| AA9TT | Ham Radio, Vintage Tube Audio Equipment |
| Amateur Radio Education Alliance | Information |
| Bill's Ham Radio | Tube Database, Manuals |
| Bill's Ham Radio | Tube Database, Manuals, mirror link |
| Broadcasting From The Home! | Ham Radio |
| Chevet Supplies Ltd. | Vintage Tube Audio Equipment |
| Elettronica ED ST62 | Schematics, Ham Radio |
| Friedrich T. Sommer | Ham Radio, Vintage Tube Audio Equipment |
| Funkamt Flensburg | Schematics, Tube Comparison List, Links, Tube Radios & Related Vintage Items |
| Geloso | Geloso schematics |
| Harold Layer | Ham Radio |
| Harry's Boatanchor Pages | Ham Radio |
| HB9BBD - Amateur Radio Moonbounce | Amateur Radio Site |
| Heart Land | Ham Radio |
| homebrew, digital tecniques and contest | Ham Radio |
| Jannes homepage | DIY Tube Audio Site, Ham Radio |
| K9GD Home Page - Streamwood, Illinois | Amateur Radio Station |
| Kazuhiro Sunamura | Radio Amateur |
| Knight-Kit | Ham Radio |
| N4AHN REPEATER-REMOTE | Ham Radio |
| N5IW | Ham Radio |
| ND2X - QRO via Russia + Mobile Ops | Ham Radio |
| Nick England | Ham Radio |
| Oppermann Electronic | Parts |
| Play Things Of Past | Tubes, Parts |
| Radio Bay | National Radio Company |
| Radio Broadcast Transmitters | Ham Radio |
| Radio Doc's | Ham Radio |
| Radio Experimenters Page | DIY Tube Audio Site, Ham Radio |
| RigPix Database | Ham Radio |
| TDP | Ham Radio |
| Tech Bench | Ham Radio |
| The AM Window | Ham Radio, Forum, Links |
| The Knight Kit Page | Ham Radio |
| The Old Tube Radio Nework | Old tube radios, Tube Boxes |
| Udo s oldradio | Vintage Radio Collector |
| Universal Radio | Ham Radio |
| W0VLZ | DIY Ham Radio |
| WA5CMI | Ham Radio |
| WA7ZCZ | Information |
| WA9WFA SW-3 and Classic Radio | Ham Radio, Tube Radios & Related Vintage Items |
| WB4QXE | Ham Radio |
| Yamamoto -JA1JTA Home Page | Ham Radio History |