I been talking to joeyoravec about a scsi issue ( The 50 pin IDC ribbon cable connector ). during that conversation, He sent me the Link about this audio issues.
I do agree that the odd noises that this amplifier section make is most likely due to it's odd design. Something struck a cord with me when he said " I concluded that the design is the problem -- the current through the diode causes this fluttering sound."
One of the things I repaired in the late 70's was a piece of audio equipment using an IC opamp design and not the old fashion tube design of the day. The fix was to replace the typical silicon diodes with a germanium diode because it had different audio characteristics
While trying to fine the audio characteristics of the germanium diode, I ran across this.
Every part matters in sound with diodes being NO exception. The typical run-of-the mill diode found in most audio products typically produce nasty distortion and ringing resulting in treble hardness, grit, image blur, poor resolution,etc... Probably one of the most cost-effective modifications is to replace these with high performance Ultra Soft-recovery diodes. You'll hear much cleaner highs, increased resolution, more palpable mids, and tighter bass! Absolutely a must for any mod due to its low low costs!
From this web site.
http://www.referenceaudiomods.com/M...reen=CTGY&Store_Code=RAM&Category_Code=DIODES
Now while this won't 100% cure the poor audio design in the first place, It might improve the design enough for most people out there.
I do agree that the odd noises that this amplifier section make is most likely due to it's odd design. Something struck a cord with me when he said " I concluded that the design is the problem -- the current through the diode causes this fluttering sound."
One of the things I repaired in the late 70's was a piece of audio equipment using an IC opamp design and not the old fashion tube design of the day. The fix was to replace the typical silicon diodes with a germanium diode because it had different audio characteristics
While trying to fine the audio characteristics of the germanium diode, I ran across this.
Every part matters in sound with diodes being NO exception. The typical run-of-the mill diode found in most audio products typically produce nasty distortion and ringing resulting in treble hardness, grit, image blur, poor resolution,etc... Probably one of the most cost-effective modifications is to replace these with high performance Ultra Soft-recovery diodes. You'll hear much cleaner highs, increased resolution, more palpable mids, and tighter bass! Absolutely a must for any mod due to its low low costs!
From this web site.
http://www.referenceaudiomods.com/M...reen=CTGY&Store_Code=RAM&Category_Code=DIODES
Now while this won't 100% cure the poor audio design in the first place, It might improve the design enough for most people out there.
