Hawkeye 58 Posted September 7, 2011 Report Share Very nice, including the two LEDs :-) Quote Link to comment
Antix 8 Posted September 7, 2011 Report Share Thanks Peter Green for 5 orange for 9 Quote Link to comment
Hawkeye 58 Posted September 8, 2011 Report Share 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 Quote Link to comment
Antix 8 Posted September 8, 2011 Report Share 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 Quote Link to comment
Hawkeye 58 Posted September 8, 2011 Report Share Cool, thanks! Gotta check my filtering capacitators, i really suspect them, by now... Greets, Peter Quote Link to comment
Antix 8 Posted September 8, 2011 Report Share I used two low RS 2200uF 35 V Nichicon capacitors ( total of 4400 uF ) Quote Link to comment
Hawkeye 58 Posted September 9, 2011 Report Share 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 Quote Link to comment
Antix 8 Posted September 9, 2011 Report Share 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 Quote Link to comment
Hawkeye 58 Posted September 9, 2011 Report Share Wow, thanks for the help Antonio! Will try that soon! Have a great weekend and lots of joy with your MB6582 :-) Best regards, Peter Quote Link to comment
Antix 8 Posted September 9, 2011 Report Share You are welcome :smile: I hope that the hum disappeares Have a nice weekend you to Antonio Quote Link to comment
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