Crackling noise.... pls help on Pre-amp

[tony Ma]

Hi there,

Here is my setting

HTPC - Tera dak - JP200 Clone (from analog metric) tube Pre-amp - B&K st-140 - Statement Speaker (from Jim and Curt Hotlz)

Previuously i have a problem with the PS on Pre-amp

http://www.diyaudio.com/forums/power-supplies/230726-there-any-thing-wrong-design.html

Now the problem is

When I turn on first time, i heard noise (that I define as a crackling) after about ten or fiften minute (about 2 -3 song) the noise is gone

Is this normal?

Is that because the tube need warming up? after 10 15 minute all crackling noise is gone and sound very sweet

Do I need Voltage stabilator?

 

[JonSnell Electronic]

No you don't need a voltage stabilizer you need to find the fault in the preamp and fix it.
ECC83's, dont't work well with such a high impedance on the anodes. 82 to 120K is high enough.

 

[tony Ma]

No you don't need a voltage stabilizer you need to find the fault in the preamp and fix it.
ECC83's, dont't work well with such a high impedance on the anodes. 82 to 120K is high enough.

iam sorry, iam newbee. Can you explain it?

 

[roline]

Check any pots for dirt, tube to socket connections....

 

[DavesNotHere]

clean all flux residue off of pc boards, make sure there is no flux in the socket if you are building point to point.

 

[DavesNotHere]

when all else fails change the tube socket. especially if it is a ceramic one.