This is dead horse and I know it’s not a great CCS due to non-linearity, but I put a 317 set to 45mA on the cathode of my 807 SE amp by passed with a 100uf cap and it starts collapsing as the signal increases. Drops the cathode voltage down to around 2V at full tilt.
I popped in a 250ohm resistor and instantly get way cleaner sine waves at nearly twice the output power before clipping. What causes this? Non-linearity wouldn’t cause what I’m seeing I don’t think.
Thanks!
I popped in a 250ohm resistor and instantly get way cleaner sine waves at nearly twice the output power before clipping. What causes this? Non-linearity wouldn’t cause what I’m seeing I don’t think.
Thanks!
A CCS for a SE amplifier needs to have a time constant in the feedback loop that is longer than the lowest frequency required by the bass bin.
If this is not true the bass will be clipped by the CCS starting to regulate before you want it to start working.
Push pull amplifiers are a lot easier.
If this is not true the bass will be clipped by the CCS starting to regulate before you want it to start working.
Push pull amplifiers are a lot easier.
A CCS for a SE amplifier needs to have a time constant in the feedback loop that is longer than the lowest frequency required by the bass bin.
If this is not true the bass will be clipped by the CCS starting to regulate before you want it to start working.
Push pull amplifiers are a lot easier.
Thanks! I will remove the feedback and see if that helps.
If the LM317 is dead (aka: shorted), 250R then replace the LM317 in the circuit. Of-course there won't be any CCS function coming from the dead LM317.I popped in a 250ohm resistor and instantly get way cleaner sine waves at nearly twice the output power before clipping. What causes this?
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