[graben]

How do you know when the tubes need to be changed. Also how do you remove them? Just pull or do they screw in. Sorry I have never dealt with tubes before. I just got the amp and it sounds great with the Lamda Nova Signature just want to make sure it is at it's best.

 

[padam]

Check out this thread:

http://www.head-fi.org/forums/f5/bia...srm-t1-324155/

You need a tube tester if you want to know how much life is left in the tubes but the usually do last very long.

 

[graben]

I am feeling a bit leery about doing this myself. Do you think a shop that sells Stax would be able to do this? I live in Japan so it is just a 30 minute train ride to a few different shops.

 

[nikongod]

most shops that sell STAX should be able to do it. So should any competent tube radio repairman.

 

[graben]

Thank you so much for your help guys.

 

[Michgelsen]

On the other hand, it's really easy. Remove the top of the case and gently pull the tubes out while swinging them round a bit. Do not twist, only pull. When they are out, put in new ones. They only fit in one way. So, it's as simple as pulling the old ones out and pushing the new ones in.
The amp will then work fine again. While it's better to rebias it after a tube change, you're not damaging the amp nor the headphones by not doing that. The simple procedure for that is in the thread padam linked to. You will need a volt meter.

I think it depends on the shop whether they can do it themselves. I'm sure they can plug in new tubes, but I doubt that they know how to rebias it. Maybe they don't even know that can be done. I know of someone who needed new tubes for a SRM-T1 and the shop sent the amp to a Stax service center for that. He had to miss the amp for a two or three weeks. If that's the case, you're better off doing it yourself.

 

[nikongod]

Quote:

Originally Posted by Michgelsen /img/forum/go_quote.gif I think it depends on the shop whether they can do it themselves.

A shop that cant rebias a tube does not really deserve to be in buisness.
Quote:

I'm sure they can plug in new tubes, but I doubt that they know how to rebias it. Maybe they don't even know that can be done.

Thats what the link padam posted is for, right?

 

[milkpowder]

Quote:

Originally Posted by nikongod /img/forum/go_quote.gif A shop that cant rebias a tube does not really deserve to be in buisness.

QTF. It's really quite easy to do, but I remember the time when I actually electrocuted myself doing so and got a few electrical burn scars too

Yeah. Embarassing. Still, it hasn't put me off. I was just being stupid

 

[Michgelsen]

Quote:

Originally Posted by nikongod /img/forum/go_quote.gif A shop that cant rebias a tube does not really deserve to be in business.

Yes, I agree, but that doesn't mean there are no such shops.
Quote:

Originally Posted by nikongod /img/forum/go_quote.gif Thats what the link padam posted is for, right?

That's right. There are also instructions for the rebiasing of a SRM-007t in that thread.