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Tung-Sol EL34B noise in PrimaLuna Dialogue HP Integrated

I recently purchased 8 Tung-Sol EL34B to replace the stock tubes in my PrimaLuna. Sound is fantastic, a definite improvement on the stock EL34s, which has only improved after a good 60-70 hours play time.

That said, there is a strange noise coming from the tubes, almost a hiss (hard to describe). The noise isn't coming through the speakers, which are perfectly quiet, nor does it change with volume.

Have tried swapping in and out with the stock tubes to see if it's just one or two bad Tung-Sol tubes but seems to be consistent across all.

Anyone experienced anything similar with these tubes/other tubes?

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Topic - Tung-Sol EL34B noise in PrimaLuna Dialogue HP Integrated - aperfectcircle 19:06:20 04/24/17 (3)


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