지금 서재에서 듣고 있는 KT88 진공관 Amp.
원래의 Amp는 아래 보이는 이것이었다. 6BQ5 SE amp.
음질의 개선을 위해서 Output Transformer를 좋은 것 (비싼 것?)으로 바꾸었다.
(마침 남은 것이 있어서)
그래서 이런 모양이 되었다.
진공관은 변홤없이 6BQ5
그런데
음질 개선이 기대에 못 미쳤다.
좋은 Output Trans에 걸 맞는 출력 진공관이어야 한다는 뜻.
그래서 기본적인 회로도에는 큰 변화가 없이 KT88 SE Amp로 바꾸었다.
출력 진공관을 KT88로 바꾸고 그 외 다른 부품(저항) 수치를 조정했다.
음질 만족.
그렇게 해 놓고 듣다 보니 이 음칠 좋은 Amp의 모양이 뭐 이런가?
하는 변덕스런 생각.
사실을 얼마 동안 Amp를 만들지 않고 있다 보니
마음속에 충동이 일어났다고 보는 것이 맞다.
그 동안 묵혀 두고 쓰지 않던 Chassis가 있었다.
그래서
“KT88 SE(Single Ended) Stereo Amp. (제작: 이론과 실체)“ 를
쓰는 김에 이것을 뜯어서 처음부터 설명하는 것이 좋겠다고 생각.
거기에 부품을 mounting 할 구멍을 뚫고.
이거 아주 귀찮은 일이다.
앞면 옆면을 장식할 나무를 잘라 만들고
앞면을 고급스럽게 흑단(ebony)로 만들다.
Sanding 하고
Stein 하고…
그런데 왜 이렇게 힘이 드는지 모르겠다.
몸이 의욕을 못 따라간다.
이 부분이 제일 힘이 들었다. 힘이 딸려서.
드디어 부품을 mounting 했다.
모양 좋으라고 앞면에 Level meter를 사서 붙임.
중국제 싼 것을 샀지만 그래도 여기에 비용이 들어갔다.
이제 wiring(배선)만 남았다.
(앞면)
(뒷면)
마음에 쏘옥 든다.
이것을 배선(wiring)해야 한다.
또 다른 문제
내가 생각해도 나는 변덕스럽다.
멀쩡한 것을 뜯었다 붙였다.
있는 것을 뜯어서 이리 저리 옮긴 것이니 비용은 별로 안 들었다.
가난한 나의 취미 생활.
흑단으로 만든 고급 앞면이 품위를 더한다.
어떤 Amp도 없는 고급 흑단 앞면.
참 좋다.
외관도 참 중요하다.
PCB(Printed Circuit Board)를 만들었습니다.
사실은 PCB가 아니고 Universal Board에 회로대로 부품을 땜질 한 것입니다.
이제 배선을 하면 됩니다.
그런데 왜 이리 힘이들까?
날도 매우 덥고.
아직도 이런 것을 할 수있게 머리가 돌아가는 것을 감사해야 할 듯.
(완성할 때 까지 계속 씁니다)
드디어 완성. 이제는 들으면서 음질 조정 단계
배선을 끝내다.
날씨도 덥고, 너무 빨리 끝내면 은퇴한 늙은이가 심심해서…
천천히 세월가 가거라 하면서 작업
아 – 마음에 쏙 든다.
만드는 즐거움.
음악 듣는 기쁨.
깨끗한 음질.
“하나님 보시기에 좋았더라“ 하는 말씀을 아주 조금 이해하는 순간
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