Magnatone_M2 电路图 维修原理图.pdf

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1、收音机爱好者资料库 Ra d i o Fa n s .CN Magnatone Custom M-2 Schematic redrawn by Steve Luckey on March 18, 2015 A .047 150/2W 270K .047 270K 100K SPEAKER (8 OHMS) 1 8 7 6 3 7 8 6 3 V4-A V3-B V4-B B 100K 9 2 9 1 2 V3-A 270K 2.7K .0047 1M 2.7K 25 V3, V4 ECL86/6GW8 CC .001 100K 6.3 VAC 202020 1K8.2K A 338 VDC B

2、 328 VDC C 288 VDC 250 VAC 250 VAC D 256 VDC 0.1 47K 6 7 8 270K 3.3M .01.01 .02 .02 820K 500k Speed 220K V1A 12AX7 1M Intensity Footswitch .02 B VIBTREM 3 2 1 4.7K 270K V1B 12AX7 D 1M 47K .047 .01 Volume 1M-A Tone 1M-A 3 2 1 5.6K 220K D .0022 8 7 6 22K 18K D .001 10M 1.5M 1M .022 180K .02 470K V2 12

3、AU7 47K 220K 180p 47K .0047 1M 1M 220K DPDT This mod adds bias variable tremolo. The circuit is true to the M2 schematic when VIB mode is selected. Hammond AO-24158-0 100 * 2.2uF * 2.2uF * Added bypass caps to increase bass Changed to 100 to increase vibrato strength 40F Changed to 40F to eliminate

4、motorboating at high volume levels 8.2K 162 1.6 86 4.354 203 256256256 288288 1.4 60 58.5 Added 1M resistor to input jack Changed to 8.2K to increase node D voltage NOTE. Component changes shown on this schematic may not appear on other drawings Line voltage is 120 VAC 2 1 3 2 AMP SLO BLO POWER LINE

5、NEUTRAL GROUND 333 333 12.2 328 338 470/3W 146226 DC voltages for this triode will be varying at the LFO frequency 收音机爱好者资料库 Ra d i o Fa n s .CN 2 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 Hammond AO-24158-0 1 1/4 1 1/4 2010 Chassis = 12 x 6” x 2” FUSE 1 2 3 N L G 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 DDC 1

6、80p NFB C Drawn by Steve Luckey on 03/04/2015 T S G Input Tone 1M-A Volume 1M-A .01uF Speed 500K Intensity 1M-A VIB T S G TREM Footswitch D B 0.0047F 0.047F + + 25F + + 22F 450V BA V1 12AX7 2222 3/4 V2 12AU7V3 6GW8V4 6GW8 0.022F 0.022F VAR2 0.022F 0.0047F 0.1F 0.047F 0.01F 0.01F 0.022F 0.0022uF 0.00

7、1uF VAR1 0.001uF 0.047F 0.022F Filaments 1N4007 1N4007 *NOTE* Filament CT is internally connected to HT CT 收音机爱好者资料库 Ra d i o Fa n s .CN 2 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 Hammond AO-24158-0 1 1/4 1 1/4 2010 Chassis is 12 ” x 6 ” x 2 ” 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 8 BA 222 3 1/4 Filaments

8、*NOTE* Filament CT is internally connected to HT CT 1 1/41 1/41 1/41 1/41 1/41 1/41 1/41 1/41 1/41 1/4 Board is 8” x 3.125 1-1/2 VOLUMETONESPEEDINTENSITYVIBRATOFOOTSWITCHINSTRUMENTPOWER 1 1/41 1/41 1/41 1/41 1/41 1/41 1/41 1/41 1/41 1/4 MAGNATONE M-2 TREMOLO 6 8 10 0 2 46 8 10 0 2 46 8 10 0 2 4 VOLU

9、METONESPEEDINTENSITYVIBRATOFOOTSWITCHINSTRUMENTPOWER MAGNATONE M-2 6 8 10 0 2 4 TREMOLO INSTRUCTIONS FOR PRINTING DRILL GUIDE Board size is 3 1/8 X 8. Print 2 copies of this drill guide FULL SIZE on letter sized paper. Use one template as a drill guide. The other template will be used for installing

10、 jumpers. Measure the board length of the printout to verify it is 8. Attach to blank board using double sided carpet tape. Use a center punch to put a mark at the cross hairs of each turret, standoff, and hole. Use a 3/32 drill bit to drill all holes. Then enlarge holes as needed for screws and wire pass thru. Turret - drill size is 3/32 Hole for wire pass thru drill size to fit Standoff drill size to fit Dashed lines are underboard jumpers 8 3 1/8 85 turrets