Nice spec sheet for the BTH K10A. These are very rare. If you want to find these you need to be in the UK or Canada and even then they are very rare..
♪ - こんばんは。 電圧増幅管の１２ＡＴ７／ＥＣＣ８１を交換して 電圧チェック♪ これで ２～３日 試聴します♪♪ ・・・
3 hours 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.