LCA 2B schematic needed

[skeptic12]

Hi-

I have been scouring the site for this.  all links seem to be dead.  Anyone have a copy?

Thanks in advance

 

[gyraf]

What problem are you seeing, perhaps we can help on that?

 

[skeptic12]

thanks Jakob

I am hearing spitting and crackling on channel 1, I have replaced the plate supply resistors and cathode caps (they were installed backwards by someone at some point).  seems to be coming from somewhere after ecc83 and around ecc82.  when I pull the ecc83, the crackling goes wild.

I'm going to replace the cathode resistors next just in case they sustained any damage with the backwards caps.  all the voltages are pretty spot on

 

[fazer]

Is there a posting? I have one and those kind of problems were due to either the tubes. Or can be from sockets getting dirty.  Also check the tube heater dc supply.  It produces a lot of heat and gets corrosion on solder joints. 

 

[mjrippe]

Too big for Tech Docs section, so I have it on Dropbox for a while:
https://www.dropbox.com/s/ut4mayp5zgggio4/LCA-2B.pdf?dl=0

 

[skeptic12]

thanks!  the link was dead on the other posts