ok i can understand that..but what are we trying to succeed with that?
Triodes and pentodes sound different - and triodes also put out less power. Some people prefer the way a triode sounds, and accept the lower power.
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ok i can understand that..but what are we trying to succeed with that?
hi flat5 sorry for my late responce... what's that you wanted me to do?
i measure 9.5VDC
And what value cathode resistor was that?, you've changed it so much.
The amplifier cannot reduce distortion from the MP3 player that has its output clipping because its volume control is way too high.distortion? well.... if my mp3 player volume and my amp's volume are wide open then yes you don't listen anything other than distortion. but if i'm having my mp3 reasonably high there is NO distortion even if i'm having my amp's volume at maximum.
The output transformer reduces the level of low frequencies and high frequencies.quality of sound? not bad! but something is missing and i don't know what...
The amplifier cannot reduce distortion from the MP3 player that has its output clipping because its volume control is way too high.
The amplifier will also clip if its input signal is too high.
The output transformer reduces the level of low frequencies and high frequencies.
The high output impedance of the output transformer stops it from damping resonances of a speaker.
The bass is muddy not clear and tight.
The high distortion of the tubes causes a form of compression so that the "punch" of some songs is missing.
220ohm.
the EL84 don't turn red anymore.
first time in my life i hear such ~5.5W the amp is really strong and i'm not kidding at all! it reminds me the TDA1557 as power output. (maybe my speakers are too sensitive i think >90dB).
The capacitors at the el84 anodes helped alot, but noise still exists especially when i let the input floating. (shorting the inputs makes the noise less in that case)
distortion? well.... if my mp3 player volume and my amp's volume are wide open then yes you don't listen anything other than distortion. but if i'm having my mp3 reasonably high there is NO distortion even if i'm having my amp's volume at maximum.
nevertheless it's fine...
distortion is fine (acceptable even without nfb)
output power is awesome (this is not 5.5W!!!! unless i have never heard true 5.5W, my 2.1 active PC speakers suppose they are 10W RMS) and it's half loud!
Those speakers lack low frequencies when driven from a solid-state amplifier that has an output impedance of 0.04 ohms or less.
while tube amps like mine have output impedance 8ohm..right?
ok...so what should i do to simulate low damping factor? i got a chip amp
on my desk...should i connect a 4ohm/5w resistor from the output in series with the speaker?
Also, I hope your not using guitar speakers, they are unsuitable for music. Guitar speakers have no-coil gaps at each end of the voice coil assembly so they dont burn out when over driven, thats why they can be driven hard and sound so loud, but they distort to hell (again, the kind of sound guitarists look for ;-).