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Re: Pocket Tutor

 

Hi Ken,

Yes, those should work.??

The pot you specify is exactly what I am using, fits nicely, and feels right.? No knob needed.

The knurled encoder shaft feels a bit rough to me.??
Also, make sure the shaft length on the encoder is correct.? I noticed that the pot shaft and encoder shaft are measured differently.
Since the encoder shafts are aluminum I cut mine to size with a dremel.

Part 6 will include a bill of materials and links for the major components.

Bruce
??

On Wed, Jul 8, 2020 at 3:19 PM Ken Kaplan <wb2art@...> wrote:
Hi Bruce
I was thinking of using a knurled shaft for the audio pot and encoder.
Maybe something like these:
audio pot: PTV09A-4020U-B103
encoder: PEC11R-4215K-S0024
(Digikey)
I'm just trying to find a way to eliminate the hunt for knobs.

73
Ken WB2ART

On Wed, Jul 8, 2020 at 2:48 PM Ken Kaplan via
<wb2art=[email protected]> wrote:
>
> Hi Bruce
> Nice and simple.
>
> I do have a problem with the PAM8403 chips on the previous versions.
> They are very noisy when using headphones.
> Have not found a cure.
>
> I will probably sell the 5 'old' versions, as I like the idea of
> battery operations.
> We charge enough 'stuff' around here, so one more won't be a problem.
> 73
> Ken WB2ART
>
>
> On Wed, Jul 8, 2020 at 2:36 PM Bruce Hall <bhall66@...> wrote:
> >
> > I posted a draft of part 4 (audio):
> >
> >
> > - Bruce
> >
> >
>
>
>
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