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6H30 tubes ringing in BAT VK-300SE

I have had this issue in nearly every 6H30 tube I have bought for my BAT VK-300xSE integrated. Whenever I switch inputs, or the unit comes out of warm-up mode, or out of mute, I get a high pitched ping followed by a ringing sound out of the speakers.

I have tried 3 different sets of tubes- two pairs of Electro Harmonix gold pins, and one set of Sovteks. Eventually it gets to the point where if I tap on the chassis of the BAT, I get the high pitched ping/ringing out of the speakers. The last new set of EH's I bought, when I pulled them out of the box brand new, and tapped on the side of them with my finger, bingo- it audibly rings in my hand!

It doesn't seem to affect the sound, but none the less, are there any good sources for QUALITY 6H30 tubes? I am not going to pay $300-$400 for a pair of the "New old Stock" DR tubes. I have bought all of the Sovteks and EH's from Music Direct. Maybe they got a whole batch of bad ones?

Please Help!!!
mekong56

Showing 1 response by jfrech

jfrech's avatar
jfrech
1,816 posts
 
Walkertm: My 51SE behaves like your BAT pre. I think this is a "undocumented feature" of either the preamp or just the tube, doesn't effect sound qaulity, and I've never worried about it in the 10 yrs I've owned my 50SE now 51SE...

My guess is the mute relay is close enough that when the relay engages/disengages that mechanical process jiggles the tubes just enough for the pinging sound.

You don't have anything to worry about in my opinion. Save your money on tube rolling and just enjoy that BAT sound, you have a killer integrated amp !
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