[ohsigmachi]

I, ve been using a GE 5998A power tube & suddenly it started un seating itself after I turn off the amp

If re seat it works fine,what could be causing to lose it seat?

Have you removed/reinstalled the power tube a lot?

You may need a socket saver.

 

[bluzeboy]

Have you removed/reinstalled the power tube a lot?

You may need a socket saver.

thanks ordered one

 

[aisalen]

Like it more than my Jot!

 

[maheeinfy]

Like it more than my Jot!

Are you using HD600/650 with DV ? I am yet to try my HD650 on DV, but with the other easy-to-drive cans i tried so far, there is continuous audible hum in the headphones. I can even hear the hum directly from the amp, if i move my head close to the amp

 

[aisalen]

Are you using HD600/650 with DV ? I am yet to try my HD650 on DV, but with the other easy-to-drive cans i tried so far, there is continuous audible hum in the headphones. I can even hear the hum directly from the amp, if i move my head close to the amp

Yes, I am using both my 600 and 650 more with my DV than the Jot as the DV is way more punchier irregardless of genre I played. I notice that I have also hum for about two weeks of my use, using Sylvania VT-231 and TS 7236, but the hum is gone now. Totally silent even even me not playing anything from the source. So as stated by some here, it will probably gone after burning-in the tube for some time. Before this, I ignore the hum as it is not noticeable when there is a music playing.

 

[maheeinfy]

Yes, I am using both my 600 and 650 more with my DV than the Jot as the DV is way more punchier irregardless of genre I played. I notice that I have also hum for about two weeks of my use, using Sylvania VT-231 and TS 7236, but the hum is gone now. Totally silent even even me not playing anything from the source. So as stated by some here, it will probably gone after burning-in the tube for some time. Before this, I ignore the hum as it is not noticeable when there is a music playing.

I see. hopefully hum will go away in my case as well after some time

Until then i will try and use the HD650 so the hum wont bother me much

 

[aisalen]

I see. hopefully hum will go away in my case as well after some time

Until then i will try and use the HD650 so the hum wont bother me much

Yes, use you 650 as the 600/650 paired great with OTL amp such as this. As per advise from most of users here, Russian made tube seems always have a hum so avoid those.

 

[ohsigmachi]

Yes, I am using both my 600 and 650 more with my DV than the Jot as the DV is way more punchier irregardless of genre I played. I notice that I have also hum for about two weeks of my use, using Sylvania VT-231 and TS 7236, but the hum is gone now. Totally silent even even me not playing anything from the source. So as stated by some here, it will probably gone after burning-in the tube for some time. Before this, I ignore the hum as it is not noticeable when there is a music playing.

Try this: Pull the power tube (big one) and flip on the DV and walk away. Come back 3 days later, hum will be gone.

 

[bluzeboy]

this works like charm
https://blog.thetubestore.com/burning-in-6sn7-tubes-for-the-dark-voice-336se-headphone-amp/

 

[bluzeboy]

Are you using HD600/650 with DV ? I am yet to try my HD650 on DV, but with the other easy-to-drive cans i tried so far, there is continuous audible hum in the headphones. I can even hear the hum directly from the amp, if i move my head close to the amp

this works like charm
https://blog.thetubestore.com/burning-in-6sn7-tubes-for-the-dark-voice-336se-headphone-amp/

 

[dobigstuff]

If you can get the NOS USA Tung-Sol's, they should not hum. None of my tubes (that I have tried) hum in the Darkvoice. (Except those Tung-Sol re-issues)

 

[volly]

Love this combo.

 

[aisalen]

Try this: Pull the power tube (big one) and flip on the DV and walk away. Come back 3 days later, hum will be gone.

As mentioned, I do not have hum now after the tube burn-in of about 3 to 4 weeks playing for 3 hours a day.

 

[Jim Spec]

I have been an advocate of the 6F8G tube for use in the Darkvoice earlier on this Forum. I have since switched to a Bottleneck Crack. After trying many tube configurations I still find that the 6F8G/6C8G provides the best sound as a front-end tube. I especially favor the Tung-Sol 6F8G. These tubes are still relatively cheap but seem to go up every day. It takes a bit of effort to get to the end sound - requiring 2 adaptors. However, in the 336 you would only need one adapter since it uses the 6SN7 tube on the front-end. I have attached a picture - highly recommending this configuration.

 

[UntilThen]

Absolutely. Love the Tung Sol 6F8G with a pair of GEC 6as7g.