Mucking around inside my NAD 541i

[av98m 0]

 

 

 

Edited July 26, 2004 by av98m

[av98m 0]

Edited July 26, 2004 by av98m

[jtfoo 0]

Are you leaving the 2 huge Nichicon gold tune lying there, or have you secure it with glue?

[av98m 0]

Not glue. Bluetak.

 

 

Edited July 26, 2004 by av98m

[av98m 0]

3 different opamps were compared over the last 3 weeks, the stock opa2604s, opa2227ps, and finally opa2134s(incidently NAD uses the 2134 in their later model 542). The opa2227ps came out on top, by a significant margin, and they'll be staying out in the player until my opa627s arrive for the final showdown.

 

replacement caps, opamp sockets and iec mod were all done by Mr Firefox.

Edited July 26, 2004 by av98m

[huangyong 0]

may i know what are those white round little things on top of the cd pickup.

looks like bluetag.. is it??

[lekguan 0]

definitely blutack

[bpribadi 0]

Wow, what a mod

[huangyong 0]

and what's that for, pickup damping??

[huangyong 0]

FInally found it.

Is this the one??

Damping

Edited July 27, 2004 by huangyong

[av98m 0]

The idea was just to dampen the transport by filling up the "waffle" pattern on the transport with bluetak in order to (maybe) reduce vibration, I had spare bluetak lying around. The screws on top of the transport were also tightened.

 

The 2 mods that made the biggest difference were:

 

1. opamp change to opa2227p (really transformed the sound of the cdp, female vocals sound better than ever before, better decay and string instruments shine when using this opamp.) Give this opamp a try if you're trying to get a warmer more tube-like kinda sound.

 

2. increasing capacitance of the 2 power caps from 2x puny 1000uf 35v to

2 x 10000uf 56v (improved bass and weight in the sound) 10000uf caps are really way overkill though. It was my idea, I wanted 2 BIG caps.

 

However, YMMV.

Edited July 27, 2004 by av98m