Tubes Asylum

RE: Blown 6CA4?

99.6.52.187

Sondek

In Reply to: RE: Blown 6CA4? posted by Ozzie on January 18, 2024 at 11:02:31

That preamp has to be what, 40 years old by now? If the caps are original equipment, then extremely high likelihood the power supply is culprit, and a new 6CA4/EZ81 won't help.

Mike Elliott of Counterpoint has gone off into retirement sunset, but just about any competent tech could do the job unless you're up to it yourself.

Follow Ups:

RE: Blown 6CA4? - Ozzie 09:15:48 01/19/24 (1)
I am fairly certain the PS caps were changed about 6 years ago. I am going to swap the tube and cross my fingers. Ordered one yesterday. It is worth 25 bucks.
- RE: Blown 6CA4? - 6bq5 10:26:22 01/19/24 (0)
  Ozzie,
  Don't waste the tube-
  
  There is some part of the power supply that has a short-
  A visual inspection could identify it possibly -
  A resistor would be discolored, and may also have burned the PCB below it-
  
  An electrolytic cap may have a bulge on the top, or one end (depending upon axial or radial), or possibly a stain/spray around the base/unit from a rupture...
  
  I realize that the $25 may not be much, but if you have done nothing since the last test, I'll wager $100 that it will blow!
  Happy Listening

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