Hi!Welcome to my DIY audio forum.CheersPer-Anders Sjöström
Started by galouche, June 14, 2007, 06:44:29 PM
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Quote from: peranders on November 02, 2009, 03:49:50 PMWhat is your supply voltage?Voltages across and values:R16R17R18R19R3 = 22k?Voltage across?
Quote from: peranders on November 08, 2009, 11:10:06 AMThose currents you have right now will still get you incredible low distortion but if you want to increase the idle current a bit, lower the value of R16, R17.
Quote from: peranders on April 09, 2010, 03:58:39 PMCap: it's not critical as long as it fits proberly.
QuoteBalanced mode: Use one pcb to each channel.
QuoteReference: I'll recommend a SMD part but you can of course use a holemounted part but it's a positive thing to have the parts close to each each other.
QuoteFuse: Will probably work alright with the original values. These fuses are rather slow.
QuoteServo: Yes, they are a part of the audio chain for frequencies up to 1 kHz but the part of the audio signal is very low. It's onlÃ½ below 10 Hz the have a major impact and at those frequencies even the the old 741 is good.
QuoteThey should be decent at least. OPA134 is much more than you'll need so you won't gain much to have a really good opamp unless you already have them and don't have to pay for them.
QuoteInput cap: You should not exclude unless you have a low impedance connection to your signal source. The trimpot is a must if you have a high impedance DC-path (which you will have if you'll use an input cap) in order to inject base current let the DC-servo work less.
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