Transatlantic_bassman 电路图 维修原理图.pdf

5 5 4 4 3 3 2 2 1 1 DD CC BB AA DRAWN BY: JOHN KELLEY BROWN 366 v 201 v 40 v 413 v 120 volts AC Black Green White 312 vac 357 v 192 v 336 v 212 v BASS INSTRUMENT NORMAL 410 v 242 v 234 v 1. ALL ELECTROLYTIC CAPACITORS ARE MALLORY TC SERIES, (EXCEPT THE ONE ELNA). 2. ALL RESISTORS ARE NON-INDUCTIVE, SIGNAL CAPS PAPER-IN-OIL. Elna Cerafine TC69 TC77 TC75 TC69 3. ALL POTENTIOMETERS ARE 2 WATT AND ARE EITHER CLAROSTAT OR PE. 413 v TC77 With Bright switch on, SW1a is open and SW1b is closed. BRIGHT SWITCH high = open low = closed UNLESS OTHERWISE SPECIFIED 1.8 v 1.64 v 401 v 401 v -36 v 46 vac 312 vac 189 v 346 v TC77 346 v 188 v TC79 298 v 2.9 v 1.3 v 1.36 v42 v 361 v NORMAL DEEP SWITCH With Deep switch on, both SW2a and SW2b are closed. 52 vac January 25, 2002 There wasnt room otherwise I would have used the Mallory TC69s in a configuration like C1, C2, R1 and R2. This amplifier is built into a Fender Bassman head, there was no room for things like Mid knobs, Boost knobs etc. An enhanced version of this schematic will be created soon that will include these things as well as footswitching channel and boost selection. It will simply be the Transatlantic. Note the actual HT voltages on the secondary of the Hammond 372-JX, the Hammond spec say 300-0-300. All voltage readings were taken with the AC from the wall accurately set to 120v with a variac. Of the choices of EL34s available today, I prefer the Electro Harmonix, though Im sure NOS Mullards would be much better. B 03-0001-01 11 TRANSATLANTIC BASSMAN X3 Title SizeDocument NumberRev Date:Sheetof 3.53 a 3.53 b 3.53 b3.53 a 3.53 a 3.53 b 3.53 a 3.53 a 3.53 a 3.53 b 3.53 b 3.53 b 3.53 a 3.53 b C6 30uF 450v V6 EL34 8 2 7 5 4 1 3 VOLUME NORMAL 1M Audio C38 47uF 100v BIAS 50K, 2 watt locking Clarostat V5 EL34 8 2 7 5 4 1 3 PRESENCE 5K Linear 2 C1 100uF 350v V4a 12AX7 SWITCH, MAINS Carling 110-63 LP1 LAMP D7 1N4007 C7 470uF SWITCH, STANDBY Carling 110-63 C25 20uF 450v C16 4.7uF V1a 12AX7 BASS 250K Linear C23 33uF V4b 12AX7 FUSE HOLDER, SECONDARY 1/2 AMP SLO-BLO D1 1N4007 T1 Hammond 372-JX White / Black White Red Red Yellow Green Yellow Green Green / Yellow Red / Yellow Yellow / Black Violet Black / Red Black Brown Brown / Yellow Blue / Yellow Blue D4 1N4007 FUSE HOLDER, PRIMARY 3 AMP AC CORD TREBLE 250K Linear VOLUME BASS INST. 1M Audio SW1a SW2b C39 47uF 100v Red Black IMPEDANCE SELECTOR 16 4 8 SPEAKER EXT. SPEAKER C2 100uF 350v Hammond 193C 20 Henry 2 1 BIAS SELECT C3 47uF 500v C4 30uF 450v VISCOSITY D2 1N4007 D3 1N4007 D5 1N4007 D6 1N4007 SW1b V1b 12AX7 R6 7.8K 5W R32 10K R33 1M R34 1M R35 470 R38 82K R39 100K R40 220K R41 220K R4 4.7K 5W R47 2.2K 5W R36 47K R50 15K R8 56K R14 470K R37 150K R42 4.7K R43 4.7K R11 120K R12 178K R13 150K R10 1.2K R44 1 OHM 1% R45 1 OHM 1% R7 1M R30 470K R12 56K R26 68K R29 6K 5W R23 178K R27 2.2K R28 220K R24 100K R22 2.2K R49 10K R25 6.8K R9 27K R48 7.5 OHM R51 47K R1 220K R2 220K R46 2.2K 5W R21 1M C28 .1uF C31 .12uF C9 .022uF C11 560pF C10 680pF C30 .12uF C26 .1uF C29 47pF C8 .68uF C18 330pF C19 .1uF C20 .047uF C24 .0047uF C21 .0047uF C22 47pF C17 470pF C32 .01uF C35 .01uF C33 .01uF C34 .01uF C36 .01uFC37 .01uF C27 .022uF R15 1K V3a 12AX7 C5 30uF 450v R18 33K C12 3.3uF V2b 12AX7 V3b 12AX7 C13 560pF R31 470K R19 17K BASS 1M Audio TREBLE 250K Linear C14 .022uF R20 9.1K R17 100K R16 120K C15 .022uF R5 4.7K 5W 1 R56 1M R55 56K V2a 12AX7 R57 6.8K C43 .68uF R59 180K R60 820K R54 120K R53 22K C41 .01uF R58 470K C42 500pF R52 10K 5W C40 50uF 450v C44 33uF R61 27K SW2a T2 Obsolete Electronics Plexi Output Transformer brown green blue orange red white yellow 收音机爱好者资料库 Ra d i o Fa n s .CN