[Heath] audio tube sb101

[Bill Cromwell]

On 02/28/2014 10:53 AM, RAY FRIESS wrote:
> Anyone have a spare audio output tube for an sb 101?  My rig howls 
> when I turn up the volume more than one quarter.  I removed product 
> detector to isolate the audio stage and it still occurs.  Removing the 
> audio tube eliminates all sound.  Think the tube is bad.  Ray. Wa7itz

That sounds like a bad bypass cap.

73,

Bill  KU8H