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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  (System | Threads | Answers | This Thread) 08-19-04

Responses (1-18 of 18)

Click title to read one, or click date to read all below it. 08-19-04   Odds are that the tubes installed have thermionic emissions, ...   Jig 08-19-04   Jig is correct. some 6922/6dj8 tubes are more prone to micro ...   Slipknot1 08-19-04   (1)yes it's microphonics alright. using a pencil-eraser, gen ...   Bob_bundus 08-19-04   Thanks for the replies. so if it is indeed microphonics, wh ...   Speedracerucr 08-19-04   I have had good success with hal-o's. i also have had good l ...   Slipknot1 08-20-04   It should not be necessary to waste money on tube dampers as ...   Brucegel 08-21-04   It seems to me that the surest thing i can do to eliminate t ...   Speedracerucr 08-22-04: Brucegel Tesla and sovtek from the tube store or any reputable seller will do. Brucegel  (System | Threads | Answers | This Thread) 08-28-04   Thanks everyone for your help. an update on my original pro ...   Speedracerucr 12-22-04   I would like to add to this forum by saying the sp-2b is a z ...   Phd 12-23-04   I had the same issue (same tubes)-john suggested reseating t ...   Orind 12-23-04   Hi orind, by reseating them, do you mean removing the tubes ...   Phd 12-23-04   Jig is pulling your leg. all tubes operate on the principle ...   John_tracy 12-23-04   Yes. you can always call john at musical concepts if you hav ...   Orind 12-24-04   My expirience with the emotive audio sira le is same. i swit ...   Linkoping 12-24-04   Linkloping. much like the 6dj8/6922 family of dual triodes , ...   Ecclectique 12-24-04   I'm sorry to disagree on christmas eve, but brucegel's sugge ...   Boa2 12-24-04   Amen boa2!   Ecclectique

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