| Uploaded | Radio | Model/Category | Description |
| 22 Sep 2002 | Drake | R-4C | Still the finest competion-grade receiver |
| 20 Feb 2000 | Kenwood | DG-5 | DG-5 Standard service procedure |
| 27 Apr 2017 | Kenwood | GENERAL | Kenwood hybrid final amplifier voltages |
| 17 Mar 2016 | Kenwood | GENERAL | Kenwood tube hybrid final amplifier voltage checks |
| 19 Sep 2014 | Kenwood | GENERAL | Brief Guide to the Kenwood Hybrid Transceivers |
| 11 May 2009 | Kenwood | GENERAL | Replacement of cathode resistors in Kenwood hybrids |
| 18 Mar 2000 | Kenwood | SM-220 | SM-220 Shield Installation |
| 20 Feb 2000 | Kenwood | TS-120 | TS-120S, TS-180S phone patch terminal addition |
| 19 Jul 1998 | Kenwood | TS-120 | Hum in SSB TX, TS-120S and others |
| 20 Feb 2000 | Kenwood | TS-180 | TS-120S, TS-180S phone patch terminal addition |
| 28 Apr 2008 | Kenwood | TS-520 | Kenwood TS-520, 530, 820 & 820 series transceivers |
| 03 Apr 2008 | Kenwood | TS-520 | Interaction of ALC and NFB in the Kenwood Hybrids TS-520 - TS-830S |
| 20 Jan 2008 | Kenwood | TS-520 | Kenwood TS-520 Series, Possibly other Valve Models. |
| 01 Apr 2007 | Kenwood | TS-520 | TS-520 / 820 Series PA Modifications |
| 01 Sep 2005 | Kenwood | TS-520 | Kenwood TS-520 Power connector |
| 30 Mar 2001 | Kenwood | TS-520 | Increase the semsitivity for 10 and 15 meter band |
| 02 Apr 2000 | Kenwood | TS-520 | DS-2 Replaces DS-1A DC-DC Converter |
| 18 Mar 2000 | Kenwood | TS-520 | Adding IF output to the TS-520 and TS-520S tranceivers for use with th SM-220 |
| 20 Feb 2000 | Kenwood | TS-520 | TS-520/520S BS-5 Sweep interference |
| 12 Feb 2000 | Kenwood | TS-520 | TS-520 Novice Operation (75 watts) |
| 12 Feb 2000 | Kenwood | TS-520 | AM Broadcarst interferenc in TS-520 |
| 05 Jun 1999 | Kenwood | TS-520 | TS-520S MARS Mod for 4.0-4.6MHz |
| 05 Apr 1999 | Kenwood | TS-520 | Kenwood TS-520S for QRP |
| 19 Jul 1998 | Kenwood | TS-520 | TS-520, TS-820 CW filter select control |
| 19 Jul 1998 | Kenwood | TS-520 | DG-5 Standard Service Procedure |
| 19 Jul 1998 | Kenwood | TS-520 | Service notes on TS-520 |
| 19 Jul 1998 | Kenwood | TS-520 | TS-520S -6v Supply Failure |
| 19 Jul 1998 | Kenwood | TS-520 | TS-520/520S CW Frequency Shift |
| 19 Jul 1998 | Kenwood | TS-520 | TS-520 Increased sensitivity, Better audio and Amplitude Modulation |
| 30 Jun 2010 | Kenwood | TS-530 | Improved mic audio mods for TS-530/830 |
| 28 Apr 2008 | Kenwood | TS-820 | Kenwood TS-520, 530, 820 & 820 series transceivers |
| 01 Apr 2007 | Kenwood | TS-820 | TS-520 / 820 Series PA Modifications |
| 02 Apr 2000 | Kenwood | TS-820 | DS-2 Replaces DS-1A DC-DC Converter |
| 19 Jul 1998 | Kenwood | TS-820 | TS-520, TS-820 CW filter select control |
