2013 onwards CQ-TV 241 to CQ TV 260

Issue 257 Autumn 2017

Article	Page
Treasurers Report for 2016	9
DigiTwist	10
The ADALM-PLUTO low cost SDR	14
Silent Keys - G8AJN & G3KTU	16
Video Fundamentals 12	17
Using a MinimOSD board for On Screen Callsign Display	19
Antenna range tests at Finningley for the BATC	21
The Portsdown Digital ATV Transmitter A Beginner’s Guide	22
The Portsdown Transmitter – Security Aspects	26
Notes on Amplifiers & Filters	27
A Vintage Pye Camera	29
5.6 GHz progress	30
CAT17 report	31
Repeater Update - October 2017	33
The Bang-good 23cm aerial	34
The Portsdown Transmitter in pictures	35
A Coupler probe for use with the Rigol DSA 815-TG Spectrum Analyser	36
Turning Back the Pages - CQ-TV 69	37

Issue 256 Summer 2017

Article	Page
Portsdown Transmitter Construction Competition	10
Power Amplifier for DATV	11
DATV Moonbounce from Goonhilly	12
The Portsdown Transmitter Software	15
8 GHz eBay Power Meter	17
CAT 17 – September 9th and 10th 2017	18
eBay Ampliiers	19
MiniTioune Mark 2 DVB-S digital receiver	20
Video Fundamentals 11: Studio systems – the Matrix	23
My Station: Malcolm Johnson, G0UHY	25
A cheap and easy 6cm ATV transceiver	26
Ham Radio: DATV-Forum – the latest trends	28
Known Digital ATV DX Records	29
BATC website development	30
Wideband LNBs	31
Turning Back the Pages - CQ-TV 68	32

Issue 255 Spring 2017

Article	Page
AMSAT North America Phase 4 Ground Segment Project	10
Packaging Digithin	11
The Portsdown Project - Overview	12
The Portsdown so far… A users experience of the build	14
Portsdown Filter-Modulator Board - Construction and Testing	16
Portsdown Filter-Modulator Board Modifications	18
ATV on TV - The day TX Factor came to visit	20
G8LES Link Video recorder integration	22
Could you help with the Scouts’ JOTA 2017?	25
GB3ZZ Experimental Inputs	26
BATC website development	29
Relocation of the John Lawrence Valve Collection	30
Es’hail-2 Ground Segment Planning Meeting	31
Video Fundamentals 10: The Mixer	32
A high performance ATV upconverter	34
Turning Back the Pages - CQ-TV 67	37

Issue 254 Winter 2016

Article	Page
The BATC Portsdown DATV project	11
The Portsdown Raspberry Pi-based DATV Transmitter - Introduction	14
Constructing the Portsdown Raspberry Pi-based DATV Transmitter	16
Software for the Portsdown Raspberry Pi-based DATV Transmitter	18
HamTV Update	21
My Station - Tony Hornby, G1HBD	22
BATC report to the RSGB Spectrum Forum	24
Video Fundamentals 9 - Genlock and Reference Signals	26
Gilwell 24 - 2016	28
Turning Back the Pages - CQ-TV 66	29

Issue 253 Autumn 2016

Article	Page
The ADF4351 flexible signal source	9
7-band local oscillator	9
ADF4351 driven by an Arduino	13
GB3HV 70cms input update	15
A 437 MHz DVB-S Transmitter Using a Raspberry Pi	16
The Making of ‘TXFactor’	20
CAT16 - the full story	23
VMix to RpiDATV via FFmpeg	26
Noise Power meter for the Minitiouner	27
Video Fundamentals 8	28
DN1JKG calling OR4ISS	30
DATV-Express on Windows	32
Here and There...	34
New and renewing members	35
Turning Back the Pages - CQ-TV 65	36
High Tech Wearables	38

Issue 252 Summer 2016

Article	Page
Biennial General Meeting – Postal Votes	6
CAT 16 Details	11
Treasurers Report for 2015	12
Dual Filter Board for DigiLite 5.9	14
New super tuner design for dvb-s and s2	17
HAMPADS: HAM-Portable Affordable Dish for Satellites	18
Summer ATV Contest Images	23
Video Fundamentals 7 - Camera Signal Processing	24
The Matilda Story	26
My Station - Peter Yarde, G8DKC	35

Issue 251 Spring 2016

Article	Page
CAT 16 and BATC AGM	9
Peter Blakeborough, G3PYB - Silent Key	10
A BATC Wiki	12
The Principia Mission - Give us a wave Tim!	14
Social Media	18
Simple Antenna Tracker for the ISS	20
Animated Test Cards	22
My Station - G8VPG **New Feature**	24
Activity at GB3ET	25
Video Fundamentals 6	26
DATV-Express power amplifiers	28
Reduced Bandwidth TV Modulator	32
New Application for DATV-Express	34
More Modifications to the SUP-2400	35
leandvb: A lightweight software DVB-S demodulator	36
Open Broadcaster Software with DATV-Express	40
SUP-2400 DiSEqC update	45
Getting started in ATV - DATV reception	46

Issue 250 Winter 2015

Article	Page
Latest developments at GB3GV	6
BATC report to RSGB Spectrum Forum	8
Alan Daw, G1APD - sk	9
ARISS and HamTV - Supporting the Principia Mission	10
Goonhilly Earth Station	12
Variable SR filter for RB-TV	14
The HamTV antennas on the ISS	16
Using the SUP-2400 for 146.5 MHz Reception	17
An outing for the LDK5 camera	19
Amateur Television “Getting Started”	20
Getting Started with RB-TV	25
A bandpass filter for 146.5 MHz	28
DiSEqC control for the SUP2400	29
Video Fundamentals - Part5	31
Simple System to Receive ARISS HamTV	33
Using FFmpeg to generate a transport stream	34
DATV transmission in the UK – a short history	40
Using the Linx 1010b tablet for portable DATV	44
GB3HV Christmas Dinner	46

Issue 249 Autumn 2015

Article	Page
Outside Broadcast with the BATC	9
146MHz RD70HVF1 Amp	11
24GHz building blocks	12
2 watt driver amplifiers for 1296 and 2304MHz	15
HD TV news from Germany	19
Slow Scan TV with a Raspberry Pi	23
vMix using FFmpeg to create the Transport Stream	27
Michael Hastings, G8ASI sk	32
CAT 15 - A weekend of technical presentations	33
Video Fundamentals - Part4: The Camera’s Eye	35

Issue 248 Summer 2015

Article	Page
RB-TV Roundup	10
The Low SR World Conquest	11
DATV Developments in North Wales	16
Minitiouner - USB Tuner Module	20
Narrow band DATV on the BATC DTX1	25
Product Review - PE1RKI 23cm four pole filter	27
vMix using FFmpeg to create the Transport Stream	27
Video Fundamentals - Part 3: Picture Monitor	29
Video Sync generator	31
A Field Day station with PC6REC	36

Issue 247 Spring 2015

Article	Page
New 70MHz band for RB-DATV	9
A Two way on 146.5MHz RB-DATV	10
146MHz RD06+RD15 Amp	12
New Life for Old Rotators	13
A Guide to setting up the DATV Express for RB-DATV Operation on 146.5MHz	15
Portsmouth RB-TV Meeting	17
DigiThin - A Narrowband QPSK Modulator for the Raspberry Pi	19
DigiThin Beta Testing	22
Add-On Transport Stream Dock for BATC DTX1	23
RPiDATV software improvements	25
GB3KM - the first year of operating on 3.4GHz	26
ATV image generator using the Raspberry Pi	28
Local oscillators in 1.2GHz band, for Digilite DATV System	29
RB-TV receiver developments	31
Comparing DATV models	32
Video Fundamentals 2 - Colour Bars	34
Classic circuits - PicDream	36

Issue 246 December 2014

Article	Page
BATC report to the RSGB Spectrum Forum Oct 14	11
Reduced Bandwidth DATV (RB-TV)	13
RB-TV Awards Programme	17
Antennair DTX-F70 and the Antennair DTX-F23	18
Understanding DATV RF Bandwidth for DVB-S	20
IARU Region 1 General Conference Report	23
Video Fundamentals 1 – The Line Sync Pulse	25
BATC Streaming Service	26
RPiDATV RB-TV transmit system	28
BATC New subscription rates	33
MAX On-Screen-Display Generator	34
Classic circuits – General Purpose Amplifier	36
Digital-ATV - Using ODROID with the DATV-Express board	37
GoPro Hero 4	42

Issue 245 September 2014

Article	Page
CAT14 - in words and pictures	8
DVB-S on the Solent - Part 1	10
The Marconi at CAT14	11
Effect of Phase Noise on a DVB-S Signal	14
DVB-S on the Solent - Part 2	15
Weak Signal Performance of DVB-S Receivers	17
Geostationary ATV could be on its way!	19
Museo de la Imagen - Santiago de Cuba, Cuba	20
Annual Worldwide ATV QSO Party	23
DVB-T with a Hides HV110	30
IARU Region 1 Conference	31
A Filter for 437MHz	32
Classic Circuits - a Look Through Filter for 23cms	34
ATV streaming using a Mac	35

Issue 244 June 2014

Article	Page
The Constitution of the BATC	9
Video Processing Circuit	12
There’s something different on Fast Scan TV	16
Using a small ARM based mini TV box for digital TV	20
Online ATV streams and HAMNET	22
Streaming Student Robotics 2014	23
Treasurer’s Report for 2013	24
VK DATV QSO Party	26
New Rigol Spectrum Analyser discoveries	28
DVB-T-Receiver HV-110	34
4K – what is it?	35
Classic Circuits - A Tuneable 70cm Narrowband Filter	39

Issue 243 March 2014

Article	Page
ISS HamTV Received	9
BATC CAT14 and the General Meeting	10
New Repeaters on the Air	12
BATC and you, the Member	14
DATV-Express Project	15
HamTV from the ISS	16
VK6MJ - ISS Tracker	18
Using the Raspberry Pi to Control an Ultram VCO	19
The BATC Forum	20
70cm Yagi	22
Versatile Audio AGC Circuit	23
Digital ATV – Using a Spectrum Analyzer	29
Early Colour Cameras and their problems- Part 2	34
Classic Circuits - Remote control using DTMF	35
Turning Back the Pages - CQ-TV 56	37
Late news - New Geostationary satellite; More frequency at VHF; the latest ISS news	39

Issue 242 December 2013

Article	Page
DX Records	8
Repeater News - GB3GV	9
CAT13 - the Finningley report	11
A 2.5 Watt LDMOS Driver for the 1.3GHz band	15
A Beginner’s Guide to Field Programmable Gate Arrays (FPGAs) Part 2	18
10 GHz Synthesised ATV FM TX	21
Early Colour Cameras and their problems- Part 1	21
Stand Alone DigiLite with an MK808	24
Classic Circuits - Black Level Clamps	27
A Tutorial on Displays	29
HamTV Bulletin 3	34
Digital Integrated Receiver Decoder (IRD) for use on repeaters	37
Low Cost DVB-S Receivers Suitable For HAMTV Reception	40

Issue 241 September 2013

Article	Page
BBC BH and Paul Marshall	6
Don Reid	7
An Introduction to the DTX1 Transmitter	10
DTX1 1st User Review	11
PGA103+ Broad Band Amplifier	12
CAT13 – the BATC 2013 Convention details	15
BATC Presentation for DXSpot.TV	16
DXSpot.TV details and information	17
BATC Treasurers Report for 2012	18
50 years of home video recording	20
BATC Training – the Digital Studio part 2	24
Setting up a Virtual Studio	30
History of Television – Monoscope Cameras	36
GB3IV Repeater	38
A new approach to Digital ATV repeaters in New Zealand	40
DATV from the International Space Station – full specification	44