[sam6550a]

None of my tubes were sent with the Freya .

The buzzing has to be the tubes because a) you don't get the problem in FET or passive modes b) Schiit could not duplicate the problem because they probably used their "test" tubes on the bench.

 

[sam6550a]

Thanks for the offer , I am going to ask a local dealer to test .

Be careful---depending upon the tube tester and how it tests the tubes, heater-cathode leakage may or may not be detected. The best method is substitution of known good tubes.

 

[cskippy]

Also, the buzzing could be interference from a Wifi router, your cellphone, or another piece of electronics. Have you tried disconnecting all input cables to Freya and seeing if the noise gets better?

 

[hornytoad]

Also, the buzzing could be interference from a Wifi router, your cellphone, or another piece of electronics. Have you tried disconnecting all input cables to Freya and seeing if the noise gets better?

Well the buzzing stops when I tap the tube , usually

 

[cskippy]

Then that's tube microphonics/ a noisy tube.

 

[hornytoad]

Then that's tube microphonics/ a noisy tube.

Man I have had such tough luck with tubes : stock tubes were terrible , Tung-sol new production went noisy after 60 days , now Shuangang Treasure tubes are noisy ( these sound very good and had no noise for about 20-30 days , now all of them are noisy at some point )
Oh well .

 

[cskippy]

That's my one issue with Freya, is the gain makes tube noise far easier to hear. You would need very inefficient speakers to lower the noise. I hope with a Freya 2 they offer maybe two gain levels in tube mode: high gain, where it's currently at, and low gain, maybe just above 0dB gain, so that Freya could be used with more speakers without issue.

 

[hornytoad]

That's my one issue with Freya, is the gain makes tube noise far easier to hear. You would need very inefficient speakers to lower the noise. I hope with a Freya 2 they offer maybe two gain levels in tube mode: high gain, where it's currently at, and low gain, maybe just above 0dB gain, so that Freya could be used with more speakers without issue.

Hell im using Kef ls50’s in one setup . They are pretty inefficient .

 

[hornytoad]

Then that's tube microphonics/ a noisy tube.

Well , this is what the seller said so I’m confused :
If the problem is discontinuous, this is vibration and noise of some transformers in the power.

 

[whatcomfalls]

Are all your tubes noisy? Do they all buzz?

 

[hornytoad]

Are all your tubes noisy? Do they all buzz?[/
Hard to say . At least two of the four buzz off and on at random times . I know I have switched up these tubes , left to right and gain to output , and I still get this intermittent buzzing noise I can hear through the speakers . It usually doesn’t last long , maybe 3 seconds tops .
I can hear it at the listening position on quiet music 6 feet away .

 

[motberg]

Hi, I am not a Freya owner, but thought maybe helpful to mention a problem that I have had with various tube preamps.
I do not know the source, but with a few different tube preamps and dacs I sometimes encounter an low-level, intermittent high-pitched squeak, something like +6db at 7.5khz.
I found that this could be alleviated by using shielded balanced XLR interconnects (non-shielded XLR still lets the squeak through).

I guess I have been lucky with tubes, as I have tried over 50 different types (small sized tubes - NOS, used and new) in the past 10 years and never encountered discernible hissing or buzzing..

 

[hornytoad]

Hi, I am not a Freya owner, but thought maybe helpful to mention a problem that I have had with various tube preamps.
I do not know the source, but with a few different tube preamps and dacs I sometimes encounter an low-level, intermittent high-pitched squeak, something like +6db at 7.5khz.
I found that this could be alleviated by using shielded balanced XLR interconnects (non-shielded XLR still lets the squeak through).

I guess I have been lucky with tubes, as I have tried over 50 different types (small sized tubes - NOS, used and new) in the past 10 years and never encountered discernible hissing or buzzing..

I use Mogami Gold xlr's .Not sure if they are shielded

 

[whatcomfalls]

I sue Mogami Gold xlr's .Not sure if they are shielded

I use these too. I believe they're copper shielded. FWIW, I've got about 20 NOS 6sn7s, with about half of them unsuitable for a pre-amp (i.e. either noisy,Overly microphonic, or both).

 

[hornytoad]

I use these too. I believe they're copper shielded. FWIW, I've got about 20 NOS 6sn7s, with about half of them unsuitable for a pre-amp (i.e. either noisy,Overly microphonic, or both).

I use these too. I believe they're copper shielded. FWIW, I've got about 20 NOS 6sn7s, with about half of them unsuitable for a pre-amp (i.e. either noisy,Overly microphonic, or both).

Thanks for the reply. I guess tubes can really be quite fickle.

I tried some silicone rings and they did nothing.

I am going to try Herbies tube dampers as its only 100 bucks. I have nothing to lose!