push-pull phono preamplifier
Component tube	Rectifier	MJ issue:
5691/42/801A	83	Jan. 1980
5691/801App/RCA50	83	Aug. 1980
WE-102D/WE-VT52/VT-52pp/PX4	274B	Nov. 1985
12A/12A/801App/801A	83	Nov. 1985
5691pp/WE-205Fpp/WE-205F	83	Oct. 1987
5691pp/RCA841pp/WE-300B	WE-274A	Book 1989
5691pp/NL50pp/845	WE-422A	Jan. 1993
5691/EL156/WE-300B	83	Mar. 2002
NEW5691/5692/WE-VT-52/STC-4300B	GZ37	Aug. 2003

SE phono preamplifier
Component tube	Rectifier	MJ issue:
6ZDH3A/76/76/2A3	5R4GY	Aug. 1977
5691/WE-311A/RCA50	83	Oct. 1978
5691/EL34/KT66	GZ37	Sep. 1979
5691/EL34	83	Oct. 1988
5691/RCA50/RCA50	83	Nov.1991
5691/EL34/EL34	GZ37	Aug. 1992
5691pp/WE-264Cpp/300B	WE-274A	Jan. 1993
6GA4/VV300/VV300/VV300	83	Sep. 1996
5691/845/845	83	Sep. 1997
5691/845/845	5R4	Oct. 1998
5691/6550A/845	5R4	Feb. 1999
5692/CV5112	WE-422	Jan. 2001
5691/EL156	WE-422	May 2001
5691 / 5691 / WE-300B	WE-422A	Sep. 2001

Tone control and buffer amplifier for CD
Component tube	Rectifier	MJ issue:
211	GZ37	July 1993
845/845	5R4	July 2000

PoWE-r amplifier
Combination phono preamp-poWE-r amplifier
Two channel amplifier

Introduction
Index of Sakuma's works