| Beijing Yushang Electronic Audio Technology | Tube Amplifiers |
| Yahoo Group Quad Hifi | Forums |
| Yahoo! Clubs bigvalveamplifiers | Forums |
| Yahoo! Clubs singleendedtriodeamps | Forums |
| Yahoo! Groups singleendedtriodes | Forum |
| Yahoo! Groups tannoy | Speakers |
| Yahoo! Groups hktubeaudio | Forum |
| Yamamoto -JA1JTA Home Page | Ham Radio History |
| Yamamoto Sound Craft Homepage | Japanese Tube Amplifiers and Parts |
| Yama's Enterprises Inc | Retailer |
| Yarland | Tube Amplifiers |
| Ye Olde Valve Radios | Radio Museum |
| Yogoo | Tube Amplifiers |
| Yokohama Electric | Handicraft Museum |
| Yoshiba Onkyo | Japanese Tube Amplifiers and Spaekers |
| Yoshidaen | Japanese Tube Amplifiers and more |
| Your new 300b Triode Amp | A Kevin Kennedy design |
| YS-Audio | Valves Tubes Audo Online Magazine |
| yun wai tian | DIY Tube Amplifiers |
| Yvo's HIFI pictures page | Quad |