Mic, Line, EQ... Preamps

[apexaudio]

Is this correct now??

Regards

It's correct,
Regards

 

[zeraphine]

hello Mr. Miles, I cant seem to find the schematic or the PCB layout of the APEX BJT Preamp QQ12e5k1 talking about, care to share it here, thanks!!

 

[QQ12e5k1]

PSU for preamps and active x-overs, with different zener output voltage can be +/-12V, +/-18V...

Any substitution for BF245 Sir??

Regards

 

[vorezky04]

It's correct,
Regards

Mr. Mile, can you mirror your layout ML3???
Because I make layout PCB with metode iron..

 

[apexaudio]

Any substitution for BF245 Sir??

Regards

Use 2SK246, 2SK49...

 

[rifky]

all of tone control of you, mr. mile
what is favorite your tone control?

i make ultimate AX14. witch one compatible is it??

 

[RSK]

GUITAR AMP

Hello Mile,
Been waiting for so long.
Can You Help Me On Your Guitar Amp???

RAJ

 

[apexaudio]

Hello Mile,
Been waiting for so long.
Can You Help Me On Your Guitar Amp???

RAJ

Yes, but you must do some measurement, and voltages in some points can help...

 

[apexaudio]

all of tone control of you, mr. mile
what is favorite your tone control?

i make ultimate AX14. witch one compatible is it??

From post #209

 

[RSK]

Yes, but you must do some measurement, and voltages in some points can help...

The amp is working. I connect a 10K pot input at C14. But the amp is not powerfull. Please tell me what to change for the gain.
And also please tell me how to include clipping indicator.

The preamp I do not want to use yet. I do not want to trouble you further.

Thank you

 

[rifky]

From post #209

i make it, but i feel bass was less. why???

 

[vorezky04]

Mr, canou design layout BJT preamp with stereo input and output???

 

[viki_v2]

Is this correct now??

Regards

hello,
Your attached file does not open , can you repost the file.
Thank you.

 

[harp mg]

help me with this ML3

ML3 Schematic

Hi man i know its a bit late to quote this but ml3 that i have made is generating some noise when the vol is open.
espesialy it gets worse when i connect the mic to it.
what coul be the problem.
u know when mics coil is connected the noise is loud and when its not connected the noise is lower but suffering again. what to do man????

 

[wattaniya]

hi apex sir .
is this correct method for the tone control?
can i use 20k stereo controls, pls share if u have the pcb layout in pdf format
thanks.

 

[jash2008]

This simple x-over work in range 20-100Hz, if you need this low pass instead 80-250Hz you can just use pot 2x50k instead 2x10k and sound will be same.
Regards

hello apex,

I want to redesign your "APEX sub Mon" into SMD version, will it be possible for you to post its schematic. this x-over really sounds great.

thanks

 

[sasek]

X-over frequenies are from 80Hz to 250Hz,
Regards

what component should be change to x over frequencies are from 20hz or below?

 

[vorezky04]

Mr Mile, can you post your preamp???

 

[shreya]

Sir

i want this psu for 35-0-35 5A transformer

what changes have to be made on this

 

[radio]

Subwoofer X-over with inputs from line or speakers.

Hi Mile!
If you are able to shematic (circuit) the pattern of low-bandwidth filter (Subwoofer X-over).
thanks