This sorta has to do with a previous thread re: buzzing in my speakers. Apologies if I should have just put this in that thread. If i put my ear near my BHK pre i hear a buzzing noise. Do other folks who have the BHK PRE hear a buzz noise coming from inside of the pre? Wondering if this the reason…

Are you running Genalex Gold Lion 12AU7 tubes. I personally and others have had that issue with the regulator squealing with those particular tubes.

No still the stock tubes Thanks

Mine did this a while ago. I swapped the tubes left to right, right to left, made sure they were seated tightly and it went away.

Thanks Checked it this morning and no buzz but the buzz still in my speakers Had hoped they were related but alas they are not The buzz in my speakers seems to be related to the pre…i removed the pre and MK1200 from the rack and just hooked them to the speakers With just M1200 on and connected n…

It could be a tube failing or loose. Also try reseating the riser cards that are behind the tubes if they are not soldered into place.

Checkout this thread from last year. [image] BHK preamp emits high-pitched whine when warm Preamplifiers BHK Pre owner here (since late 2019)… I found this thread while google-ing PS Audio BHK preamplifier whining. I too experienced this problem when I decided to replace…

Buzz from inside BHK PRE

Audio Components Preamplifiers

FilTan July 12, 2022, 3:18am 7

Checkout this thread from last year.

Topic		Replies	Views
BHK preamp emits high-pitched whine when warm Preamplifiers	40	4197	November 14, 2022
Buzz in speakers with BHK Pre Preamplifiers	75	1576	August 4, 2022
BHK Pre Noise Preamplifiers	18	715	May 2, 2023
BHK Preamp Transformer Noise? Preamplifiers	8	456	December 8, 2023
Low level buzzing from BHK Pre Amp Amplifiers	26	1297	April 12, 2023

Buzz from inside BHK PRE

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