there in the end. :D
Attachment:
gb3ud2.jpg
gb3ud2.jpg [ 63.09 KiB | Viewed 1366 times ]


A bit better again.

Will it still work after I've taken it apart and tidied up. :lol:
It can't live on the test bench. :)

Something else to take up the spare time I don't have. :lol:

Cheers

Tony

Author:  M0ATV [ Mon Aug 30, 2010 11:02 am ]
Post subject:  Re: 23cm ATV Activity ?

Thats a big difference between the 1st pic of UD and the 2nd Tony, so the tweaking & fine tuning has worked, one thing to bear in mind with ATV on 23cm is every 5 seconds or so you will notice a rapid blip on the received signal due to radar interference, I especially notice it when I watch GB3UD on the top end of the band, also for anyone interested in seeing a live stream from GB3UD, G7IEI streams it 24/7 from his website at > http://www.g7iei.co.uk/

I'll be on during the day a few times & also this evening and will also be transmitting via UD as well, catch you soon Tony.

Author:  gw8asd [ Mon Aug 30, 2010 11:10 am ]
Post subject:  Re: 23cm ATV Activity ?

Thanks for that.
I had noticed the glitches and assumed they were radar as I can often hear it on SSB.
I'll try calling Brian, after I've strimmed the lawn edges :D .
I can't mow it as I've loaned the mower to a friend. :lol:

I need a way to read frequency!

I have located what looks like a security camera, beaming 120 from here,
The video level is very high, and the signal not too strong.
It looks like a drive way.
I assume it should not be there?

I suppose I'd better start looking for a TX now. :lol:

Cheers

Tony

Author:  G8VHI [ Tue Sep 07, 2010 5:09 pm ]
Post subject:  Re: 23cm ATV Activity ?

Heck Tony repeaters 144.750 thats FM you know! Do you need any help? I think you need a trip to the Docs. Before you know it you will be on top band CW!
Reg G8VHI

gw8asd wrote:
Thanks for that.
I had noticed the glitches and assumed they were radar as I can often hear it on SSB.
I'll try calling Brian, after I've strimmed the lawn edges :D .
I can't mow it as I've loaned the mower to a friend. :lol:

I need a way to read frequency!

I have located what looks like a security camera, beaming 120 from here,
The video level is very high, and the signal not too strong.
It looks like a drive way.
I assume it should not be there?

I suppose I'd better start looking for a TX now. :lol:

Cheers

Tony

Author:  M0ATV [ Tue Sep 07, 2010 6:36 pm ]
Post subject:  Re: 23cm ATV Activity ?

:lol: Hee Hee, don't panic folks Tony hasn't lost his marbles, just dipping his toe into another part/mode of operation, also if your reading this Tony, I managed to finally get hold of some LDF4-50 hardline coax, just waiting on arrival of one more N type connector & a decent day to drag the Westflex-103 down & finally do the antenna some justice at last.

Author:  gw8asd [ Tue Sep 07, 2010 10:06 pm ]
Post subject:  Re: 23cm ATV Activity ?

G8VHI wrote:
Heck Tony repeaters 144.750 thats FM you know! Do you need any help? I think you need a trip to the Docs. Before you know it you will be on top band CW!
Reg G8VHI

I know.
I used it to set the RX up , a bit like a beacon :D , and then looked for stations simplex.
Surprisingly I found two.

All put away now as I really must get 13cm, SSB, sorted or the microwave guys will stop talking to me. :lol:

Cheers

Tony

Author:  G0UEX [ Wed Sep 22, 2010 9:39 pm ]
Post subject:  Re: 23cm ATV Activity ?

G8VHI wrote:
Heck Tony repeaters 144.750 thats FM you know! Do you need any help? I think you need a trip to the Docs. Before you know it you will be on top band CW!
Reg G8VHI

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