Mic, Line, EQ... Preamps

[DAMANHURI]

APEX TUBE preamp files for pcb done by viktor1986,thanks Mile and thanks Viktor! 🙂

have you tried it? for how many volts and amperes transformer is needed?

 

[ravpreet420]

ML3

hi apexaudio

i wanted more frequency control adjustments
can i add more ic circuit module(like picture) for another frequency adjustment ?
i am wanted to add 3 more frequency controls(total 6 control) .
please help to modify ml3 circuit.
thanks & regard

 

[apexaudio]

hi apexaudio

i wanted more frequency control adjustments
can i add more ic circuit module(like picture) for another frequency adjustment ?
i am wanted to add 3 more frequency controls(total 6 control) .
please help to modify ml3 circuit.
thanks & regard

For more frequency controls use some equaliser circuit.

 

[44250]

have you tried it? for how many volts and amperes transformer is needed?

Preamp for Tube/Mosfet amp

Part list:
R1,R2-12k 2W
R3,R4-220R
R5,R6-680R
R7,R8-100R
R9,R10,R13-1M
R11,R12-3M9
R14,R15-10k
R16,R17-1k
R18,R19-10R
R20-680k
R21-470R

C1,C2,C3,C4-1uF400V MKP
C5,C6,C8-22uF/350V
C7-47uF/16V
C9,C10,C11,C12-47uF/350V
C13,C14-1000uF/16V
C15-47nF/100V MKS
C16-220nF/150V MKS
C17-100nF/63V MKS

D1,D2-ZF10V
D3,D4,D5-1N4148
D6,D7,D8,D9,D10,D11,D12,D13,D14-1N4007

V1-ECC88

Q1,Q2-BC546
Q3-IRF830

IC1-NE555
IC2-7805

LD1-RED
LD2-GREEN

RE1-5V2X1A

AC1-120VAC 100mA
AC2-9VAC 1A

i haven´t built it yet,but viktor has heard some nice impressions.

 

[DAMANHURI]

Preamp for Tube/Mosfet amp

Part list:
R1,R2-12k 2W
R3,R4-220R
R5,R6-680R
R7,R8-100R
R9,R10,R13-1M
R11,R12-3M9
R14,R15-10k
R16,R17-1k
R18,R19-10R
R20-680k
R21-470R

C1,C2,C3,C4-1uF400V MKP
C5,C6,C8-22uF/350V
C7-47uF/16V
C9,C10,C11,C12-47uF/350V
C13,C14-1000uF/16V
C15-47nF/100V MKS
C16-220nF/150V MKS
C17-100nF/63V MKS

D1,D2-ZF10V
D3,D4,D5-1N4148
D6,D7,D8,D9,D10,D11,D12,D13,D14-1N4007

V1-ECC88

Q1,Q2-BC546
Q3-IRF830

IC1-NE555
IC2-7805

LD1-RED
LD2-GREEN

RE1-5V2X1A

AC1-120VAC 100mA
AC2-9VAC 1A

i haven´t built it yet,but viktor has heard some nice impressions.

okay, thanks, I'd love to build a tube preamp, I try to build it slowly.

 

[auto pilot]

I've tried this scheme but I meempunyai constraint when potensio volume, trabel, bass, midel buzzing!!!!! why like that?
but I think there is a problem in the quality of electric power, yesterday flows +15 is correct. I gave ground and -15 only if that is the case or else

 

[ravpreet420]

For more frequency controls use some equaliser circuit.

hello apexaudio
plz upload equalizer circuit ?

 

[ChingTan]

my ml3 and xl2 is on the way... thanks to mile..

 

[44250]

my ml3 and xl2 is on the way... thanks to mile..

...for H900? 🙂

 

[ChingTan]

...for H900? 🙂

yes.. and i would like to ask apex if it is good for h900

 

[ChingTan]

i finish my ml3 and xl2 it sound so good.. great bass mid and treble i can adjust without affecting its other

 

[apexaudio]

i finish my ml3 and xl2 it sound so good.. great bass mid and treble i can adjust without affecting its other

Nice work,
Regards

 

[auto pilot]

i finish my ml3 and xl2 it sound so good.. great bass mid and treble i can adjust without affecting its other

how to compose a master.......???

 

[mebexno]

i finish my ml3 and xl2 it sound so good.. great bass mid and treble i can adjust without affecting its other

sir, 2x ml3 input mono + 2x xl2 input stereo, sorry if i wrong. how the wiring system from your project ?. thank before

 

[engel dela pena]

sir mile,
hope you share 3-way x-over this time with variable freq. range

 

[engel dela pena]

hello mile,
how to make master mixer,let say if i make 5 or mor ml3 how can i make master mixer

 

[apexaudio]

hello mile,
how to make master mixer,let say if i make 5 or mor ml3 how can i make master mixer

MX1 schematic in post #30

 

[csom]

Hi Apex, this is a great thread indeed.

I have been reading since your first post but I am unable to find a stereo 3 band equalizer module on a single pcb using dual potentiometer. ( I might have missed that, I am afraid).

Could you please kindly post a 3 band equalizer circuit and a compact single PCB Layout specially meant for Hi-Fi home stereo ( using NE5532 or TLO72, dual power supply, dual potentiometers( 100K or 47 K) , etc)?

Please consider this earnest request.

Thank you so much for this awesome thread.

 

[engel dela pena]

MX1 schematic in post #30

thank you sir mile,
is it possible to make this 4k7 as gain?

 

[SERGIODS]

i finish my ml3 and xl2 it sound so good.. great bass mid and treble i can adjust without affecting its other

mantaje nice, congratulations mate.

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