Marshall_1968_JTM_45_Service_Data 电路图 维修手册.pdf

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1、Voodoo Amps Marshall 1968 JTM-45 Serial #: 12354 VOLTAGE READINGS: Pin#1 Pin#2 Pin#3 Pin#4 Pin#5 Pin#6 Pin#7 Pin#8 Pin#9 ECC83/12AX7 V1 194 - 1.4 H H 193 - 1.4 - ECC83/12AX7 V2 300 - 1.08 H H 300 168 169 - ECC83/12AX7 V3 231 - 42 H H 227 - 42 - EL34/6CA7 V4 - H 490 486 -43 NP H - - EL34/6CA7 V5 - H

2、490 486 -43 NP H - - EL34/6CA7 V6 - H 490 486 -43 NP H - - EL34/6CA7 V7 - H 490 486 -43 NP H - - TECH NOTES: - All Pico-farad caps are ceramic (no micas at all) - All Coupling-caps were the typical Mustard caps - Coupling-caps for V1 & V2 were rated at 400V while all others were rated at 600V - Both

3、 of V1s cathodes were shared (not split) - Mix resistor on treble channel was bypassed with a 560pF cap (labeled 560pF not 470pF) - V2As cathode was not bypassed - No bright cap on Treble channels volume pot (may have been removed hard to tell) - Slope resistor was 56K & Treble cap was 220pF - Feedback resistor is 47K & connected to the 8-ohm tap. RadioFans.CN 收音机爱 好者资料库