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post #481 of 1496
Quote:
Originally Posted by Oskari View Post

 

How about $85.80 at New Sensor (aka Sovtek)? [http://www.newsensor.com/ProductHighLight.aspx?ProId=198]

eek.gif

I wonder if all those cheap Russian 6AS7G you can still get from the fleebay are just rejects that didn't met certain standard at the factory and that's why many are not impressed by them?

Then you also have the quite well regarded Billington Gold, which are just hand-picked Russian tubes rolleyes.gif

This tube business is really a minefield!

Anyway, I decided to only buy tubes from well regarded sellers with up-to-date digital valve tester.

post #482 of 1496

Even the best tester can't test a tube like an amp does.

 

The behaviour in circuit is the final criterion.

 

Even the latest digital testers don't tell the full story.

I have bought tubes tested on an Amplitrex that developed a problem in circuit very quickly.

post #483 of 1496

Right on, Stavros.  Putnak always says, the best tube tester is the equipment you are going to use it in.  As long it is safe to use, listening to it will tell you more than a tester will.

post #484 of 1496

You might be right but not very practical for most of us. That would involve buying dozens if not hundreds and search for the ones that behave the best? rolleyes.gif

Few companies such as that one:

http://www.watfordvalves.com/aboutus.asp

are likely to be me more reliable than the numerous amateurs on fleebay with testers that predate WWII. wink.gif

post #485 of 1496
Use the tester first to test for leaks and shorts, and then use your amp to determine how good the tube sounds. That's the way, I agree.

You can get winged C 6H13C tubes on eBay NOS, right from Russia, for $25/pair SHIPPED. I'm sure they are generally quite good. I've ordered tubes directly from Russia via eBay on quite a few occasions, with good results,
post #486 of 1496

"the generally quite good" is the part that concerns me. Buying tubes feels a bit too much like playing the lottery those days.biggrin.gif

Sadly, I don't have a tester but I probably would have saved money if I invested in an Amplitrex AT1000 before getting involved with tubes. wink.gif

post #487 of 1496
Quote:
Originally Posted by zenpunk View Post

eek.gif

I wonder if all those cheap Russian 6AS7G you can still get from the fleebay are just rejects that didn't met certain standard at the factory and that's why many are not impressed by them?

 

Not true. They are just old stock, lots of it good old stock.

 

Many are not impressed because of a number of different reasons: taste, hearing, equipment, prejudice, ...

 

Others like them for similar reasons.

post #488 of 1496
Quote:
Originally Posted by zenpunk View Post

You might be right but not very practical for most of us. That would involve buying dozens if not hundreds and search for the ones that behave the best? rolleyes.gif

Few companies such as that one:

http://www.watfordvalves.com/aboutus.asp

are likely to be me more reliable than the numerous amateurs on fleebay with testers that predate WWII. wink.gif

 

Quite opposite.

Some sellers use ordinary testers to ensure the tubes are safe and strong and then amp test them to verify they are fine for audio use.

 

Because a seller uses the latest digital tester doesn't mean you can't trust others as much if not more.


Edited by rosgr63 - 1/6/13 at 10:49am
post #489 of 1496
Quote:
Originally Posted by zenpunk View Post

"the generally quite good" is the part that concerns me. Buying tubes feels a bit too much like playing the lottery those days.biggrin.gif
Sadly, I don't have a tester but I probably would have saved money if I invested in an Amplitrex AT1000 before getting involved with tubes. wink.gif
No doubt about that. It's a roll of the dice every time, especially when you factor in microphonics, emi sensitivities, pin corrosion, etc... E.g. Ive got one JAN 5998 in my stable that produces a random loud "pinging" noise once every few minutes without any apparent cause that I've been able to discern.

For the same reasons, it's all the more satisfying when you manage to land a deal on a particularly good tube!
post #490 of 1496
Quote:
Originally Posted by dminches View Post

Right on, Stavros.  Putnak always says, the best tube tester is the equipment you are going to use it in.  As long it is safe to use, listening to it will tell you more than a tester will.

 

I've learned the hard (Expensive) way!

post #491 of 1496

So... Just a question about availability. I've been searching for some Tung-Sol 5998 tubes and I can't seem to find any at a decent price. Is there any similar sounding tubes to the TS5998s that are reasonably priced and in steady stock? Thanks!

post #492 of 1496
What price are you looking for?
post #493 of 1496
Quote:
Originally Posted by dminches View Post

What price are you looking for?


Well.. I've seen matched pair of TS5998s recently going for 180ish, but also seem them go for more outrageous prices like 350. Honestly my wallet is hurting right now, so I would like to get some good tubes for under 100 for a pair, but I'm not sure if that's wishful thinking or not. Still quite new to the tube world. Thanks!

post #494 of 1496

If you haven't tried the Chatham 6AS7G you might want to start there.

post #495 of 1496

Just saw that LANGREX (UK) has some 5998s up on ebay:

http://www.ebay.com/itm/5998-TUNG-SOL-USA-GRADE-1-/271079372750?pt=UK_Sound_Vision_Valves_Vacuum_Tubes&hash=item3f1d96f7ce

 

I've already got enough for now...

 

-Mark

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