video1.0VT-300B (274B、300BTII、6SN7)CRC DIYhttps://odysee.com/@CRC-AUDIO:dOdyseehttps://odysee.comhttps://thumbnails.odycdn.com/card/s:1280:720/quality:85/plain/https://thumbnails.lbry.com/htIg-upHzD8390220560315