2018 - 2023 CQ-TV 261 to CQ-TV 280

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Copies of CQ-TV more than 2 years old are free to download at https://batc.org.uk/cq-tv/cq-tv-archive/

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 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