PI Audio

[Mdtoday]

hi dom44.
I did this circuit. but the sound is weak

Hi sbalio1,

Did you build from dom44's pcb design or from my original post at beginning of thread which is closest to Mickstv design, same opamps ...?

How did you test the unit? is connected to speaker or headphones etc?

cheers

Mdtoday

[Natee tong]

Hi dom44

Is there a video clip to listen to audio?

[sbalio1]

hi mdtoday.
I made the last file, the sound is weak. with a loudspeaker. I added a 10 uf capacitor between pins 1 and 8 of lm356 .the sound and loud now

[Mdtoday]

hi mdtoday.
I made the last file, the sound is weak. with a loudspeaker. I added a 10uf capacitor between pins 1 and 8 of lm356 .the sound and loud now

Yes, that is required for gain, glad you got it working.

Dom44, i think you will need to add that cap to your PCB artwork...

[sbalio1]

...

https://www.youtube.com/watch?v=IZNaDAVcvjI&feature=share

[TufaN]

Hello friends
can this vco circuit be applied to delta plus?

[sbalio1]

Yes can be used

[liekwang]

hi mister I want to ask, is there anyone who uses mick audio for scematic dooley TD3X seems interesting

[Bayu]

Master please this vco make transistor, pnp and GSD what number series??? Please help,

[perzo]

Master please this vco make transistor, pnp and GSD what number series??? Please help,

Pn4393

[Mdtoday]

Master please this vco make transistor, pnp and GSD what number series??? Please help,

JFET PMBF4393 or equivalent

cheers

Mdtoday

[Bayu]

And transistor pnp make series?? Thanks mdtoday

[Bayu]

Thanks!!

[Mdtoday]

And transistor pnp make series?? Thanks mdtoday

The PNP transistor is a BC857C or equivalent.

cheers

[Bayu]

Mdtoday terimakasih
Thanks