Change the pre-tubes AD200B MK3

[bulldozer]

Hello, now it´s time to change the two ECC83 & the ECC81 in my "AD200B MK3". Which tubes should i buy/use? Here are some i think to buy:

http://www.thomann.de/de/groove_tubes_ecc83s.htm

or

http://www.thomann.de/de/tad_rt001_roeh ... 2ax7ac.htm

Is there anythink i have to do special, or can i take the old out of the amp and put the new into it? Sorry for this question, but i haven´t done it before. Thanx for your help.

Greatings Klaus

[boroman]

If you have money go for Mullard, Amperex, Telefunken (NOS) brands. If you want buy "in store" check tubeamp doctor http://www.tubeampdoctor.com/- they have a lot of ecc8?'s to choose from. They don't make tubes, but select them and rebrand from other manufacuters to have the best parametres (high gain, low microphonics, etc)

[markjazzbassist]

JJ's get my vote. I've always enjoyed their tone and reliability.