takin'bout guitar amp schematics

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OVER DRIVE 1st

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The overdrive channel step it is 1st.
You can see the device in the boost circuit and the bright switch circuit. Cathode bias resistance of the first level is value of the small awakening, but details are unclear.
Fc of HPF being set by raising well enough, it is warped and it is found that excessive bass is dropped forward the circuit.
The circuit where 500k and 470p are made parallel being Marshall of the sixties is the high pass emphasis circuit which is seen carefully.

R16 820 Cathode bias resistance. When we assume that it is 820Ω truly, rather low electric current may flow well enough. It probably is to be possible to be this truly?

R17 100k Plate load resistance

R18 500k Forming HPF combining with C18 and R19. It emphasizes high. Being Marshall the circuit which is seen carefully

R19 500k Forming HPF combining with C18 and R18

R20 100k Being entwined with R18, and the like it has been attenuated the signal. Attenuation factor at the time of boost OFF is decided. It is low with limits gain - 17dB

VR6 500k Gain knob

VR7 500k Gain knob. 2 systems it has Gain and master, it is possible to change,

C14 4700p Condenser for connection. Value Fc=140 of small awakening - 200Hz

C15 0.68u Cathode bias resistant by-pass capacitor. Value of small awakening. About Fc=160Hz

C16 4700p The condenser which performs the function of the bright switch. Well enough large texture. The expectation whose effectiveness is good rather. When crunching, when it TURNS ON, whether feeling it is good, (lack of confirmation)

C17 470p Condenser for bright switch

C18 470p Forming HPF combining with R18. It emphasizes above 1kHz. Being the Marshall amplifier you see carefully

C20 1000p The condenser in order to adjust high resister at the time of boost OFF

SW4 * When using the overdrive channel, MUTE it does

SW5 * The transfer in channel switch in order to set the bright switch every channel

SW6 * Bright switch. 2 types it can choose. Perhaps, it is possible to also OFF.

SW7 * Bright switch. 2 types it can choose. Perhaps, it is possible to also OFF.

SW8 * Transfer in channel switch. Gain can be set every channel

SW9 * Switch of [purekishimodo]. When it makes [purekishimodo], the amplifier being passed, 2 steps the Marshall of the sixties circuit it becomes entirely

SW10 * Boost switch. Low when [zatsukuri] it calculates with limits gain, with boost OFF - with 17dB and boost ON - it becomes 6dB. 11dB of finite difference boost quantity

R16	820	Cathode bias resistance. When we assume that it is 820Ω truly, rather low electric current may flow well enough. It probably is to be possible to be this truly?
R17	100k	Plate load resistance
R18	500k	Forming HPF combining with C18 and R19. It emphasizes high. Being Marshall the circuit which is seen carefully
R19	500k	Forming HPF combining with C18 and R18
R20	100k	Being entwined with R18, and the like it has been attenuated the signal. Attenuation factor at the time of boost OFF is decided. It is low with limits gain - 17dB
VR6	500k	Gain knob
VR7	500k	Gain knob. 2 systems it has Gain and master, it is possible to change,
C14	4700p	Condenser for connection. Value Fc=140 of small awakening - 200Hz
C15	0.68u	Cathode bias resistant by-pass capacitor. Value of small awakening. About Fc=160Hz
C16	4700p	The condenser which performs the function of the bright switch. Well enough large texture. The expectation whose effectiveness is good rather. When crunching, when it TURNS ON, whether feeling it is good, (lack of confirmation)
C17	470p	Condenser for bright switch
C18	470p	Forming HPF combining with R18. It emphasizes above 1kHz. Being the Marshall amplifier you see carefully
C20	1000p	The condenser in order to adjust high resister at the time of boost OFF
SW4	*	When using the overdrive channel, MUTE it does
SW5	*	The transfer in channel switch in order to set the bright switch every channel
SW6	*	Bright switch. 2 types it can choose. Perhaps, it is possible to also OFF.
SW7	*	Bright switch. 2 types it can choose. Perhaps, it is possible to also OFF.
SW8	*	Transfer in channel switch. Gain can be set every channel
SW9	*	Switch of [purekishimodo]. When it makes [purekishimodo], the amplifier being passed, 2 steps the Marshall of the sixties circuit it becomes entirely
SW10	*	Boost switch. Low when [zatsukuri] it calculates with limits gain, with boost OFF - with 17dB and boost ON - it becomes 6dB. 11dB of finite difference boost quantity