New to tubes

Nah, no stress here. Just a funky connection to the internet or bad browser. I cleaned up the mess before you replied (phew). It was hangin' up on me and I didn't think it posted after five minutes. Yeah, you have ECC88's which are the same as 6922's. Lifespan is rated at around 10,000 hours tops, depending on the pre. You know if that's the only piece of tube gear you own I wouldn't go the bucks for a tester (you can find them for anywhere from around $100-300 on average I'd guess). They are one of the more common and coveted tube-types, and also one of the most counterfitted as they can command a high price on the NOS market. Buy from a reputable seller. At 10,000 hours a pair of tubes is likely to last you 3-5 years of listening say 6-8 hours a day. So if you just make a note to replace them every three years, or when you start hearing the rice crispie dudes inside your rig, you can avoid the cost of a tester. If you want a tester they come up here and on eBay...you may have to get the one you buy calibrated though. I use a BK707 and it serves me well. There are others that do an excellent job, but do make sure they test your tube type(s).

Marco

Thanx for the reply. May I bother you with another question, not about tubes this time? My poweramp is a real class A-device, and runs extremely hot. To the best of my knowledge, this should shorten the lifespan of the transistors (Sanken). I have the opportunity to buy a couple of them, but on the other hand, the amp is working (extremely) fine, so maybe I'm just wasting money, and I know zillions of ways to waste money in ways that will provide me with instant pleasures... Any input (not on instant pleasures though) would be appreciated.

Satch
Tube Pre and Class A ss power amp-I really like that idea .
Keep it simple change the tubes every 2 years,cost on 6922/EC88 minimal.I agree 5000 to 10000 hours life span.Try some different brands,fun to do.NOS is good but beware paying to much.I am using Siemens CCa's in my Pathos Logos,works nicely!
Enjoy
Chris

I'll second the Tube pre and SS amp! (AR LS2B Mk2 and 3 Threshold S-300's!) As far as tubes are concerned, have some fun. Each tube will have a different sound and it is kind of fun fooling around with them. I agree with Marco, find someone with a tube tester or get one for yourself.

You will find the prices will range from low to outrageous. Decide on a budget and start buying some. You can usually recoup most of your cash in the resale market, if you purchase wisely. This will allow you to try many different tubes.

Hop over to AudioAsylum.com and talk with some of the tube guys over there, they can be a real help choosing. Welcome to tubes, it is quite and experience!

Ok guys, thanx for your help. There's nothing deeply philosophical about my set-up though. I changed speakers, but they couldn't get along with my ss-amp, so first I bought this huge class A power-amp, using my old integrated as pre. When funds allowed (or actually, they didn't....) I bought a secondhand pre-amp, which contained tubes, and combined great, so I decided to keep it.
I guess, since there is plenty of life left in the tubes, I first upgrade the interconnect between pre- and power amp, and then I might have some fun with tubes.