Tubes Asylum

Posted by Chris Spafford (A) on November 02, 2002 at 18:42:13

In Reply to: Any thoughts on my MC275's snap, crakle and pop? posted by R.B. on November 02, 2002 at 18:12:58:

The possibilties are nearly endless, but here are the most likely, with the most likely first, least/last: 1: Bad tube-- could be any. 2. Leaky coupling capacitor 3. A carbon composition resistor (most likely a voltage dropper that sources a front end tube) has deteriorated and is intermittently opening and closing, electrically speaking. I've seen carbon comps that looked fine, maybe a bit darker brown than normal, that crumbled upon being touched. 4. Loose tube socket-- again, intermittent contact. These WAGs are based on the original 275, which I owned and loved and thus stared at for hours and hours. I have never seen inside a reissue.