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Tube Whine noise...Please Help

Hi everyone.

As a newbe to tubes I am having a problem that I need some help on. I just received my Musical Design SP-2 preamp and while it sounds wonderful, occationally there is a high frequency whine/whistling noise coming from one or both speakers. The SP-2 uses 2 6922 that the previous owners said were NOS RCA types. I want to know if the tubes went bad and needs replacing or if there is another problem that I need to look for. Thanks
speedracerucr

Showing 1 response by boa2

boa2's avatar
boa2
1,551 posts
 
I'm sorry to disagree on Christmas eve, but Brucegel's suggestion of using Tesla or Sovtek 6922 tubes will at best have you bored stiff with the sound, and at worst selling your preamp for betraying you. It has been my experience that until I rolled around in NOS--so to speak--I had no idea what my tube equipment was capable of doing.
I had a pair of Siemens go bad recently, and was relegated to a pair of Sovtek's for a few days. I turned the amp off until the replacements arrived...get my drift?
All the best,

Howard
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