| G T Audio | Tube Amplifiers Services, Retailer |
| Gabe's Tubes 'n' Stuff | Information and DIY Tube Amplifiers |
| Galen Carol Audio | Speakers |
| Gary Pimm | DIY Tube Amplifiers, Schematics |
| Gary's Audio Pages | DIY Tube Amplifiers, Schematics |
| Gary's Vacuum Tube Web Page | Tube Audio Information |
| GC Elettronica | Tube Amplifier Kits, Transformers |
| Geloso | Geloso schematics |
| Genelec Active Surround Sound Monitoring | Speakers |
| General Semiconductor Inc. | Diodes, Voltage Regulators |
| Generating X-Rays with Receiving Tubes | Article |
| GenzBenz and TubeWorks | Tube Guitar Amplifiers |
| GEO - the Guitar Effects Oriented Web Page | Tube Amplifiers Services, Tubes, Effects |
| Georg Neumann GmbH | Tube Microphones |
| Gerard's Radio Corner | Old Radio Collection |
| Gerhart Amplification | Tube Guitar Amplifiers |
| Gerlitz Amplification | Tube Guitar Amplifiers |
| Gesellschaft der Freunde der Geschichte des Funkwesens GFGF e.V. | History about Radio Broadcast |
| GG Audiodesign | Tube Amplifiers |
| Gibson Musical Instruments | Tube Guitar Amplifiers |
| Giulio Maiocco | Tube Radios & Related Vintage Items |
| Glasscase Amplifiers | Tube Amplifier Kits |
| GlassWare | Audio Design Software |
| Glenn Baddeley - Electronics | Links |
| Glenn Baddeley - Electronics | Links, DIY Tube Amplifiers |
| GLIM Audio | Tube Amplifiers |
| GLIM Audio homepages! | Tube Amplifiers, Tubes, Parts |
| Globe Electronic Hardware | Standoffs |
| Globex - Russian Electronic Exporter | Tubes, Parts |
| Glowbugs Galore | Glowbugsgalore webring |
| GMA | Tube Preamplifier, Tube DAC |
| GMF | Retailer, Tubes |
| GOFF Professional Online | Equipment for Professionals |
| GOLDEN MIDDLE | Tube Amplifiers, Transformers, Tubes |
| Golden Sound | Cones |
| Golden Tube Audio | Tube Amplifiers |
| Goldpoint Audio Controls | High Performance Attenuator |
| GoodSound | Audio Guide |
| Gootee Electronic surplus | Tubes, Radio Collection |
| Gotham Audio Cables | Cables, Prof. Equipment |
| GR Research | Speakers, Tube Preamplifiers, Tube Preamplifier Kits |
| Graaf | OTL Tube Amplifiers, Tube Amplifiers |
| Grand Canyon Tube Radio® | Old Radio repair, restore and sell business |
| Granite Audio | Tube Amplifiers, Speaker, Tube CD Players |
| Grayhill, Inc. | Switches, Rotary switches |
| Greatly Blessed Yield | Tube Amplifiers, Tubes |
| GREENSTONE USA | Tubes |
| Greenstone USA | Tubes |
| Greenweld Limited | Tubes, Kits |
| Grommes | Vintage Tube Amplifiers |
| Grommes | Tube Amplifier |
| Groove Tubes | Tubes and Eqipment for Musicians |
| GSTubes, radio tubes, valves | Tubes, Vacuum Tube Sockets, Schematics |
| Guitar Amp Evolution | Information about Tube Guitar amps |
| Guitar Amp Tone and Effects Placement | Amptone |
| Guitar Amplifier Blueprinting | Tube Guitar Amplifiers |
| Guitar Tube AMP Items | Tubes, Capacitors, Resistors, Transformers |
| Guitarage Main Page | Information on building a tube amplifier |
| GuitarAmpTubes.Com | Tubes |
| Guytron | Tube Guitar Amplifiers |
| Guytronix | Tube Guitar Amplifiers, Tube Amplifier Kits |
| Gydotron | DIY Tube Amplifiers |
| Gyraf Audio | Tube Electronics for Professionals |