# BHK preamp emits high-pitched whine when warm

**URL:** <https://forum.psaudio.com/t/bhk-preamp-emits-high-pitched-whine-when-warm/7510>\
**Category:** Preamplifiers\
**Created:** [October 23, 2018, 12:02am UTC](https://forum.psaudio.com/t/bhk-preamp-emits-high-pitched-whine-when-warm/7510 "2018-10-23T00:02:16Z")\
**Posts on this page:** 1\
**Page:** 3

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**Author:** ![night\_flight](https://avatars.discourse-cdn.com/v4/letter/n/ee7513/32.png) [@night\_flight](https://forum.psaudio.com/u/night_flight)\
**Post date:** [November 14, 2022, 6:17pm UTC](https://forum.psaudio.com/t/bhk-preamp-emits-high-pitched-whine-when-warm/7510/44 "2022-11-14T18:17:57Z")

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Interesting information here. I’ve had similar issues. I “upgraded” from the PSvane to the Genalex (Upscale, Kemin’s stash). I only had the issue with 1 of the Genalex tubes. I just got a replacement last week and I have a slight buzz when turned on, it quickly goes away. From my experience, I was able to solve the issue by finding the right tubes. Having done all of this, My biggest learning is probably that I should have left the Psvane in place.

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