Audio valves by Shuguang "Treasure Series"                       

                               300B=Z                                                                                                              2A3=Z

                  

                                         6CA7=Z                                                                                                  CV181=Z

KT88=Z

UK Prices link

Review link==https://www.6moons.com/audioreviews/shuguang/treasureseries.html

        Review Link==   https://www.enjoythemusic.com/magazine/equipment/0509/shuguang_treasure_series_6CA7_kt88.htm

    Review Link==   https://www.tnt-audio.com/accessories/shuguang_treasures_el34_kt66_e.html

    Review Link==     https://www.dagogo.com/View-Article.asp?hArticle=858

     Info Link ==            https://grantfidelity.com/factories/?page_id=48

https://www.enjoythemusic.com/china_2009/opera_consonance_audio/