Hello, i just build a pair of these amplifiers, but there are missing 3 capacitors (c3, c15 ; c16)
It seems that the standard 22p for c15 , c16 is too low, if you set itcto 33p the sound becomes warmer.
What if i do mot mount c3, what is the effect and if i just do leave the 3 capacitors open? Sorry im more used to build tube amplifiers but i wanted to build these because i have the kits for such a long time now.
Thank you
The voltages are + and - 24v
It seems that the standard 22p for c15 , c16 is too low, if you set itcto 33p the sound becomes warmer.
What if i do mot mount c3, what is the effect and if i just do leave the 3 capacitors open? Sorry im more used to build tube amplifiers but i wanted to build these because i have the kits for such a long time now.
Thank you
The voltages are + and - 24v
Attachments
It may be that the omission is deliberate, so the owner/builder can choose what kind of sound they want.
C3 plus its series-connected resistor will affect the amp's high frequency open loop gain, but I think it only comes into play above the audible frequency range. Not totally sure because I can't make out the value of the series resistor. Leaving it out will increase the OLG but, since it's acting in parallel with the speaker load, the impact may not be all that significant. It MIGHT be a problem if the amp's output isn't connected to anything -- that would maximize the OLG and perhaps result in high frequency oscillation. Not good, that sort of thing can destroy output transistors.
C3 plus its series-connected resistor will affect the amp's high frequency open loop gain, but I think it only comes into play above the audible frequency range. Not totally sure because I can't make out the value of the series resistor. Leaving it out will increase the OLG but, since it's acting in parallel with the speaker load, the impact may not be all that significant. It MIGHT be a problem if the amp's output isn't connected to anything -- that would maximize the OLG and perhaps result in high frequency oscillation. Not good, that sort of thing can destroy output transistors.