Copies of CQ-TV more than 2 years old are free to download at https://batc.org.uk/cq-tv/cq-tv-archive/
Issue 280 Summer 2023
| Article
|
Page
|
| News from the Treasurer
|
7
|
| The future of 23cms – update
|
9
|
| ARISS International Meeting April 2023
|
10
|
| How to connect the receiver and transmitter to the feed?
|
13
|
| The Raspberry Pi disk imager
|
15
|
| Cheapskate’s “Stream Deck” alternative
|
16
|
| Amateur television comes to the farm
|
17
|
| Dish experiments for /P operation
|
19
|
| My Shack - Dave, G8GKQ
|
21
|
| Rechargeable battery for occasional use
|
23
|
| The BATC HDMI video source
|
25
|
| Signal Box
|
25
|
| Norbreck Rally 2023
|
28
|
| Turning Back the Pages
|
29
|
Issue 279 Spring 2023
| Article
|
Page
|
| Treasurers Report for 2022
|
10
|
| Rx-Tx changeover control board
|
12
|
| Receiving HAMTV
|
14
|
| GB3NQ H264/H265 encoder box
|
17
|
| IARU Region 1 ATV Contest
|
19
|
| Network remote control for the Yaesu G5500 rotator
|
20
|
| Sending High Speed Data over HF Channels
|
11
|
| BATC-branded shirts (and other items)
|
14
|
| Height and position of your antenna is important!
|
15
|
| A prototype DATV repeater
|
20
|
| Portable power for 28V and 50V
|
21
|
| Tributes paid to TV amateur- Roger G8IUC
|
23
|
| Making a front panel fascia using a vinyl label
|
24
|
| The LimeSDR Mini 2.2
|
25
|
| Wideband data tests on QO-100
|
26
|
| Band filters on epoxy board and simulation software
|
27
|
| The Portsdown Newsletter
|
30
|
| OpenTuner Windows software for MiniTiouner hardware
|
32
|
| Turning Back the Pages
|
33
|
Issue 278 Winter 2022
| Article
|
Page
|
| Hamfest report
|
7
|
| IMPORTANT - Change of BATC bank details
|
7
|
| 29MHz transatlantic DATV experiments
|
8
|
| Simple 144MHz to 29MHz transverter
|
9
|
| Beware the inverted Spectrum with SDR Angel…
|
9
|
| It’s DATV Jim, but not as we know it
|
10
|
| Sending High Speed Data over HF Channels
|
11
|
| BATC-branded shirts (and other items)
|
14
|
| Height and position of your antenna is important!
|
15
|
| A prototype DATV repeater
|
20
|
| The Portsdown Newsletter
|
24
|
| SSTV on GB3GG
|
26
|
| SM ATV exciter for 23cm, 13cm or 6cm
|
27
|
| A noise source for my Portsdown 4
|
30
|
| Noise source offer
|
30
|
| BATC at Midlands Round Table - December 22
|
31
|
| Introduction to ATV videos
|
32
|
| Taming the Pluto in a Portsdown 4/Langstone
|
32
|
| Portable operation at the Crystal Palace Radio and Electronics Club
|
33
|
| G8TA centenary DATV unit build
|
34
|
| Turning Back the Pages
|
37
|
Issue 277 Autumn 2022
| Article
|
Page
|
| Derek G. Whitehead GW3FDZ (SK)
|
6
|
| Experiments with filters
|
9
|
| Multiviewer script for the BATC streamer
|
12
|
| To what extent can contact paths be predicted?
|
13
|
| CAT 22 part II Agenda
|
18
|
| The Portsdown Newsletter
|
19
|
| The BATC General Meeting
|
21
|
| A selection of images from CAT22
|
25
|
| IARU Region 1 2022 ATV Contest Results
|
26
|
| Possible IARU Region 1 ATV contest rule changes
|
28
|
| Networked remote DATV receiver - Longmynd Client
|
30
|
| Options for a Digital ATV Repeater Transmitter
|
35
|
| Out and about at the McMichael rally…
|
36
|
| The wonderful world of surplus
|
37
|
| Turning Back the Pages
|
40
|
| Hungarian DX-TV Reception
|
43
|
Issue 276 Summer 2022
| Article
|
Page
|
| BATC Accounts 2021
|
10
|
| The “Portsdown Double”
|
11
|
| The Portsdown Newsletter
|
12
|
| Long distance DATV contacts
|
13
|
| What to go for - Yagi or dish?
|
14
|
| Microphone amplifiers and audio level setting
|
18
|
| Electromagnetic Field
|
20
|
| Filtering Is important on receive as well
|
23
|
| An alternative DATV repeater controller update
|
23
|
| Former BATC president - silent key
|
27
|
| BATC representation at HamRadio 2022
|
28
|
| Contest adventures and misadventures
|
29
|
| The future of 23cms – update June 2022
|
30
|
| Ryde Newsletter
|
31
|
| The inside scoop - ‘Mr Whippy’
|
32
|
| BATC represented at the NARSA Blackpool Rally
|
33
|
| RP2040 – a Microcontroller Chip from the Raspberry Pi Foundation
|
34
|
| IARU 2021 Contest Awards
|
37
|
| Internet repeater in north Cumbria
|
38
|
| The Tilt-O-Matic
|
39
|
| Turning Back the Pages
|
41
|
Issue 275 Spring 2022
| Article
|
Page
|
| Activity Ladder updates & KITTENS 22
|
10
|
| BATC ATV repeater controller
|
11
|
| Eight channel I2C controlled audio switch
|
14
|
| GB3NQ Digital ATV Repeater Goes Fully Digital
|
15
|
| How to evaluate your signal…
|
17
|
| An alternative DATV repeater controller
|
19
|
| BATC attending HAMRADIO 2022
|
26
|
| G1MFG silent key
|
26
|
| Composite Video to HDMI Converter
|
27
|
| Portsdown Exhibited at The National Museum of Computing
|
28
|
| The Portsdown Newsletter
|
29
|
| BBC MCR21 Outside Broadcast van update
|
31
|
| A flat-plate antenna for 24cms
|
32
|
| Another use for the BATC Noise Figure Power supply board
|
33
|
| Exploring new technologies and approaches for DATV Repeaters
|
34
|
| Modifications to Nokia single transistor pallet for 2.4GHz
|
36
|
| Turning Back the Pages
|
37
|
| In memoriam
|
39
|
Issue 274 Winter 2021
| Article
|
Page
|
| BATC report to the RSGB spectrum Forum
|
10
|
| Duplex filter for 13 and 23/24 cm
|
12
|
| The Portsdown noise figure meter
|
14
|
| Ryde Update
|
18
|
| EMF compliance for ATV Operation
|
19
|
| A nice little ‘Ryde’ in the country
|
20
|
| ISS SSTV in late December
|
21
|
| Noise sources for NF measurement
|
22
|
| QO-100 Accessory Unit
|
24
|
| SatController & SatServer
|
25
|
| Noise Source Power Supply
|
27
|
| The Portsdown Newsletter
|
29
|
| Out and about – David Holman M0YDH
|
30
|
| GB3NQ Transmitter Upgrade
|
31
|
| Turning Back the Pages
|
33
|
Issue 273 Autumn 2021
| Article
|
Page
|
| The Portsdown Newsletter
|
7
|
| Reliability improvement for the Portsdown eight-way RF switch
|
9
|
| CAT 21 part one – a report
|
11
|
| My Station - G8HKN
|
13
|
| Dishes and their feeds
|
14
|
| Setting up OBS for DATV
|
20
|
| IARU Region 1 ATV contest 2021 results
|
22
|
| Portsdown 4 peripheral interface
|
24
|
| It’s that time of year to check your Oscar 100 dish
|
25
|
| A Ryde receiver for GB3EN
|
26
|
| Portsdown 4 power meter
|
27
|
| A retro high-resolution dish alignment meter for the digitally-challenged
|
29
|
| Reflections from Mont Blanc
|
31
|
| It will come in useful one day…
|
32
|
| Turning Back the Pages
|
33
|
Issue 272 Summer 2021
| Article
|
Page
|
| QO-100 Transponder Availability Warning
|
7
|
| Ryde update – latest news
|
9
|
| BATC awarded the Louis Varney Cup
|
9
|
| Ryde Utilities
|
10
|
| LimeRFE Multiband PA and Preamp
|
11
|
| In search of less windage
|
12
|
| Software for BATC projects
|
13
|
| Portsdown 4
|
14
|
| Video source, video generated by an Arduino
|
21
|
| A basic logic controller for hybrid ATV repeaters
|
24
|
| BBC MCR21 progress report June 2021
|
26
|
| Arduino Stream Pad
|
27
|
| The Portsdown Newsletter
|
28
|
| A history of GB3GG
|
30
|
| Using the NWDZ amplifier as a DATV driver
|
31
|
| BATC general meeting postponement notice
|
32
|
| My QO-100 DATV station
|
33
|
| Simple single range high power meter for 23cms or 13cms
|
36
|
| The ‘Boxer’, a brick amplifier for 24cms
|
38
|
| Out and About…
|
40
|
| Turning Back the Pages
|
41
|
| Slowscan TV from the ISS
|
43
|
Issue 271 Spring 2021
| Article
|
Page
|
| Why is my repeater delayed by 15 seconds?
|
8
|
| 2020 Christmas Repeater Contest Report
|
9
|
| Portsdown 4 – Start here
|
10
|
| ATV frequencies and recommended modes
|
13
|
| Reduced bandwidth DVB-T for DATV use
|
14
|
| Reduced-Bandwidth DVB-T Receive Systems
|
16
|
| Reduced-Bandwidth DVB-T Transmit Systems
|
18
|
| WinterHill - a four-channel DATV receiver
|
20
|
| The BATC Forum
|
24
|
| How to make a horn (reference) antenna
|
25
|
| A look at the History of BBC Outside Broadcast Vans
|
29
|
| Ian Waters, G3KKD - Silent Key
|
32
|
| GB3FT Digital Repeater upgrade
|
33
|
| Alternatives to the Elgato Streamdeck
|
36
|
| Modifications to Nokia PA PCB
|
37
|
| My Portsdown4/Langstone combo
|
39
|
| Turning Back the Pages
|
41
|
Issue 270 Winter 2020
| Article
|
Page
|
| The BATC Bursary Scheme
|
6
|
| BATC report to the RSGB Spectrum Forum
|
7
|
| A quick word about “SATSAGEN”
|
11
|
| Composite Video Source
|
13
|
| CAT20 - a review
|
15
|
| BATC project status – December 2020
|
18
|
| Modifying the Nooelec Ham it up Up-converter for 71 MHz DATV
|
20
|
| How to use a Pluto for DATV
|
21
|
| Modifications to a board from Bison Electronics
|
27
|
| The Portsdown Newsletter
|
28
|
| Building the Ryde Receiver
|
29
|
| A TCXO for QO-100
|
31
|
| Television History – Live! Part 2
|
33
|
| 9 cm station from Wimax components
|
37
|
| Turning Back the Pages
|
41
|
Issue 269 Autumn 2020
| Article
|
Page
|
| IARU Region 1 ATV Contest 2020
|
10
|
| BATC Convention for Amateur Television 2020 (CAT 20)
|
11
|
| Treasurer’s Report for 2018 & 2019
|
12
|
| Report from PI9CAM during the Dutch ATV Contest on September 13
|
14
|
| The Ryde set top box receiver for DATV
|
15
|
| In search of maximum talk-back
|
17
|
| Eight Band contact with G3VKV
|
18
|
| Setting up the Jetson Nanobox Software
|
19
|
| Jetson NanoBox Part 2 - The LKV373A HDMI Interface
|
22
|
| The BMD ATEM range of video switchers
|
24
|
| Every ATEM Needs a Companion
|
26
|
| Replacing a Sharp Tuner with a Serit
|
28
|
| Power & Outside Broadcast Vans
|
30
|
| Jetson Nano PTT switching
|
31
|
| VK3RTV Melbourne Australia July 2020
|
32
|
| The Portsdown 4
|
34
|
| Reduced bandwidth analogue ATV, the easy (lazy?) way
|
38
|
| Portable stable bias voltage
|
41
|
| Turning Back the Pages
|
42
|
Issue 268 Summer 2020
| Article
|
Page
|
| Dutch analogue ATV experiments in the 6 cm band
|
10
|
| Using UDP for Sending Video over a Network
|
14
|
| Portsdown Newsletter
|
16
|
| Cost-effective multiband dish feed
|
18
|
| Our History in Eight Badges
|
20
|
| DATV Express 1.25LP14 in practice
|
21
|
| The BATC Library
|
24
|
| Skype as a repeater input
|
25
|
| An introduction to Video Editors
|
27
|
| Ex broadcast ‘LGT’ amplifiers in 436MHz DVB-S service
|
29
|
| Configuring a Router for the Jetson NanoBOX
|
30
|
| Experiments on 4 metres
|
31
|
| Converting a TV repeater to widescreen on the cheap
|
32
|
| CAT 20 Will Happen, But Online
|
33
|
| Television History – Lives
|
34
|
| A 2.4GHz Interdigital Bandpass Filter
|
38
|
| Lock Light Mod for the DVB-S2 Combo Receiver
|
40
|
| Turning Back the Pages
|
41
|
| DATV activity contest report
|
43
|
Issue 267 Spring 2020
| Article
|
Page
|
| One Year of Operation for the Goonhilly WebSDRs for QO-100
|
8
|
| Neat Housing for the Portsdown 7-Inch Screen with Pi Camera
|
9
|
| ATV repeater PI6ATS
|
10
|
| Electronic push button on-off switch for the Portsdown
|
12
|
| DATV Activity in North Northamptonshire
|
13
|
| CQ-TV, the BATC and you, our members
|
14
|
| A new controller for VK2RTS
|
15
|
| Don Saunders, G0WFT - silent key
|
18
|
| DATV repeater receiver with active video switch
|
19
|
| BBC MCR21’s Sound Mixer Desk and audio systems
|
21
|
| Remote Repeater and Station Monitoring with Modbus (Part 1)
|
23
|
| Video production with a smartphone part two
|
27
|
| Revived Terrestrial Activity
|
28
|
| Portsdown Newsletter
|
29
|
| A 10 Watt Linear Amplifier for 70cms DATV or narrowband modes
|
30
|
| A compact 12 volt Beam Antenna rotator
|
31
|
| Turning Back the Pages - CQ-TV 78
|
32
|
Issue 266 Winter 2019
| Article
|
Page
|
| A New Repeater Transmission Standard for the 2020s
|
9
|
| BATC report to the RSGB Spectrum Forum
|
12
|
| ADALM-PLUTO DATV TX – “How To”
|
14
|
| A 30 watt driver amplifier for 2.4 GHz
|
19
|
| Out portable for the BATC November Activity weekend
|
21
|
| 5.6 GHz TV Receiver
|
22
|
| Using the Jetson Nano with the LongMynd software
|
25
|
| GB3ET Repeater
|
27
|
| Video Fundamentals 20 - Outside Broadcast Vans
|
28
|
| Portsdown Newsletter
|
30
|
| 25 MHz reference, biasT and diplexer for QO-100
|
31
|
| The Secret Life of a TV Repeater
|
33
|
| Jamboree on the Air and QO-100
|
35
|
| CAT 19 South - a short report
|
36
|
| Turning Back the Pages
|
37
|
| DATV at the SDR Makerspace Conference
|
39
|
Issue 265 Autumn 2019
| Article
|
Page
|
| The BATC bursary scheme
|
7
|
| IARU Region 1 ATV Contest 2019 Results
|
8
|
| OBS and the Portsdown
|
10
|
| Using Mitsubishi MOSFET power modules with PE1RKI kits
|
13
|
| Telling the Story of MCR21
|
16
|
| Video Fundamentals 19
|
18
|
| The Jetson NanoBox
|
20
|
| LNB power supply with current limit for MiniTiouner
|
22
|
| A 250 Watt amplifier for Es’Hail-2 DATV
|
23
|
| Portsdown Newsletter
|
26
|
| The RSGB filming a new promotional video
|
27
|
| The LimeNET Micro – a Single-board DATV Transmitter
|
28
|
| Spectrum Matters
|
29
|
| The LongMynd Receiver on the Portsdown
|
30
|
| The LongMynd Receiver
|
32
|
| The G4WIM PA controller
|
34
|
| Turning Back the Pages - a 70 year special!
|
39
|
| ATV at Chalon-sur-Saone fayre
|
43
|
Issue 264 Summer 2019
| Article
|
Page
|
| BATC stand, Blackpool 2018 & 2019
|
8
|
| BATC Members’ Shop Update
|
9
|
| MCR21 Project Launch
|
12
|
| 23 cm QRM
|
13
|
| Protecting Your LimeSDR Mini
|
14
|
| Portsdown Made Simple
|
15
|
| How to use K7FRY’s 10 Character Locator Website
|
16
|
| Dual channel output for the BATC version 2 MiniTiouner PCB
|
17
|
| KITTENS 19 & KITTENS 19 Activity Day
|
19
|
| Goonhilly Spectrum Monitor and WebSDR Maintenance Visit
|
21
|
| Video Fundamentals 18
|
22
|
| BATC at the Kempton Park Rally
|
23
|
| A very cheap easy to make Sync detector for
analogue video
|
24
|
| Well, I tried… 5.8GHz ATV
|
25
|
| Video Production - with a smartphone! Part 1.
|
26
|
| Turning Back the Pages - CQ-TV 76
|
28
|
| MCR21 Recording its History
|
31
|
| BATC at the Newbury Rally 2019
|
31
|
Issue 263 Spring 2019
| Article
|
Page
|
| OSCAR- 100 has arrived!
|
9
|
| Receiving QO-100
|
10
|
| Transmitting Systems for QO-100 on Es’hail-2
|
12
|
| G8LES Spectrian Amplifier mods for 2.3-2.4GHz
|
15
|
| Portsdown Newsletter
|
17
|
| Bias and reference injection board
|
19
|
| Easy Hole Plating at Home
|
21
|
| New DATV record on 76 GHz
|
24
|
| Bristol Mini-CAT
|
24
|
| MCR21 Progress
|
25
|
| The old and new models of the Octagon Twin LNB
|
26
|
| Route du Rhum
|
26
|
| Cheap Ebay Bias Tee
|
27
|
| Experiments with baseband digital video
|
28
|
| A New Audio Mixer for GB3KM
|
32
|
| BATC Website Incident
|
33
|
| Video Fundamentals 17
|
34
|
| 3D Printed horn antennas - Part 2
|
35
|
| Simple dual band dish feed for Es’hail-2 (POTY)
|
37
|
| Turning Back the Pages - CQ-TV 75
|
41
|
Issue 262 Winter 2018
| Article
|
Page
|
| BATC report to the RSGB Spectrum Forum
|
11
|
| BATC response to WRC Agenda Item 1.1
|
12
|
| The story behind Es’hail-2
|
13
|
| Portsdown Support for the LimeSDR
|
15
|
| Sydney Amateur Television goes 5.6 GHz
|
18
|
| We were there at the launch of Es’Hail-2!
|
20
|
| A 23cm Power Amplifier For Digital ATV
|
22
|
| Portsdown Newsletter
|
25
|
| I bought a 3-D printer
|
27
|
| DVB-S DATV signal power measurement
|
29
|
| Low band DATV
|
30
|
| DATV on 24cms
|
31
|
| Measuring Power on 5.6 GHz & a New Receiver
|
33
|
| Baliu RB-TV in Catalonia
|
35
|
| DATV over optical - Part 2: interfacing the two
|
36
|
| Video Fundamentals 16 - Aspect Ratio re-visited
|
40
|
| Turning Back the Pages - CQ-TV 74
|
41
|
Issue 261 Autumn 2018
| Article
|
Page
|
| Touchscreen control of the DATV Express – part 2
|
9
|
| CAT18 award presentations and prizes
|
10
|
| BATC Test Equipment
|
11
|
| Microwave roundtable construction competition winners
|
11
|
| A Handy Signal Generator for 10GHz
|
12
|
| Es’Hail-2 launching soon!
|
14
|
| The Future of CAT
|
15
|
| ATV Workshop in Shropshire
|
16
|
| Portsdown Newsletter
|
17
|
| DATV over optical – an introduction
|
19
|
| CAT18 Report
|
21
|
| BATC at Goonhilly
|
25
|
| Video Fundamentals 15 - Wire, labelling & MCR21
|
26
|
| Es’hail-2 Wideband Transponder
|
28
|
| BATC members and DATV in Spain
|
29
|
| Getting ready to receive Es’hail-2
|
30
|
| BATC Awards Presentations at CAT18
|
33
|
| Never mind the width - look at the quality
|
34
|
| David Ellis Jones B.Sc, ALCM. GW8PBX (SK)
|
35
|
| Locking the Octagon PLL LNB to an external reference
|
36
|
| Turning Back the Pages - CQ-TV 73
|
37
|