Hello forum,
it´s great to have a platform like you, that makes it possible to get into audio segments never been thinking of.
On my audio road, I`ve built an Aleph J some times ago, driven by a Salas UFSP and a Transcendent Sound phonostage.
Unfortunately my hifi rig began to lack of bass and pornounced highs in the last days, without chaning anything. At first I tried another phono cart, then switched between the two ponostages an nothing really changend.
So my suspicion is, that something went wrong with the main amplifier. Been using it excessivly in the last hot summer and noticed that the electrolytics got really hot.
What do you think? Can this be the reason for the sound probs (drying out)? All parts look normal. Bias is checked and ok. No audible humm.
Many thanks and best
Rents
it´s great to have a platform like you, that makes it possible to get into audio segments never been thinking of.
On my audio road, I`ve built an Aleph J some times ago, driven by a Salas UFSP and a Transcendent Sound phonostage.
Unfortunately my hifi rig began to lack of bass and pornounced highs in the last days, without chaning anything. At first I tried another phono cart, then switched between the two ponostages an nothing really changend.
So my suspicion is, that something went wrong with the main amplifier. Been using it excessivly in the last hot summer and noticed that the electrolytics got really hot.
What do you think? Can this be the reason for the sound probs (drying out)? All parts look normal. Bias is checked and ok. No audible humm.
Many thanks and best
Rents
Road to Hell is paved with good intentions ..... 
trust in your own ears/tests more than to any hipster on Internet
trust in your own ears/tests more than to any hipster on Internet
Or measure. Post frequency response of an amplifier itself. If you have laptop, you can make very comprehensive set of measurements.
Ears can be deceiving. Sometimes it helps to hold your nose and push air gently. After a pop or two, suddenly bass comes back 🙂
Ears can be deceiving. Sometimes it helps to hold your nose and push air gently. After a pop or two, suddenly bass comes back 🙂
Happened to me once, turned out both of my woofers foam surround were out. 🙂
C3 220uF maybe?
You know, I completely idiot for electronics, it is just a feeling, lack of any knowledge.
This is an electrolytic, polarity is O.K.?
You know, I completely idiot for electronics, it is just a feeling, lack of any knowledge.
This is an electrolytic, polarity is O.K.?
1) MEASURE the amplifier response as suggested above.
2) MEASURE supply ripple
3) MEASURE capacitance
4) replace main caps
5) post results
2) MEASURE supply ripple
3) MEASURE capacitance
4) replace main caps
5) post results
Many thanks for all your answers.
Problem is solved.
My suspicion turned out to be right. Changed the electrolytics on the singal pcbs.
Now the Aleph sounds like it should.
Have a good weekend
Rents
Problem is solved.
My suspicion turned out to be right. Changed the electrolytics on the singal pcbs.
Now the Aleph sounds like it should.
Have a good weekend
Rents
