5687 12AU7 共用ミニ シングルアンプ

1 5687 12AU7 Tube Audio Lab. 5687 5687 IC 400 2000( ) 1970 1980 12BH7 6FQ7 12AX7, 12at7 , 12AU7 9 MT (T6-1/2) MT SP 1950 ( ( ))

2 UX12 App UY76pp , 5687 1/2- 12at7 - 12at7 - 5687pp 3W 10 dB NF 10Hz 100kHz AB1 PX4s 3W Tannoy GRF Memory 28 V1 12AT7V35687FW-751V1,V2 HeaterV46X4V3 Heater500k B20 F50k 500k F500k 50k 250k AC40 F420 260v10k V212AT756k 1k 2M 15k 50k 50k 5k B60v13v2k 2k 250vAC Fig,1 ( ) Ip UX-71A 5687 Hi-Gm 5687 UX-71A Table 1a 5687 Table 1b 71A 5687 Hi-Gm Ec 5687 NF MT 5687pp A Altec 5670

3 FW751 10W 20k 8 2 2000 1 1,000 CT B KT88 KT88 Ip 60mA 5687 20mA 5W 10W B 3mm

4 Shimoda 1500 ( 540) 240mmx120mm 40mm Photo 1 5687 PP Amp 5670 5687pp 26Z5W MT 5687 26Z5W 100mA

5 A PP 5687 PP 40mm 2 120x240 150x250 PP B CT 5k 5 7k 20k 20k 17k ( ) 1/2- 12AU7 Eb 250v Ip 10mA Eg rp Rp 17k Pout SP SW Fig 2 PP.

6 Frank 5687 12AU7 Table 2 ( Frank s electron tube data sheets) 6BM8 6S4 6BQ5 5687 5687 mini 12at7 5670 35 12at7 5687 5687 MT WE 2C51 WE AB1 1w

7 WE 5670 5670 1000 PP 80mA 26Z5W 6X4 5687 Photo 2 Table 3 Fig 3 6AL5 9mA 18mA 20mA 40mA 9mA 5687 s 40mA 6AL5 5 6X4 A 5670 5687 6X4 3 150x250 MT 5687 12AU7 (5814)

8 SW SW SW Fig 4 5687 12AU7 6X4 1 20k CT 2 8 1 KT88 BGM 2

9 L Photo 4 5687 Photo 5 12AU7 (5814) 5687 12AU7 SP Photo 6 Photo 7 6X4 PYRAMID 30 30 400WV 0 400 VDC 200mA 3k 10W 250 370V Mallory Sprague