Metal base Tung-Sol 6550 tube advert. I had some of these from an old Webster Electric organ amp. Not sure what happened to them might have to start looking.
信／仰 - 有時後，「中頻很美⋯⋯時」，我真的不想再增加超高音頻段。 「人」最重要的是「幫助人」 ！ 牛教練／信仰
4 minutes ago
Just a place to post some of the hi-fi information I have collected over the years. Usually retro somtimes vintage sometimes modern but always hi-fi.