Here are the updates, additions and corrections to HHH in reverse date order.
| dd-mmm-yyyy | Section | information |
|---|---|---|
| 23-Sep-2025 | use | 5 Additions/mods to old (& new) RC systems |
| 02-Jan-2025 | Start | Added YouTube videos to start page |
| 24-Jun-2024 | tx | Corrections to TX Filters diagrams |
| 24-Apr-2024 | use | Arduino RC servo tester / 1-CN encoder |
| 24-Apr-2024 | use | Arduino RC RC encoder 6-CH (8-CH) |
| 24-Apr-2024 | use | RC servo tester / 1-CN encoder |
| 05-Mar-2024 | Antennas | 3D printed portable HF antenna |
| 03-Feb-2024 | Audio | Quick AF source from your RF generator |
| 03-Feb-2024 | Audio | Retro Audio Amplifier - useful on the workbench |
| 03-Feb-2024 | Useful | Custom (bespoke) capacitor values |
| 02-May-2023 | Basic info | Ferrites for RF |
| 19-Feb-2023 | Antennas | RF Windows Cable Transition |
| 01-Aug-2022 | TX | 200mW VHF FM TX with eliptic filter |
| 01-Aug-2022 | Basic info | Pathlosses explained (with example / graph) |
| 20-Apr-2022 | TX | Basic TX Filters for HF/VHF |
| 20-Feb-2022 | PIC | PIC based CTCSS + RTTY / AFSK Encoder |
| 20-Feb-2022 | Links | Removed dead and commercial links |
| 20-Feb-2022 | Various | Corrected code in 38 files (generated by Teleport) |
| 04-Feb-2021 | Antennas | HF antennas for small spaces |
| 04-Feb-2021 | Power | Transformer design and construction |
| 04-Feb-2021 | Power | (Fun with) Voltage regulators |
| 16-Oct-2020 | AF/Amps | Microphone Processor - Updated with PCB drawings |
| 23-Sep-2020 | AF/Amps | Microphone Processor |
| 08-Dec-2019 | AF/Amps | AF Generator (retro design) |
| 25-Nov-2019 | Useful | CMOS Scope Timebase |
| 08-Dec-2018 | TX | 160mW FM TX & PA by Joy Mukherji |
| 08-Dec-2018 | All | Updated URL to forumotionmessageboard |
| 10-Nov-2018 | TX | 96MHz FM TX & PA by Joy Mukherji |
| 01-Jul-2018 | 3D | 3D printed 10KV Tuning Capacitor for 20m antenna |
| 10-Jun-2018 | antennas | Update to "20 metre frame antenna (small)" |
| 01-Jul-2018 | 3D | 3D printed 6-pole Jones plug for FT-101ZD |
| 10-Jun-2018 | Useful | PIC based Frequency Counter (0 to 60MHz) |
| 13-Oct-2017 | 3D | New section "3D" added |
| 13-Oct-2017 | 3D | 3D Printed Denco-style coil substitute |
| 15-Sept-2017 | Power | Simplified DIY Transformers for tubes |
| 12-Apr-2017 | Antennas | 20 metre frame antenna (small) |
| 26-Feb-2017 | General | Minor corrections to HTML scripts |
| 15-Feb-2017 | Useful | GDO revisited (GDO-2) |
| 05-Feb-2017 | Building Blocks | No to Zeners & regulators |
| 07-Jan-2017 | Reference | 78L05 Regulators in Use & Misuse |
| 07-Jan-2017 | AF/Amps | 78L05 Push-Pull Amplifier (AF / RF) |
| 30-Jan-2016 | Info | HF marker / generator. |
| 27-Mar-2014 | Info | Hamradio and deafness. |
| 30-Jul-2013 | Data/tech | HF & VHF PA Z-matching calculations. |
| 27-Jun-2013 | Spy Shop | Updated the spy toys shop. |
| 18-Dec-2012 | Booze | The "McGuyver" holiday refrigerator. |
| 17-Oct-2012 | Amplifiers | Cascade / Cascode LF/IF Amplifier stage. |
| 16-Jun-2012 | Usefull | PIC based R/C servo/decoder exerciser |
| 30-Apr-2012 | Download | PIC based DC/AC (9v/24v/36v to 117v/230vAC) Mk-III |
| 09-Feb-2012 | Download | PIC based DC/AC (12v/24v to 117v/230vAC) Mk-II |
| 06-Jun-2011 | Power | Charger / Bench PSU. |
| 17-Apr-2010 | Download | PCB for PIC based DC/AC (12v/24v to 117v/230vAC). |
| 23-Feb-2010 | Power | New project - PIC based DC/AC (12v/24v to 117v/230vAC). |
| 26-Oct-2009 | General | Whole site moved to new address after Telia shut down my web pages. |
| 26-Oct-2009 | General | New domain added (www.sm0vpo.com). Several links corrected. |
| 23-Apr-2009 | Power | New project - Push-pull inverter (12v/24v to 117v/230vAC). |
| 29-Dec-2008 | Blocks | New project - LED VU/Volt-meter. |
| 13-Nov-2008 | Synthesisers | New project, diode/CMOS synthesiser (to 1.2GHz). |
| 12-Nov-2008 | Supply | Removed dead links. |
| 01-Nov-2008 | Forum | New forum at http://sm0vpo.wahlberg.cc added. |
| 17-Sep-2008 | Supply | New datasheet link added. |
| 26-May-2008 | Power | New page - DIY Transformers. |
| 13-Apr-2008 | Data/Technique | New page - Diode Switching Basics. |
| 23-Feb-2008 | Data/Technique | New page - Estimating tuned circuits. |
| 23-Feb-2008 | Info | E-mail addresses changes to eliminate SPAM. |
| 23-Feb-2008 | Use ++ | Added supplier links and more info to RC project. |
| 17-Jan-2008 | Antennas | Added new 7dBd VHF colinear antenna. |
| 06-Aug-2007 | Download | Added PCB foil for DC-AC 10W-1000W. |
| 30-Jul-2007 | PSU | Added project DC-AC 10W-1000W. |
| 10-Jul-2007 | Various | Corrections to text & code. |
| 05-Jul-2007 | Main page | GOOGLE search code added. |
| 28-Mar-2007 | PSU / Power | Alternative Power article added. |
| 05-Mar-2007 | TX | 100mW Television TX. |
| 14-Feb-2007 | PSU | 1-Off mains timer modification added. |
| 29-Jan-2007 | Useful CCTS | Plumbing pipe tuned circuits - 510MHz Hartley added. |
| 23-Jan-2007 | Useful CCTS | Plumbing pipe tuned circuits - 200MHz Hartley added. |
| 09-Jan-2007 | Useful CCTS | Plumbing pipe tuned circuits. |
| 01-Jan-2007 | Start page | Visitors counter info. |
| 21-Aug-2006 | Basic info | Circuit calculations - worked example. |
| 27-Jul-2006 | Useful | DIY Preset Capacitors. |
| 20-Jul-2006 | Useful | DIY Tuning Capacitors. |
| 18-Jul-2006 | Useful | Analogue R/C PCB added to Download. |
| 09-Jul-2006 | Useful | Analogue R/C of models. |
| 11-Mar-2006 | Audio | 250mW AF Amp. |
| 13-Feb-2006 | TX | Television TX. |
| 27-Aug-2005 | TX | 40mW VHF TX (stable/versatile). |
| 27-Aug-2005 | Download | 222 Stereo Encoder PCB foil. |
| 27-Aug-2005 | Download | PCB CAD - Donated by Youssef TOUIL |
| 29-Jun-2005 | AF / Amps | 222 Stereo Encoder. |
| 08-Jan-2005 | Data / Tech | ESD Protection. |
| 30-Dec-2004 | Information | Updated counter and HHH info. |
| 31-Oct-2004 | Several different | Minor updates and corretions to the site |
| 06-Oct-2004 | Amplifier circuits | 400mW 100MHz Power amplifier |
| 24-Sep-2004 | Antennas | New project - VPO-le |
| 23-Jul-2004 | PCB Video | CD brought back to life in VCD format |
| 22-Jul-2004 | All sections | Corrected over 160 bad links !! |
| 21-Apr-2004 | DIY IF Cans for Valves | New project |
| 28-Feb-2004 | About HHH | Data updated |
| 28-Feb-2004 | Maj-Lis and me | Data updated |
| 07-Feb-2004 | Messageboard | New messageboard added. |
| 13-Dec-2003 | Download section | Added PCB foil for Basic RF linears amps. |
| 20-Oct-2003 | Links & Suppliers | Removed Wabbe's homepages (site closed) |
| 18-Sep-2003 | WAV to EPROM | Corrections to data & cct. |
| 14-May-2003 | Amplifier Projects | AF Level Meter. |
| 11-May-2003 | Amplifier Projects | Gramaphone (record) pickup preamplifier. |
| 12-Apr-2003 | TX Projects | Basic QRP HF Linear Amplifier designs. |
| 05-Feb-2003 | Loads | Loads of minor corrections (tipping errors, etc). |
| 12-Jan-2003 | Start page | New improved "easy navigate" start page. |
| 10-Jan-2003 | EPROMS | Added chip pinout data for 27256 |
| 08-Jan-2003 | Receivers | Added new project - Easy MW reflex rx |
| 01-Jan-2003 | Basic Info | "Ugly" construction method |
| 31-Dec-2002 | Infomation | Counter reset for new-year |
| 31-Dec-2002 | Building Blocks | Easy HF Oscillator |
| 30-Oct-2002 | TX(V6) & Begin(OpAmps) | Minor corrections |
| 14-Oct-2002 | Download | Added V7(broadcast) PCB. |
| 14-Oct-2002 | Transmitters | Added V7(broadcast) project. |
| 16-Sep-2002 | Download | Added AM/CW/RC transmitter PCB. |
| 08-Sep-2002 | Transmitters | Added new AM/CW/RC transmitter. |
| 24-Jul-2002 | Downloads | Moved to new server (no banners) |
| 07-Jul-2002 | PSU | Updated project - Voltage Converters. |
| 07-Jul-2002 | Download | Voltage converter PCBs added. |
| 05-Jul-2002 | PSU | New project - Voltage Converters. |
| 20-Jun-2002 | Faq / Fasq | Updated and split into FAQ + FASQ. |
| 15-Jun-2002 | Main | New messageboard. |
| 21-May-2002 | E.. loads!! | Hamcom PCB added + about 35 corrections |
| 01-May-2002 | EPROM | New WAV 2 EPROM project added. |
| 25-Apr-2002 | Kits | New CMOS synth kit added. |
| 25-Apr-2002 | supply | 2 new links added. |
| 25-Apr-2002 | W5WWW vote | New banner (faster download). |
| 18-Mar-2002 | Search Engine | New Search Engine added |
| 29-Dec-2001 | MessageBoard | Change to new messageboard |
| 29-Dec-2001 | About HHH | Annual stats for 2001 added |
| 19-Dec-2001 | Transmitters | 150mW WBFM TX V7 updated |
| 13-Dec-2001 | Download | Higher power WBFM V7 PCB foil added |
| 11-Dec-2001 | Transmitters | Higher power WBFM TX V7 added |
| 04-Nov-2001 | Download | Synthesised WBFM TX V6 PCB added |
| 27-Oct-2001 | Transmitters | Synthesised WBFM TX V6 added |
| 07-Oct-2001 | Basic Info | How feeders (Transmission lines) work |
| 25-Sept-2001 | Amplifiers | 10-watt HF linear photographed/updated |
| 15-Sept-2001 | Begin | Transistor Biasing - 2 added |
| 01-Sept-2001 | Download | Layo01 deleted (too big) |
| 01-Sept-2001 | w1.859.telia.com/~u85920178 | New site added |
| 01-Sept-2001 | http://sm0vp0.8m.com | DOWNLOAD files deleted |
| 21-July-2001 | Synthesizers | Practical circuits added |
| 21-July-2001 | Basic info | Op-Amp tutorial added |
| 28-May-2001 | All | Freeservers removed from homepages |
| 17-Apr-2001 | Synthesizers | Corrections to VCO circuit |
| 17-Apr-2001 | Antennas | Impedance bridge added |
| 17-Apr-2001 | Antennas | Antenna FASQ added |
| 24-Mar-2001 | Synth + Begin | Corrections to example info |
| 11-Mar-2001 | EPROMS | EPROM AF Generator added |
| 17-Feb-2001 | Kits | Kits page updated - G0TLA included |
| 17-Feb-2001 | All | Frames pages added |
| 06-Feb-2001 | PCBs | Removed JAVA script from PCB library |
| 06-Feb-2001 | synthesizers | Improved CMOS Synthesizer |
| 06-Feb-2001 | Info | Revision History page |