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05/01/25 at 03:48:57

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6n2p's in SE34I.2 extremely noisy (Read 5557 times)

kafkaesque

Ex Member

6n2p's in SE34I.2 extremely noisy
06/01/07 at 18:45:34

My set up: Dec685-->SE34I.2-->HDT's.

Just to preface, Steve and I have been trying to troubleshoot the problem but I thought I would toss it out to the forum for more input.

In short, ordered the 6n2p's and while they were CLEARLY superior they were extremely noisy. Thought they were bad so sent them back to Steve and they actually tested good. Steve then personally auditioned another pair on a SE34I.2 and they are still extremely noisy.

The real pisser is that I love the 6n2p's, but at lower volumes the crackling drives me to drink! Shocked

I'm thinking the problem may be my source, namely, the Dec685 injecting too much input voltage.

Would appreciate any thoughts

Ted :

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Rob

Senior Member

I love YaBB 1G -
SP1!

Posts: 72

Re: 6n2p's in SE34I.2 extremely noisy
Reply #1 - 06/01/07 at 19:48:00

I have been rolling 6n2p's in my pair of Selects w/ the HDTs.

I have found several of them to be VERY white noisy. i.e. the 'crackling' sound.

I bought a lot fo 50 of them, cheap (about $2.38/ea) - I've tried about 20 of them, and found 6 very noisy ones, the rest fine.

I've sent 10 off for cryo-ing, I'm hoping that might help a bit, and make the good ones even better.

(2) SE84C-Selects
HDTs w/Aurum Cantis Ribbons on home-made 2" solid maple plinths
Sunfire True Sub(x'ed@42hz/o gain)
Shanling CDT100(hot-modded)
PSAudio 600
Custom 99.999% silver sprk cables & ICs
Decware silver/teflon "Y"
Lots-a-tubes,cones & spikes

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Tish Ex Member	Re: 6n2p's in SE34I.2 extremely noisy Reply #2 - 06/02/07 at 17:15:49 Hi Ted, I have had the same problem with the crackling sound and tried a different pair of the 6n2p in my SE34I.2 and it went away. Must be a random thing. Tish
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Craig Ex Member	Re: 6n2p's in SE34I.2 extremely noisy Reply #3 - 06/02/07 at 18:33:45 I get the crackling with this combo, also. Mine goes away once it has warmed up. Thanks for leeting me know the cause. Mine was not that bad, and in just one channel.
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musgofasa

Seasoned Member

Where is that
monkey? I want to
shoot something!

Posts: 556

Re: 6n2p's in SE34I.2 extremely noisy
Reply #4 - 06/03/07 at 01:19:50

Have you got an alternate source unit with low voltage output to try?
Maybe an MP3 player or something you can use just to see if the overdrive input is causing it?
I think Steve might be able to adjust the 685 if that is the case.
I don't have enough experience with tubes to offer any other suggestions, but I thought I would throw a hat in the pile lol

Take care,
Robert

The graveyard is full of important men

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Jason Senior Member Posts: 71	Re: 6n2p's in SE34I.2 extremely noisy Reply #5 - 08/13/07 at 21:33:39 If you can source them, the 6n2p-EB seems to be better. I got a bunch of both (EB/EV and non EB/EV) and the so far every second one of the non mil-spec ones seem to be noisy. Jason
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