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- 18:05, 1 February 2021 diff hist +380 BATC Video Source Assembly link and 2 photos
- 17:47, 1 February 2021 diff hist +74 N File:Video source m0ydh2.jpeg Tripod mounted video source with output displayed on monitor current
- 17:44, 1 February 2021 diff hist +56 N File:Video source m0ydh1.jpeg Die cast box assembly of BATC video source current
- 16:29, 19 December 2020 diff hist +127 Portsdown 4 →Portsdown 4 GPIO connections: attenuator LE
- 18:59, 28 March 2020 diff hist +131 m Jetson Nano →Preparing the LKV373A HDMI Device: OpenTechLabs video
- 18:27, 15 January 2020 diff hist +377 m 70MHz filters BPF
- 18:11, 15 January 2020 diff hist +125 m 71 MHz →Equipment for 71MHz DATV: filters link to page
- 18:43, 13 January 2020 diff hist +187 70MHz filters LPF filter pics
- 18:39, 13 January 2020 diff hist +218 N File:4m LPF trace.jpg Today I made a low pass filter for 71 MHz per @G4GUO design in CQ-TV 260. It measured well. Ref level was -14 dBm with a 10dB PAD. So -2dBm loss. I haven't mastered normalizing the tracking generator yet current
- 18:37, 13 January 2020 diff hist +66 N File:4m LPF.jpg G4GUO 4m low pass filter design built by David M0YDH current
- 18:36, 13 January 2020 diff hist +2 70MHz filters
- 18:17, 13 January 2020 diff hist +831 71 MHz →Equipment for 71MHz DATV
- 18:03, 9 January 2020 diff hist +132 m RPi Test Card link to article current
- 18:53, 31 December 2019 diff hist +368 Jetson Nano →Preparing the LKV373A HDMI Device: putty settings for factory reset / webpage of IPTV server at completion.
- 18:47, 31 December 2019 diff hist +104 N File:IPTV server web page at completion.PNG The web page of the HDMI sender firmware after modification with the IPTV server firmware. current
- 18:42, 31 December 2019 diff hist 0 N File:PuTTy for HDMI sender reset.PNG current
- 13:27, 22 November 2019 diff hist +92 71 MHz →Receiver: video of upconverter in action
- 20:03, 16 November 2019 diff hist -1 437 MHz current
- 20:01, 16 November 2019 diff hist +4 437 MHz
- 20:01, 16 November 2019 diff hist +6 437 MHz
- 20:00, 16 November 2019 diff hist +67 437 MHz
- 19:58, 16 November 2019 diff hist +242 N File:Mini-kits amp pcb on Pentium P4 style heatsink and fan.jpg 437 MHz amplifier is shown nearing end of construction at M0YDH. Mini-kits UHF amp kit is mounted on the ex-computer heat sink. Their low-pass filter is inside the PCB box with the detector for the BATC bar graph display on top. current
- 19:24, 16 November 2019 diff hist +1,296 N 437 MHz 70CM AMPLIFIERS OPENING TEXT
- 18:32, 16 November 2019 diff hist +95 m 70MHz filters
- 18:29, 16 November 2019 diff hist +524 70MHz filters Further 4m filters
- 18:15, 16 November 2019 diff hist +273 Filters →Interdigital filters: VK3UM software new location current
- 20:29, 29 October 2019 diff hist +94 m The Portsdown Receiver
- 20:04, 29 October 2019 diff hist +79 m Portsdown 2019 →Advanced features: receiver
- 19:59, 29 October 2019 diff hist -6 m The Portsdown Receiver
- 19:56, 29 October 2019 diff hist +1 The Portsdown Receiver
- 19:56, 29 October 2019 diff hist +141 m The Portsdown Receiver
- 19:48, 29 October 2019 diff hist +181 The Portsdown Receiver Add photo of first received TV
- 19:42, 29 October 2019 diff hist +93 N File:LongMynd 1st pictures.jpg First Pi Cam TV received across the shack using the Long Mynd receiver software current
- 18:02, 28 October 2019 diff hist +307 Portsdown Displays →Recommended Display 2 - Waveshare 3.5 inch Type A: bloody things fail so you have to buy two of them
- 17:52, 6 October 2019 diff hist +75 ADF435x PIC →Using a Chinese Pickit 3 current
- 17:50, 6 October 2019 diff hist -1 ADF435x PIC →Using a Chinese Pickit 3
- 17:49, 6 October 2019 diff hist +178 ADF435x PIC PICKIT3 orientation
- 17:44, 6 October 2019 diff hist +51 ADF435x PIC →Using a Chinese Pickit 3
- 17:42, 6 October 2019 diff hist +98 N File:20191002 PICKIT3 FITTED TO PROJECT BOARD.jpg Picture shows the orientation of the board for in-circuit programming with a Pickit3 current
- 19:07, 21 September 2019 diff hist +50 m 71 MHz
- 20:33, 17 September 2019 diff hist +341 The Portsdown Receiver
- 20:20, 17 September 2019 diff hist +59 N File:M0YDH TERRESTRIAL RX MENU.jpg Terrestrial Rx menu - Portsdown 2019 by M0YDH current
- 20:17, 17 September 2019 diff hist +30 m The Portsdown Receiver QO-100 menu
- 20:14, 17 September 2019 diff hist +53 N File:M0YDH QO-100 Rx menu.jpg QO-100 Rx Menu -Portsdown 2019 by M0YDH current
- 19:21, 1 May 2019 diff hist +376 71 MHz →Receiver: EZ samples
- 11:33, 23 April 2019 diff hist +265 71 MHz →Receiver: mini-circuits sources
- 20:46, 13 April 2019 diff hist +111 Es'hail-2 LNBs and Antennaes →Suitable 25 MHz Reference current
- 20:31, 13 April 2019 diff hist +36 N File:20190413 163955 (Small).jpg Rear Panel - Portsdown 2019 by M0YDH current
- 20:29, 13 April 2019 diff hist +33 N File:20190413 M0YDH (Small).jpg A Portsdown 2019 DATV transmitter current
- 20:27, 13 April 2019 diff hist +54 N File:20190413 164004 (Small).jpg A Portdown 2019 Transmitter by M0YDH - 8 way RF switch current
- 20:26, 13 April 2019 diff hist +37 N File:20190413 180639 (Small).jpg A Portsdown 2019 transmitter by M0YDH current
- 20:22, 13 April 2019 diff hist +40 N File:20190413 180629 (Small).jpg Portsdown 2019 with 3.5" screen by M0YDH current
- 15:35, 3 February 2019 diff hist +391 23cms ATV →23cms FM ATV equipment: 3 other makes of FM transmitter current
- 13:26, 2 February 2019 diff hist +103 Using LimeSDR with Portsdown →WARNING - High Power Output During Calibration Before Transmit: video
- 12:48, 2 February 2019 diff hist +1 8-Band RF Output Switch →Version 2 PCBs
- 12:48, 2 February 2019 diff hist +89 m 8-Band RF Output Switch →Version 2 PCBs
- 12:45, 2 February 2019 diff hist +94 8-Band RF Output Switch →Version 2 PCBs: V2.3 assembled board pictures
- 12:41, 2 February 2019 diff hist +42 N File:20190201 182818-1008x756.jpg Underside of V2.3 8 band RF switch - M0YDH current
- 12:40, 2 February 2019 diff hist +40 N File:20190201 182759-1008x756.jpg 8 Band RF Switch V2.3 assembled by M0YDH current
- 18:42, 31 January 2019 diff hist +14 m Output Attenuator →RF Connections: or Lime SDR
- 19:11, 30 January 2019 diff hist +303 8-Band RF Output Switch →Version 2 PCBs
- 19:06, 30 January 2019 diff hist +76 8-Band RF Output Switch →Version 1 PCBs: New Parts List
- 18:47, 30 January 2019 diff hist +116 N File:8 BAND RF SWITCH V2.2 PARTS.xls 8 Band RF switch parts lists for Portsdown filter modulator V2.2 and alternatively Lime Mini SDR - V2.3 per CQ-TV262 current
- 21:55, 18 November 2018 diff hist +135 Mapping tools →Radio link and path software
- 21:52, 18 November 2018 diff hist +45 N File:Cleeve Common to Titterstone Clee Hill.JPG Screenshot of Microwave Path Profile by G0MJW current
- 21:34, 18 November 2018 diff hist +938 Mapping tools →Radio link and path software: G0MJW's path profile
- 18:19, 22 May 2018 diff hist +802 Mapping tools →Finding line of sight paths: Radio Mobile and MicroDEM
- 19:19, 7 May 2018 diff hist +34 m 23cms filters DB6NT LPF
- 19:11, 7 May 2018 diff hist +952 23cms filters DB6NT PCB 58 low pass filter
- 18:48, 7 May 2018 diff hist +66 N File:DB6NT 23cm low pass filter.jpg Michael Kühner's PCB number 58 is a LPF and coupler for 23cm band current
- 18:20, 21 February 2018 diff hist +1,954 N Lean DVB receiver Reinstate the text (from Google search cached pages) to enable users to find CQTV 252 article
- 18:13, 21 February 2018 diff hist +1,954 N Talk:Lean DVB receiver Reinstate the text (from Google search cached pages) to enable users to find CQTV 252 article current
- 21:55, 30 January 2018 diff hist +252 PTT and band switching →Tx Rx sequencer: TROPIC
- 21:46, 30 January 2018 diff hist +170 m Antennae changeover relays →Tx / Rx sequencing: TROPIC
- 12:07, 6 January 2018 diff hist +242 m PTT and band switching →Tx Rx sequencer: ADD link to video of device in operation
- 17:04, 5 December 2017 diff hist +325 m 23cms filters add photo of my version of BPF
- 19:52, 30 November 2017 diff hist +46 N File:20171126 GM8OTI BPF 23cm (Small).jpg 23 cm bandpass filter to design by John GM8OTI current
- 21:05, 18 October 2017 diff hist +108 m PE4302 add link to my film
- 21:56, 17 October 2017 diff hist +270 PE4302 attenuator preparation
- 21:48, 17 October 2017 diff hist 0 File:PE4032 DIP & SOLDER BLOB Settings.JPG M0YDH uploaded a new version of File:PE4032 DIP & SOLDER BLOB Settings.JPG current
- 14:28, 16 October 2017 diff hist +76 N File:PE4032 DIP & SOLDER BLOB Settings.JPG Attenuator switch and J solder pads for serial operation with the controller
- 07:34, 22 September 2017 diff hist +162 m Analog Video Output What's on Dave's Portsdown - hoping for a photo
- 07:29, 22 September 2017 diff hist +84 m Analog Video Output Refer to 5.6GHz FPV transmitter
- 18:37, 19 September 2017 diff hist +288 70cms filters →Simple inter-digital filter
- 18:20, 19 September 2017 diff hist +10 m 5.6 GHz →Activity hot spots
- 19:05, 14 September 2017 diff hist +288 N File:20170908 145937 M0HMO power meter.jpg Power Meter designed by Heather M0HMO for the GQRP 2017 Buildathon is shown here displaying the "20watts" FM setting of a FT857D into its high power port. The Arduino Uno computer controlled meter reads dBm, mW and W on all amateur bands 160m to 70cm i... current
- 18:58, 14 September 2017 diff hist +312 N 70MHz filters 4m filter page
- 18:55, 14 September 2017 diff hist +18 m Filters →Filters for each band
- 18:53, 14 September 2017 diff hist +151 146 MHz filters
- 18:38, 14 September 2017 diff hist +98 N File:20170914 QRP Labs 4m and 2m LPF.jpg Low pass filter kits from QRP-Labs built by M0YDH for Portsdown TX use. 4m on left and 2m on right current
- 18:34, 14 September 2017 diff hist +262 146 MHz filters 2m BPF from CAT17 illustrated
- 18:27, 14 September 2017 diff hist +153 N File:20170914 CQTV250 2m BPF M0YDH.jpg 2m Band Pass filter built by David M0YDH to the instructions in CQTV250. Red coupling wire by Noel G8GTZ at CAT17 workshop gives the correct performance! current
- 18:03, 14 September 2017 diff hist +283 5.6 GHz Pic of Crump transceiver detail at CAT17
- 17:56, 14 September 2017 diff hist +82 N File:20170910 103215 G8GKQ TXCR 6cm AT CAT17.jpg G8GKQ 6cm Transceiver - receiver unit on left & transmitter with fan on the right. current
- 17:55, 14 September 2017 diff hist +71 5.6 GHz
- 18:08, 11 September 2017 diff hist +107 m 146 MHz filters →Manufacturers of 144 - 148 MHz filters
- 18:03, 11 September 2017 diff hist +44 m 146 MHz filters →A simple DIY filter was originally published in the RSGB VHF manual and described in CQ-TV 250
- 22:03, 23 May 2017 diff hist +83 m Filter Modulator build Heatsink type
- 18:06, 21 January 2017 diff hist +394 m MiniTioune →Software Installation
- 17:40, 21 January 2017 diff hist -1 MiniTioune →Software Downloads