Ayumi's Lab. 00 5 Updated 003 6 3 4 4 8 5 9 6 0 6..................................... 0 6......................................... 00 Professor 4 LP S/N NF CR Rec. out 0 kω Line out 47 kω
3 NF 667- AU7 [, p. 8] AX7-/ AU7 [, p. 39] MJ 00 6 AX7-/ AU7 [4] 667 AX7 AX7 V, V AX7 V3 AU7 6 0.6 V (0.6 V) [4. V] 3.4 V (8.0 V) [3.7 V] R6 80 kω (6) Phono R 47 kω 7 8 R kω R3 0 kω C 0.047 µf 50 V R4 470 kω 3 R5 kω.067 V (.05 V) [.07 V] C 0 µf 6 V (7) 8.9 V (3.0 V) [8.0 V] R7 47 kω (8)3 C3.µF 50 V R0 470 kω to Input selector.043 V (.06 V) [.4 V] R9.6 MΩ R8 00 kω 3. V (.9 V) [. V] C3 47 µf 350 V R 0 kω W B+ (58 V) C5 530 pf 500 V C4 750 pf 500 V : L ch. R ch. SPICE C5 00 pf 330 pf R9.6 MΩ C Marantz 7 0.05 µf 36 db (63 ) Va R NFB R6 80 kω E p0 = 3 V, E g0 =. V, I p0 = 0.49 ma µ = 97, r p = 8 kω, g m = 00 µs A 50 A = 97 34 () 8 + ( + 97) + 50 E p0 = 3 V, E g0 =.07 V, I p0 = 0.54 ma µ = 97, r p = 78 kω, g m = 40 µs khz ( ) 73 4 j kω A 73 4 j A = 97 50.3.7 j () 78 + 73 4 j 3 A A = A A = 34 (50.3.7 j) 70 43 j (3)
Ip (ma) 0 0.5.5 Eg=0V 0.5 0.5 AC load line (50k) 0.75.5.5.75.5.5.75 3 3.5 3.5 DC load line (0k) 0 50 00 50 00 50 300 Ep (V) : khz β β = = 0.00978 + 0.045 j (4) + 84.3 0 j A f A f = A = 4.9 48. j = 64.4 (5) + Aβ Ip (ma) 0 0.5.5 Eg=0V 0.5 0.5 0.75.5 AC load line (83.8k).5.75.5.5.75 3 DC load line (63k) 3.5 3.5 0 50 00 50 00 50 300 Ep (V) 3: E p0 = 04. V, E g0 = 4.6 V, I p0 =.5 ma µ = 6.7, r p =.5 kω, g m = 340 µs 47 kω 3
.4 kω A.4 A = 6.7 = 0.95 (6) ( + 6.7).4 +.5 Z o =.5 //47//470 = 0.695 [kω] (7) + 6.7 4 Ip (ma) 0 4 6 8 0 Eg=0V AC load line (.4k) 4 6 8 0 4 6 8 0 DC load line (47k) 0 50 00 50 00 50 300 Ep (V) 4: 5 6 RIAA R L = 47 kω 58.4 (35.3 db) R L = 0 kω 55.4 (34.9 db) 36 db C3. µf 0 kω 0 Hz 0.5 db 7 RIAA C 3 [4] CR CR 0 db 0 db 40 db CR AU7 SRPP ( kω ) NF Bax VR [] VR 3 ( ) LUX CR 4
Gain (db) 0 0 0 30 40 50 60 RL=0k RL=47k 0 00 k 0k 00k 5: ( ) RIAA difference (db) 3 0 3 RL=47k RL=0k 0 00 k 0k 00k 6: RIAA ( ) RIAA difference (db) 6 4 0 With Decoupling With Decoupling RL=0k RL=47k 0. 0 00 k 7: RIAA ( ) 5
[3] AX7 Web LUX SQ38FD (http://home.highway.ne.jp/teddy/tubes/ana/ana.htm) NF g m µ kω AT7 SRPP AU7 + + 6 Rec. Rec. C7 5600 pf 50 V to Eq. Line Line Source Off 5 4 7 5 4 6 S Rec. Out 9 8 0 8 7 6 4 3 7 8 6 V4, V5 AU7.0 V (0.3 V) [5. V] R 00 kω 6.44 V ( ) [6.5 V] R 4.7 kω 8.8 V (8.5 V) [3.9 V] R3 00 kω 3 C6 0.47µF 50 V R4 00 kω S3 Tone Defeat Bass VR3 500 kωb 3 C8 470 pf 50 V R6 0 kω 3 VR4 500 kωb Treble R5 00 kω (7) V6 AT7 (6).4 V (8)3 (.3 V) [.6 V] R7 80 Ω C9 0 µf 6 V [6.8 V] C0 0.47µF 400 V R8 47 kω Line Out R9 470 kω Play S Input Play VR 00 kωa Volume 3 0 VR 50 kωmn Balance (3) ()3 to Eq. 58.5 V (58.7 V) [58. V] C 47 µf 350 V R 4.7 kω W 87.7 V (87.7 V) [87.5 V] C 47 µf 350 V R0 4.7 kω W B+ (37 V) 8: E p0 = 8.9 V, E g0 = 6.4 V, I p0 =.33 ma µ = 5.5, r p = 7.6 kω, g m = 880 µs 00 kω A 00 A = 5.5 = 7.93 (8) 7.6 + ( + 5.5)4.7 + 00 9 E p0 = 6. V, E g0 = 6.74 V, I p0 =.3 ma µ = 5.4, r p = 7.9 kω, g m = 860 µs 00 kω A 00 A = 5.4 = 0.99 (9) ( + 5.4)00 + 7.9 Z o = 7.9 //00 =.08 [kω] (0) + 5.4 0 6
Ip (ma) 0 3 4 5 Eg=0V 4 6 8 0 4 6 8 DC load line (00k) 0 0 50 00 50 00 50 300 Ep (V) 9: Ip (ma) 0 3 4 5 Eg=0V 4 6 8 0 4 6 8 DC load line (00k) 0 0 50 00 50 00 50 300 Ep (V) 0: Gain (db) 0 5 0 5 0 V4a Plate V4b Cathode 0 00 k 0k 00k M : ( ) 7
E p0 = 59.7 V, E g0 =.6 V, I p0 =.63 ma µ = 55.9, r p = 9.4 kω, g m = 890 µs ( 47 kω ).4 kω A.4 A = 55.9 30 () 9.4 +.4 Ip (ma) 0 4 6 8 Eg=0V 0.5 AC load line (3.5k).5.5 3 3.5 DC load line (47k) 4 4.5 5 5.5 6 6.5 7 0 50 00 50 00 50 300 Ep (V) : 3 0.904 ( 0.875 db) Response (db) 5 0 5 0 5 0 5 0 00 k 0k 00k 3: ( ) 4 B 6X4 8
AC 00 V TANGO ST-30 6.3 V 0.7 A Power 60 V 00V 0 V V7 6X4 6 3 4, 7 L 30H 30mA 34.3 V 37. V C05 47 µf 450 V C06 47 µf 350 V B+ R04 330 kω W 63.6 V R05 8 kω W C07 47 µf 00 V 0V 60 V D RBV40L + 5 V C0 0000 µf 5 V U LM350T 8.8 + 63.6 V IN OUT.5 + 63.6 V C0 ADJ R0.5 µf 00 Ω R03 5 V 47 kω R0.8 kω Q SA05 D N400 C03 µf 5 V C04.5 µf 5 V R06 6.8 kω D3 LED EL33-3B 4 5 4: LM350T (LM37T ). 60 V AU7 00 V 5 Duncan's Amp Pages (http://www.duncanamps.com/) AX7.6 V A Vh (V) 0 4 6 8 0 4 Ih (A) 0.0 0. 0.4 0.6 0.8.0. Constant Voltage Slow Start 0 4 6 8 0 0 4 6 8 0 Time (sec.) Time (sec.) 5: ( ) 5 FU88-30 80 mm (http://www.ocn.ne.jp/ san-ei/) 9
PC Optima Linotype MyFonts.com (http://www.myfonts.com/) $ ( Optima ) ( ) (http://www3.ocn.ne.jp/ aidcraft/) 00 mm 50 mm B 3,300 Web D3 ( ) DALE / W Philips / W W Muse V3 V7 Philips EGC 6 5% 0. V B 6. 6 L ch. R ch. 0 kω (Z in = 00 kω) khz 0. V (.89 mv) 50 Hz khz 0 kω 5.4 (34.4 db) 00 kω 55.6 (34.9 db) RIAA ( 7) 00 kω 0 Hz 0 khz ±0.5 db 8 5 V 70 db 9 0 kω 0.05% 00 kω /0 00 kω 0 700 Ω 800 Ω 0
Gain (db) 0 0 0 30 40 50 60 0 00 k 0k 00k 6: RIAA difference (db) 3 0 3 0 00 k 0k 00k RIAA difference (Hz) 7: RIAA Crosstalk (db) 00 90 80 70 60 0 00 k 0k 00k 8:
Vo (V), Distortion (%) 0.0 0. 0 50 00Hz khz 0kHz khz, ZL=00kohm 0.00 0.0 0. Vi (V) 9: Zo (ohm) 500 k 5k 0 00 k 0k 00k M 0: 6. Tone defeat V 6.3 Hz 40 khz Response (db) 0 5 0 5 0 5 0 00 k 0k 00k 00k : (Tone defeat)
5 V Crosstalk (db) 00 80 60 40 0 R to L L to R 0 00 k 0k 00k : 3 khz 0 kω 5.5 (4.8 db) 00 kω 5.88 (5.4 db) R ch. L ch. 0. db Vo (V), Distortion (%) 0.0 0. 0 0 khz khz, ZL=00kohm 0. 5 Vi (V) 3: 4 Lux NFB 3
870 Ω Zo (ohm) 500 k 5k 0 00 k 0k 00k M 4: 5 ±3 db Response (db) 5 0 5 0 5 0 5 0 00 k 0k 00k 5: L ch. R ch. ( ) 0.0 mv 0.8 mv (A ) 0.03 mv 0.035 mv ( ) 0. mv 0.4 mv (A ) 0.00 mv 0.08 mv 00 mv, V S/N 75 db, 94 db [],,.., 000. [].., 000. [3]..,, 999. [4]. MJ., June 00. 4