GB3CT on air

Ideas, technical topics, help and discussion for ATV enthusiasts
Forum rules
This forum is run by the BATC (British Amateur Television Club), it is service made freely available to all interested parties, please do not abuse this privilege.

Thank you
Post Reply
User avatar
g7kpm
Posts: 19
Joined: Sat Feb 23, 2008 9:00 pm

GB3CT on air

Post by g7kpm » Wed May 12, 2021 7:27 pm

GB3CT is now transmitting on 3404Mhz DVB-S2 1M/s from IO93UM, Caistor Top, Lincolnshire Wolds.
No receivers are currently active, beacon mode only.

Any coverage reports would be appreciated.

73s, Jason G7KPM

M0DTS
Posts: 497
Joined: Sun Feb 24, 2008 9:03 pm

Re: GB3CT on air

Post by M0DTS » Thu May 13, 2021 9:51 am

Couple of screenshots of paths i tested yesterday.

IO94JF Sutton Bank was fine with a little qsb, up to D4.
path IO94JF.JPG
path IO94JF.JPG (121.91 KiB) Viewed 625 times
gb3ct.jpg
gb3ct.jpg (205.87 KiB) Viewed 625 times

IO94LI Cockayne Ridge was about 2dB over the noise so a little weak to decode, another 2-3dB may just have done it.
Interesting that the path plot suggests it should be nearly 20dB worse there.
path IO94LI.JPG
path IO94LI.JPG (128.82 KiB) Viewed 625 times

m1cdq
Posts: 108
Joined: Thu Feb 28, 2019 4:28 pm

Re: GB3CT on air

Post by m1cdq » Thu May 13, 2021 12:09 pm

Rob out of curiosity what is your rx set up

M0DTS
Posts: 497
Joined: Sun Feb 24, 2008 9:03 pm

Re: GB3CT on air

Post by M0DTS » Thu May 13, 2021 2:09 pm

It's an 80cm Dish with a C-band LNB (C1W-PLL type) at the feed point.
Unfortunately those LNB's are not as easy to come by, the non PLL ones are easier to get and do also work for 1Ms signals but you have to be careful of any LO offset.

Rob

M0DTS
Posts: 497
Joined: Sun Feb 24, 2008 9:03 pm

Re: GB3CT on air

Post by M0DTS » Thu May 13, 2021 2:15 pm

Now i've looked at the photo i took of the dish pointing to CT i think i may have been on a vertical lobe as the dish looks to be pointing very low!!

This will explain whey there was not as much signal difference between the two sites as predicted.
I'll confirm this next time i'm at the site.

Rob
Attachments
Dish to CT.jpg
Dish to CT.jpg (211.97 KiB) Viewed 579 times

User avatar
g7kpm
Posts: 19
Joined: Sat Feb 23, 2008 9:00 pm

Re: GB3CT on air

Post by g7kpm » Fri May 14, 2021 9:59 pm

Thankyou for the report Rob, it's good to see that the repeater is getting out OK.
Much appreciated.

73s Jason G7KPM

Post Reply

Return to “General ATV Discussion”