UHF Satcom 🇬🇧 📡 📻 @uhf_satcom Twitter profile

Last Seen Profiles

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

1 year

Artemis downlink on 2216.5MHz - nice signal.

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

3 years

10GHz front end for EME!

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

2 years

Dummy load! 10kw

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

2 years

990MHz helix feed and LNA ready for some Meridian action. Antenna is an excellent match from 860MHz to 1GHz !

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

2 years

122GHz testing in progress at the RAL microwave meeting!

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

6 months

At the Cambridge computer history museum this weekend showing my 90s ham radio station :-) @computermuseum an excellent event!

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

4 years

Dragon manned flight telemetry received on 2272.5MHz - very fluttery signal but hopefully strong enough to do the needful ;-)

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

3 years

10GHz and 5.7GHz activity today from the Purbecks in Dorset, really nice weather too!

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156

UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

1 year

Got the VT320 hooked up to an old ICS AMT-1 rtty modem, decoding the German weather service on 10.1MHz

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

3 years

PELCO elevation axis DC motor added! Loads of torque!

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155

UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

3 years

Falcon 9 telemetry on 2232.500MHz - huge signal but now encrapted.

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150

UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

3 years

Azimuth motor adapter plate CNC'd and fitted, seems to be usable, nice fast rotation rate to!

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150

UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

4 years

Second Rev of Dragon - really nice signal on 2216MHz!

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

4 years

A quick video of the 39.4GHz beacon from Alphasat.

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

3 years

10GHz portable today down in Dorset.

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

1 year

QRV on 10 & 5.7 GHz today, great weather !

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134

UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

2 years

My Sinclair home computer collection is complete ;-) Very happy indeed, I've waited 42 years and one day for this!

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134

UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

1 year

A decant antenna! low sidelobe performance. Generally known as the Bat Wing antenna ;-)

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132

UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

3 years

My new dish tracking STEREO-A today, its doing a good job!

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

3 years

A before picture of the antenna, its now re homed and much cleaner! Wife still not impressed :-(

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

1 year

This is a nice thing!

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

2 years

Out with my 10/5.7GHz portable system in sunny Dorset 🌞

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

1 year

Wow!! You don't see these very often these days!!!!

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

4 years

QO100 portable system under test.

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

5 years

Not 20 or 40 meters shortwave but 10489MHz from the amateur transponder Eshail-2 - very busy, lots of SSB chat, all 599! Coverage from Brazil to Asia, amazing. @amsatdl and Qatar ARS have done an amazing job - congratulations too all involved.

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

3 years

Me spannering on my new dish working to remove it from site! As can be seen it looks large because we are close to it. Thanks to Badgers for the foto.

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

3 years

Reflector mounted! just waiting for feed back from family members :-) Temporary 45KG counter weight added, balances really nicely!

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

7 years

The dish is online!

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

1 year

Thinking about getting my packet node on air again!

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

5 years

If you have a QO100 receive system and have rain nearby try listening around 10368.100 MHz for stations in today's microwave contest!

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

3 years

I've managed to kill amateur radio! My PC has successfully worked someone else's PC on 7MHz!

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

3 years

A pretty good weekend's work. Next step is to make a proper feed holder, and sort out some permanent counter weights.

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

3 years

RIP Clive Sinclair. Picture is of course the legendary ZX81 board.

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

3 years

1GHz helical antenna designed for the Meridian HEO downlinks - excellent 50R match and reasonably good bandwidth.

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

3 years

Sun tracking test today seemed reasonably good, started at about 0630 and finished at 1600, the dot was always in the centre drain hole!

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

3 years

Soldering up ve4ma feeds, wife has banned me from using the kitchen workshop facilities :-(

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

2 years

New Icom microwave radio, 2.4, 5.6 and 10GHz with the optional transfer module. GPS antenna input too. Apparently the 10GHz module uses the 2.4GHz connector for its IF, and will have 1/2 a watt RF output.

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

5 years

Messing around with the nanovna, for the money it's a gift, very handy for checking antennas / filters etc.

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103

UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

4 years

Pretty loud signal from Dragon on the last pass, centred on about 2203MHz, lots of phasing effects as the downlink is reflected of various lumps of the ISS!

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

8 years

Juno signal, Doppler corrected and averaged; RX'd on 1.8M dish so pretty happy with the result! 8404.133686MHz TX

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

4 years

1.5M dish moved and bolted down to the concrete base that the X-Band dome was sat on! Aligned on QO100 and as expected, massive signals! Next step, make another PoTY feed, and put DATV stuff outside on the antenna ;-)

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

5 years

Es'hail 2 X-Band CW beacon received with just the LNB pointing roughly South, certainly good enough for CW and most likely SSB. Do I win the competition for smallest antenna @G3VZV ?

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

9 months

10GHz and 5.7GHz out on the Purbecks, conditions seem rubbish though :-( can't even hear KBQ on 10GHz.

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

6 years

This is a 60GHz last mile link antenna, interesting construction, basically injection moulded profile for the dish which is about 1mm mesh. Feed is beam forming array which fine tunes pointing for best signal, very clever!

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

6 years

Actually proper radio is happening at the Amsat village in emfcamp. Here is my 39.4GHz receiver in action.

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

3 years

I made a tool to cut 28mm WG shaped poly-foam plugs to prevent spiders getting into waveguides - foam seems transparent to RF and didnt get at all warm when blasted with 900W of 2.45GHz for 2 minutes.

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

3 years

A quick lash up to test the steel counter weights, seems to work as expected. I must get round to making the feed box!

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

3 years

Ready to log in for work! remote working is where its at, even at 1200/75 baud. #ZXSpectrum

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100

UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

6 years

This is a photo of my old, long gone, Inmarsat system built back in 1991 just before Desert Storm #1 - antenna was pointing at 64E Inmarsat IOR used by the CNN crew for live reporting from Baghdad. Tin can feed and FET LNA with 2 MMIC's after for line driver, AOR3000 RX.

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

4 years

I got a proper telling off from the wife today about using the kitchen like an extension to my workshop.

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

3 years

Space-X Starlink launch telemetry from this morning, on 2272.5MHz.

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

4 years

This is great - Amateur DSN gets a mention on JPL Horizons tool or Tianwen-1 ephemeris !! Awesome job.

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

3 years

Amazing!!! Good view of the X-Band patch antenna too, well done NASA/JPL.

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

4 years

Dragon 1/2 S-Band comm diagram.

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

1 year

RAM card! Lots of storage...

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

5 years

10GHz system for EME. 26 Watts at the feed, all yet to be optimised, it was a quick test to make sure the water-cooling would pump round correctly, all seemed to work as expected. RX LNA made from an old Ku LNB, seemed to work well.

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

3 years

C-Band feed holder completed!

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

4 years

Searching for a low power detector, came across this fine example on eBay!

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

5 years

I do like this Es'hail 2 transponder, very very sensitive! few mW into 1.2m offset and I can get FFT written messages through.

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

9 months

Bell Hill beacon complex servicing day. Head units cleaned, mast cleaned, 70MHz telemetry antenna replaced, telecommand antenna replaced. 24GHz removed for fault finding. Base plate measured for refabrication. A good day out so far ;-)

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

4 years

This is something you will probably never see again ever. Its a waterfall of SSB/FDM telephony trunk circuits that used to be carried on Arabsat 26E C-Band, now beautifully rendered in Spectravue! Recovered off VHS tape ;-)

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

3 years

1GHz helical feed completed - match looks reasonably good too, next step is to shove it on the 2.4M and point at Meridian HEO satellites @coastal8049

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

4 months

Cool satellite antennas!

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

1 year

JUICE Spacecraft X-Band downlink, massive signal as expected !

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

4 years

Another #hearsat success! Detection and acquisition of Tianwen-1 Chinese Mars mission! 8430.879MHz RX freq. Approximate RA/DEC RA = 23.02 h, Dec = -3.193° - that'll teach them not to give us tracking data or frequency info ;-) How do you like them eggs !!

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

3 years

Oops! drain failure resulted in about a 1.5M wide pool of water in my dish! That must have been quiet heavy...

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

3 years

A quick setup of xband to check performance, seems excellent. I've also finished the waterproofing solution, looks great too!

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

6 years

Initial try at a es'hailsat dual band dish feed. 22dB RL at 2401MHz which will probably do the job. easy to waterproof the N type too.

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

4 years

This lot of feeds will be of to their new homes, another handful of amateur DSN folks will be on the air!! (And x-band wxsats etc). Now time for beer!

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

5 years

Es'hailsat 2 Ku beacon 10706MHz, currently the sat is at 25E +- 0.2 deg.

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

5 years

My first ever 10GHz EME QSO completed today with OK1KIR first in QRA64D then in CW, my tx in yellow, his in red, very pleased indeed!

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

1 year

I treated myself to one of the NXP TEF6686 based receivers for OTG monitoring, impressive sensitivity, OIRT coverage and a fast locking RDS decoder. Shortwave performance is amazing too!! More tests to follow ;-)

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87

UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

1 year

I found this photo of my antenna when it was at its original home - as you can see very tatty and unloved ;-( The feed assembly weighed about 20Kgs! Motorised skew stuff.

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

1 month

Tried some teletext recovery from VHS today, really impressive results!!

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

4 years

Hahh someone is writing on the FFT when piss-poor signals appear - great that others are concerned too. #QO100

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

2 months

X-Band downlink from Juno spacecraft at just over 850,000,000Km distance! Dig it!

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

5 years

Es'hailsat-2 dual band feed finished - LNB has external reference and is rotatable independently of the patch feed, next step, get it on the dish and measure Rl again. I knew keeping the bag of brass plumbing fittings was wise ;-)

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

5 years

Wow that was fun! Added the new TCXO to the PLUTO sdr!

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

9 years

Great to hear Philae is chatting again! Here is an FFT of the signal from Rosetta on 8.4GHz, only 304560495Km away http://t.co/FcHPMHkjyh

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

4 years

Happy New Year to all my followers, have a great and productive 2020! Lets make satellite monitoring great again ;-)

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

3 years

Merry Christmas everyone!

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

1 year

Revived PK232! These were epic back in the day.

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

4 years

Something for the weekend! Operating report to follow.

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

3 years

I can't find my eprom eraser so made one from a UV LED I had in stock, overnight it seems to have blanked the device!

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

2 years

I'm up on the purbecks IO80WP with my portable 10GHz + 5.7GHz Station for the @UKGHZ cumulative contest, weather is OK but a bit blowey. KST plus Zello for talkback.

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

5 years

PLUTO with opto-coupler board, these cheap eBay boards can be driven perfectly by the PLUTO GPIO ports and provide a robust 5V out for driving your PTT / stuff. Added external 5V input, awaiting cheap (2£) microUSB to Ethernet adapter too.

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

3 years

First wash and wax finished, there was years of moss type stuff growing everywhere!

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

6 years

A few people have asked what is on the back end of the @airspy_com Inmarsat spyserver, here is the antenna + LNA setup.

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

1 year

Some evidence that the Hakuto-R lander did. X-Band seems to show descent followed by Lunar Doppler before things went a bit pear shaped. Shortly after, X-Band uplink sweeps were noted. See tweets by @eb3frn for a longer time span FFT.

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

3 years

A nice way to spend valentines day! An entire uninterrupted day tweaking and fiddling in the workshop.

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

3 years

Very interesting QSO via QO100 with PY5ZUE who said the satellite was at -1.1deg elevation, deep + slow QSB on his signal - amazing!!! from below noise floor to 59!

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

6 years

X-BAND antenna tracking the super moon, looking for signs of life from the Yutu rover or Chang'e'3 Lander.

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

1 year

To open or not...

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

5 years

Driver amp water cooling test setup, this is the 10w 10GHz pre-driver.

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

7 years

Automated X-Band antenna tracking of STEREO-A, Mars spacecraft, Sun, Moon, Dawn and Spitzer today. (trial IP cam timelapse software)

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

4 years

One last cuddle and its gone ;-(

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UHF Satcom 🇬🇧 📡 📻

@uhf_satcom

6 years

Es'hailSat S-Band transmit up-converter finished last night. SG-Labs transverter and @pe1rki PA gives about 50-55W out on 2401MHz which should do the job. Internal PSU is 27V @ 20A so bit OTT but should have a comfortable life. Next step is antenna + feed.