REVIEW: DARKVOICE 3322 - Page 32

dxanex, have you really made sure the tubes are pressed down against the socket properly? I had hum during tube rolling once but it went away with some fiddeling with the sockets... Also, new tubes may hum during burn-in.

Quote:

Originally Posted by SgtE 

dxanex, have you really made sure the tubes are pressed down against the socket properly? I had hum during tube rolling once but it went away with some fiddeling with the sockets... Also, new tubes may hum during burn-in.

Quote:

Originally Posted by hifimanrookie 


Yeah..i gave that advice also..fiddling helped with my 337

Yeah, I've tried pressing down on the tubes to the point that I was actually concerned I may damage the tubes. I finally got a hold of the seller, and he said he would contact one of the engineers and see what they say, so there's that...

At least with my Senn HD650's it's not too much of an issue. But with my AKG's it's really quite annoying. I've also let the new tubes burn for 5-6 hours straight one morning and still no change in the hum at all :/

Now I wonder if the tube sockets could be bad? There is a seller on eBay selling replacement ceramic tube sockets for pretty cheap. I wonder how hard it would be to replace the sockets? I know nothing of engineering, but I can replace components inside my PC just fine...but if there's soldering involved, forget it!! 

Quote:

Originally Posted by dxanex 

 

Yeah, I've tried pressing down on the tubes to the point that I was actually concerned I may damage the tubes. I finally got a hold of the seller, and he said he would contact one of the engineers and see what they say, so there's that...

 

At least with my Senn HD650's it's not too much of an issue. But with my AKG's it's really quite annoying. I've also let the new tubes burn for 5-6 hours straight one morning and still no change in the hum at all :/

 

Now I wonder if the tube sockets could be bad? There is a seller on eBay selling replacement ceramic tube sockets for pretty cheap. I wonder how hard it would be to replace the sockets? I know nothing of engineering, but I can replace components inside my PC just fine...but if there's soldering involved, forget it!! 

Changing parts in a computer is one thing, doing soldering in a tube amp is a totally different matter.

A tube amp hold lethal amounts of volts if you dont know what you are doing.

alright, so I spoke with the seller again who has spoken with the engineer. He told me to take the driver tubes out of the sockets and leave the amp on for 48-72 hours and the humming noise should disappear. Sounds weird, but I guess I'll try it....

Quote:

Originally Posted by hifimanrookie 


Never heard that one..well try it..u have nothing to loose right..so if it dont work u can sent it back to them?

Well, I probably can. I would just like to avoid that if possible. I have to pack it up, ship it to China which takes half a month, duty fees, etc. then wait for a replacement... It's just an overall pain in the rear-end. That and it sounds sooo good with my new HD650's...I'd be lost without it for that long.. 

Ok, so I finally figured out what the humming problem was. It was the flippin' SVETLANA POWER TUBES... after going through several driver tubes, burning in, leaving the amp on for days with and without tubes, cleaning with deoxit, sacrifice to the audio gods, ceremonial dances, ect. I finally had the genius idea to take out the Svetlana 6S19P-B tubes and replace them with the original stock Chinese power tubes (I had to dig them out of a box in the closet) and lo-and-behold all the humming stopped...like completely gone with all my EF95 tubes.

So needless to say I am very happy now that I've gotten to the bottom of it, but at the same time I'm a little disappointed with the Svetlana tubes. Obviously, they must be faulty in some way...maybe some components/impurities loosened themselves from the glass during shipment? Who knows...but that sucks, considering the Svetlana tubes are supposedly superior to the Chinese power tubes. But I'm relieved that it's just the tubes and not a fault with the actual amp. For now I'm sticking with the Chinese power tubes, with the Tung-Sol 5654W driver tubes this thing still sounds fan-frickin'-tastic.

I have a problem of humming with my 3322. I try to change all tube with another set of tube, but had no result, just a little difference in humming sound.

I find a curious problem, when I close right volume I can hear, with very very low intensity, local radio. When I just put on a little of volume, radio cut. When I close left side, they affect sound of right side radio. 
I have no radio receiver in my room :P

It's my power source doing that and doing humming?

Someone have experience of 3322 with HD-800?