rowemeister said:Mikko
Don't let him touch anything lol
Brent
Hey, I upgraded a friend's amp last night, and it still works perfectly!
SimontY said:
Hey, I upgraded a friend's amp last night, and it still works perfectly!
Hi Simon
What precisely did you do ?
Ricardo
UV101 said:Can you guess why I'm smiling????
Looking very good indeed.
What is powering your DAC analog +5v ?
Ricardo
Sherwood AX-4050R mods
Well it's a cheap amp and had lots of poor quality parts inside, so I did some part swaps with bits I have lying around:
* main psu caps 4700uF Samwha --> 10,000uF Elna For Audio
* pre op-amp KIA 4559 --> BB OPA2134 with 1uF across V+-
* Pana Fc on op-amp
* Pana Fc after reg
* 220 / 25V Samwha before reg and - rail (no reg on - rail!) --> Nichicon 2200u / 35V
* PSU resistors on +-15V 100R --> 10R each
* DC blocking caps (tiny polar elcos!) before op-amp shorted
* CD input RCAs replaced for quality ones (they were going faulty)
* 1uF cap on 15V feeding input switching IC --> Pana Fc
I'll hear his impressions later...
Well it's a cheap amp and had lots of poor quality parts inside, so I did some part swaps with bits I have lying around:
* main psu caps 4700uF Samwha --> 10,000uF Elna For Audio
* pre op-amp KIA 4559 --> BB OPA2134 with 1uF across V+-
* Pana Fc on op-amp
* Pana Fc after reg
* 220 / 25V Samwha before reg and - rail (no reg on - rail!) --> Nichicon 2200u / 35V
* PSU resistors on +-15V 100R --> 10R each
* DC blocking caps (tiny polar elcos!) before op-amp shorted
* CD input RCAs replaced for quality ones (they were going faulty)
* 1uF cap on 15V feeding input switching IC --> Pana Fc
I'll hear his impressions later...
rowemeister said:Mikko
Don't let him touch anything lol
Brent
I dropped from my work chair while reading your discussion. Absolutely amusing guys !
Simon seems to be quite an engineer ?
Have a nice weekend everybody, do not solder all the time.
Mikko H. said:Simon seems to be quite an engineer ?
Have a nice weekend everybody, do not solder all the time.
Yeh, a demolition engineer... who hides behind the sofa for switch-on. Ok, I'm not that bad anymore hehe
I've planned to do some mods to my other CD player this weekend actually!
SimontY said:
Yeh, a demolition engineer... who hides behind the sofa for switch-on. Ok, I'm not that bad anymore hehe
I've planned to do some mods to my other CD player this weekend actually!
No you are not so bad now. You hide behind a chair instead lol.
Oh no! does that mean you will be bringing it in on monday hehe.
Brent
SimontY said:Probably just adding a 5V super reg on the DAC and new power supply for the C1 clock... shouldn't be a problem!
What CDP are you working on Simon ?
My CD53 is still waiting for the coax mod but I am too busy right now.... (secretly building Salas Riaa)
Ricardo
RCruz said:
Looking very good indeed.
What is powering your DAC analog +5v ?
Ricardo
Blimy guys, I go off to do some proper work for a day and the forum goes mad!!!!!!
Ricardo - the 5v analogue DAC is powered by seperate TX winding into a PSU 10,000uf mudorf and an SReg.
I've still got a use for several more Sregs me thinks but thats not till next month!
(Am I allowed to join in the michael extraction yet?)
Simon, do you usually blow things up then or use a wreking ball for your demolition!!!
Ian
UV101 said:(Am I allowed to join in the michael extraction yet?)
Simon, do you usually blow things up then or use a wreking ball for your demolition!!!
Ian
Go ahead, I can take it
But there's a "c" in wrecking ball
RCruz said:What CDP are you working on Simon ?
Philips CD650 featuring the famous TDA1541A DAC chip. I dropped a 5V super reg on the DAC before the pub, and it's really opened up. Still a lot more shut-in than my CD63KI was at its peak, however... but more "correct" sounding in timbre and dynamics.
Simon
SimontY said:
Philips CD650 featuring the famous TDA1541A DAC chip. I dropped a 5V super reg on the DAC before the pub, and it's really opened up. Still a lot more shut-in than my CD63KI was at its peak, however... but more "correct" sounding in timbre and dynamics.
Simon
Does it have any other mods? Do you think there is potential with more work on PSU's clock decoupling etc??
I've read lots of very positive stuff about that DAC.
here's the missing "c" lol
UV101 said:Does it have any other mods?
New caps all round, C1 clock w/S-reg, LM4562, shielding, extra psu for digital filter, S Power on dig. filter, silver sockets, Supreme output caps, oak feet, damping, schottkies, changed 1541 for 1541A etc..
http://www.diyaudio.com/forums/showthread.php?s=&threadid=133780&pagenumber=1
Sorry for continual off-topic
UV101 said:
(Am I allowed to join in the michael extraction yet?)
Ian
You have posted @ least once so yes you are allowed to extract the urine...... out of simon
Brent
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