Preamp Corrupting tubes

Tweakers' Asylum

Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

Have a preamp with two 6N1P tubes and a 6X4 tube rectifier. The left channel 6N1P tube seems to last for approximately 12 hours before it starts to either get noisy or starts to have high frequency distortion. Any simple things I might start looking into before I take it to a local repair shop? Does this happen often? Help!

Thanks for any advice.

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Topic - Preamp Corrupting tubes - sept79 10:56:09 11/19/07 (7)

RE: Preamp Corrupting tubes - reb 09:04:45 11/22/07 (0)

Exchange tube across L & R channel, & hear. (nt) - cheap-Jack 11:36:51 11/19/07 (5)

RE: Exchange tube across L & R channel, & hear. (nt) - sept79 13:09:49 11/19/07 (4)

So the left channel tube is defective, replace it. (nt) - cheap-Jack 13:22:09 11/19/07 (3)

RE: So the left channel tube is defective, replace it. (nt) - sept79 14:14:39 11/19/07 (2)

If this has been a repeating fault,.. - cheap-Jack 12:50:51 11/20/07 (0)

Check tubes' operating points. - sser2 19:03:08 11/19/07 (0)

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