PowerSupply

Very nice, including the two LEDs :-)

Thanks Peter

Green for 5

orange for 9

Hi Antonio,

Cool! - we have an interesting build difference - I have green (5v after vreg) and another green (5v after protection circuit) :-)

Do you already have comments on audio quality/audible hum?

Greets!

Peter

Not really relevant as I made the first test with computer loudspeakers.

I heard no hum...only the classical SID noise.

I will advice you as I will test with a serious audio setup.

Greets

Antonio

Cool, thanks!

Gotta check my filtering capacitators, i really suspect them, by now...

Greets,

Peter

I used two low RS 2200uF 35 V Nichicon capacitors ( total of 4400 uF )

Thanks, I´ve only got one just ahead of the 78S05 - where have you put the second? In "series" with the first? Is more capacity necessary for larger transformers (3+A on the 9V ~ transformer output?)

How can the irregular 5V supply affect the SID output anyways?

I thought they were (only) 9V powered?

Thanks for your time, sorry for the many questions and have a great weekend!

Peter

SID powers

Vdd 9 / 12 V

Vcc 5 V

anyway the ground is common with core so probably 5 V can influence 9V

The caps are in parallel 2 x 2200uF ( 4400 uF )

usually I use "larger" capacitors for

" large " current power supply so I think that only 2200 uF it is not enough for 3Amps... when you start to need more amperes a little capacitor may cause ripple.

try enhancing capacitors value.

( to reduce RS use two caps instead of one bigger for example : two 2200uF instead of one 4700uF)

Regards

Antonio

Wow, thanks for the help Antonio! Will try that soon!

Have a great weekend and lots of joy with your MB6582 :-)

Best regards,

Peter

You are welcome :smile:

I hope that the hum disappeares

Have a nice weekend you to

Antonio