Yamaha C-4 dc fluctuation

[Hifibythekg]

Has anyone got a Yamaha C4 in which the DC maintains a stable readout within + /- 200mV of 0mV?

If so, how close to 0mV has been achieved? And did any component(s) need replacement to achieve this?

My understanding is that it’s actually very common to for this preamp to produce the full range of + / - 200mV, and will even go beyond this every now and then.
I’ve already replaced the trimpots on my own amp but the readings continue to jump about .

 

[Vint Age]

Like Dave said in your other thread on the same subject:

There's a reason Yamaha adjustment parameter is 0 +/- 200 mv.. I get it close to the ballpark and forget about it. But thats me..

Like he also said already, input FET's can drift around a fair bit ...

 

[Hifibythekg]

Thanks Vint Age, appreciated.
Yes, and Avionic’s views and advice very gratefully accepted, he’s taken the time to help me out (rescue is a better word) so much on this and several other repairs.
Buttoning up my C4 and hoping that it will perform to its optimum, it crossed my mind that, unless anyone can say differently, every other owner just has to accept the same, or worse, jumpy / extended DC syndrome.
A better question might have been, can one even hear the effect of 200mV DC on a preamp’s output?

 

[avionic]

can one even hear the effect of 200mV DC on a preamp’s output?

Probably not.

 

[Hifibythekg]

Brave man!
: )
But, seriously, thanks - reassuring to hear.