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- 13:46, 22 December 2023 diff hist 0 m Portsdown hardware →Audio Capture Device current
- 13:46, 22 December 2023 diff hist +29 m Portsdown hardware →Audio Capture Device
- 13:43, 22 December 2023 diff hist +2 m Portsdown hardware →Audio Capture Device
- 13:42, 22 December 2023 diff hist +197 Portsdown hardware →Audio Capture Device: T-R-S microphones
- 15:35, 31 March 2023 diff hist +1 m Gerber Files →G0MJW's HF3 relay board current
- 15:35, 31 March 2023 diff hist -156 m Gerber Files →G0MJW's HF3 relay board
- 17:42, 28 February 2023 diff hist +54 m Gerber Files →M0RNW's G8TA Rx/Tx Changeover Controller Board
- 17:41, 28 February 2023 diff hist +1 m Gerber Files →M0RNW's G8TA Rx/Tx Changeover Controller Board
- 17:41, 28 February 2023 diff hist +140 m Gerber Files →M0RNW's G8TA Rx/Tx Changeover Controller Board
- 17:39, 28 February 2023 diff hist +603 Gerber Files G8TA Rx/Tx Changeover Controller Board
- 17:29, 28 February 2023 diff hist +82 N File:RxTxChangeoverV1.ino Sketch for Nano V3 for G8TA Rx/Tx Changeover controller by Ron M0RNW current
- 17:23, 28 February 2023 diff hist +45 N File:G8TA Portsdown RxTx Changeover -1.jpg Assembled changeover controller current
- 21:29, 27 February 2023 diff hist +61 N File:RxTx-Changeover.pdf revised 20230207.pdf M0RNW changeover controller schematic CQ-TV 279 current
- 21:27, 27 February 2023 diff hist +76 N File:Rx-Tx Changeover Gerbers.zip Gerbers for the M0RNW Rx-Tx changeover controller in CQ-TV 279 current
- 21:23, 27 February 2023 diff hist 0 m Gerber Files →G0MJW's HF3 relay board
- 21:22, 27 February 2023 diff hist +142 Gerber Files HF3 relay board #2
- 21:20, 27 February 2023 diff hist +49 N File:HF3 relay board gerbers.zip Gerbers for SPDT relay PCB by G0MJW current
- 21:18, 27 February 2023 diff hist +45 N File:HF3 Relay board.JPG KiCAD image of G0MJW design PCB current
- 21:17, 27 February 2023 diff hist +361 Gerber Files HF3 relay board #1
- 18:33, 24 February 2023 diff hist +67 m 51 MHz →51 MHz DATV Introduction current
- 18:31, 24 February 2023 diff hist +18 m 51 MHz
- 18:28, 24 February 2023 diff hist +155 m 51 MHz low pass filter
- 18:19, 24 February 2023 diff hist +1,090 N 51 MHz Initial details
- 18:08, 24 February 2023 diff hist +13 BATC Wiki →The ATV bands: 6m page link added
- 17:00, 30 January 2023 diff hist -5 m 29MHz transverter →PCBs: tense change current
- 16:58, 30 January 2023 diff hist -6 m 29MHz transverter 1590B box
- 21:47, 19 January 2023 diff hist +109 29MHz transverter →BOM and schematics: tcxo on EBay
- 21:41, 19 January 2023 diff hist +84 29MHz transverter die cast box
- 19:58, 8 December 2022 diff hist +116 Assembling Portsdown →Mechanical Design current
- 19:56, 8 December 2022 diff hist +64 m Assembling Portsdown →Mechanical Design
- 19:30, 8 December 2022 diff hist +495 Assembling Portsdown front panel model link
- 19:22, 8 December 2022 diff hist +367 N File:Portsdown 3 Front Panel.zip Here is a .DXF file and a .stp model to load into your CAD software. It is for a 19 inch rack 3U front panel for a Portsdown 2019 with 7" Screen mounted in a G4XAT bezel. Probably the engraving will fail to load. It will import into Front Panel Designer from Schaeffer. STEP files are neutral format CAD models so ought to load into any 3D CAD software. current
- 19:24, 9 September 2022 diff hist +104 71 MHz →Equipment for 71MHz DATV: cost of a converter system current
- 17:19, 9 September 2022 diff hist +255 Portsdown hardware →Optional RPi camera Extension Lead Kit: Pimoroni is the only possible stockist
- 14:07, 12 August 2022 diff hist +15 m 71 MHz →Antennas
- 14:03, 12 August 2022 diff hist +105 71 MHz →Antennas: 6m url too
- 14:02, 12 August 2022 diff hist -20 71 MHz →Antennas: revised URL
- 13:46, 12 August 2022 diff hist +602 71 MHz →Receiver: M0YDH upconverter number 2
- 13:31, 12 August 2022 diff hist +177 m Portsdown 2018 →Portsdown 2018 User guide current
- 13:29, 12 August 2022 diff hist +169 m Portsdown 2018 P2018 works reliably
- 13:21, 12 August 2022 diff hist +35 Assembling Portsdown →Mechanical Design
- 13:20, 12 August 2022 diff hist +644 Assembling Portsdown →Mechanical Design: P2018 on 2 sides of a PCB
- 13:01, 12 August 2022 diff hist +404 Assembling Portsdown →Mechanical Design: 3U 19 inch rack case
- 12:55, 12 August 2022 diff hist +152 N File:P2020 M0YDH 04.jpg OTHER SIDE OF P2018 CARD MOUNTS THE RF SWITCHES AND ATTENUATOR. A 25 WAY D SOCKET MAKES THE OFF BOARD CONNECTIONS TO THE PI BREAKOUT BOARD current
- 12:53, 12 August 2022 diff hist +99 N File:P2020 M0YDH 03.jpg PORTSDOWN 2018 MAIN CIRCUIT CARDS MOUNTED ON A PLAIN PCB FOR FITTING IN A 3U 19" RACK current
- 12:52, 12 August 2022 diff hist +110 N File:P2020 M0YDH 02.jpg PORTSDOWN 2020 UNDER CONSTRUCTION IN A 3 U 19" RACK CASE 2 WAY SWITCH, ATTENUATOR, 4 WAY SWITCH current
- 12:50, 12 August 2022 diff hist +70 N File:P2020 M0YDH 01.jpg PORTSDOWN 2020 UNDER CONSTRUCTION IN A 3 U 19" RACK CASE current
- 12:49, 12 August 2022 diff hist +50 N File:M0YDH Upconverter.jpg 71MHz UPCONVERTER LAID OUT ON A CARD current
- 17:56, 14 October 2021 diff hist +148 m QO100 DATV Users m0ydh & g8vzt added
- 18:05, 29 September 2021 diff hist +73 m PE4302 current
- 18:02, 29 September 2021 diff hist +46 m PE4302
- 18:00, 29 September 2021 diff hist +242 PE4302 Old versions of MPLAB IDE
- 11:55, 26 June 2021 diff hist +173 m 23cms filters →3 and 5 pole filters: brass screws current
- 16:51, 22 June 2021 diff hist +25 m Portsdown 4 →Hardware build
- 16:49, 22 June 2021 diff hist +124 Portsdown 2020 →Hardware build: shortcut to 2019 hardware page current
- 14:00, 20 June 2021 diff hist +107 m 23cms filters →3 and 5 pole filters
- 13:58, 20 June 2021 diff hist +158 m 23cms filters →3 and 5 pole filters
- 13:50, 20 June 2021 diff hist 0 23cms filters →3 and 5 pole filters
- 13:49, 20 June 2021 diff hist -5 23cms filters →3 and 5 pole filters
- 13:47, 20 June 2021 diff hist +633 23cms filters 5 pole filter
- 13:31, 20 June 2021 diff hist +101 N File:1255 Interdigital filter 3.jpg M0YDH build of W6PQL filter in a die cast box. Cables and coupler only were at -9.75dBm current
- 13:30, 20 June 2021 diff hist +59 N File:1255 Interdigital filter 2.jpg M0YDH build of W6PQL filter in a die cast box current
- 13:29, 20 June 2021 diff hist +59 N File:1255 Interdigital filter 1.jpg M0YDH build of W6PQL filter in a die cast box current
- 17:38, 17 April 2021 diff hist +360 70cms filters RBP-440 current
- 17:32, 17 April 2021 diff hist +369 146 MHz filters RBP-140 current
- 17:22, 17 April 2021 diff hist +255 70MHz filters RBP-75 current
- 17:12, 17 April 2021 diff hist +31 m MiniTioune →Hardware overview
- 17:11, 17 April 2021 diff hist +69 m MiniTioune →Hardware overview
- 17:08, 17 April 2021 diff hist +208 m MiniTioune →Hardware overview: CQ-TV 269
- 17:02, 17 April 2021 diff hist +3 m MiniTiouner hardware Version 1 →Serit NIM Adapter card current
- 14:58, 17 April 2021 diff hist +97 m Serit LNB DC supply →LNB power supply with current limit for MiniTiouner current
- 14:56, 17 April 2021 diff hist +121 Serit LNB DC supply →LNB power supply with current limit for MiniTiouner: low voltage fault condition
- 12:07, 5 April 2021 diff hist +155 Willow components breakout card Portsdown 4 current
- 11:50, 5 April 2021 diff hist -16 Portsdown 4 GPIO Connections →List of GPIO connections: SR Pins
- 18:22, 14 February 2021 diff hist +184 m Portsdown 4 GPIO Connections →GPIO Connections for the Portsdown 4: 2 way RF switch
- 22:12, 8 February 2021 diff hist +2 m Portsdown 4 GPIO Connections →GPIO Connections for the Portsdown 4
- 22:04, 8 February 2021 diff hist +107 Portsdown 4 GPIO Connections →GPIO Connections for the Portsdown 4: link to gp io pcb page
- 21:54, 8 February 2021 diff hist +51 m Portsdown 4 GPIO Connections →GPIO Connections for the Portsdown 4
- 21:50, 8 February 2021 diff hist +75 Portsdown 4 GPIO Connections →RPi 4 GPIO pin out
- 21:45, 8 February 2021 diff hist +504 m Portsdown 4 GPIO Connections →GPIO Connections for the Portsdown 4: breakout board terminal block notes
- 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