el34 test data ...... good?

Without knowing exactly what the test conditions were, those numbers are completely meaningless except to know how well-matched the tubes are - which those do appear to be... less than 2% spread on plate current and less than 3% on transconductance - and even then you can't be sure they're more than a rough guide.

They're measured at a particular combination of plate voltage and bias voltage - which might be completely different from what you're going to use. If you're not buying from a reputable tube reseller who will guarantee matching under guitar-amp conditions, any figures like that (especially obtained with a 'tube tester', which don't run the tubes at anything like the voltages in a guitar amp) are just numbers, and I wouldn't base a buying decision on them alone.

 

That's at least a guitar-amp voltage (a little low, most 4-tube amps operate in the 450-500V range) and the figures do sound OK at that.

Still very hard to tell if they're new or not - is the seller claiming they are?

 

You can't tell if the tubes are new from the data.

It may not matter anyway... old-production tubes often test better than both the spec and new-production tubes - which they will outperform and outlast in many cases, even when they're quite used.

It comes down to whether you trust the seller's description and pricing. Personally I use used old tubes exclusively (I get them cheap and test them myself in real amp circuits) and don't worry about test data as long as they work well. I've had a grand total of one fail in a gig situation in fifteen years ... although I've thrown out a large number that weren't good enough to use in the first place.

I'd be very wary of buying tubes from any source other than a reputable tube dealer, BTW - certainly when any claims are being made about their condition.

 

They last longer and are much tighter in spec to the original design parameters because quality was higher at every single stage of production - back then, tubes were used in critical applications such as military and aircraft systems, and were made in much larger numbers in American and European factories where quality was more important overall than cost; factory testing was thorough too.

Now, they're made as cheaply as possible in Eastern Europe and China, for a non-critical fringe market, and the economics mean they have to get away with passing as many as they can. There simply isn't the quality control built in at every stage - if you haven't seen some pics of some examples of Chinese-made tubes you'd probably be shocked at how badly-made they can be.

Unless you can afford to buy a lot and take your chances (many sold on the web are not as 'new' as they're supposed to be, and many may also be ones that didn't quite make the grade back-then too - they were far better, but still not perfect, and many were still rejected after manufacture, some of which probably got out into the market), you're best going to a respected NOS reseller, such as Lord Valve or KCA NOS Tubes (Mike of KCA posts here as 'Blue Strat').

 

Not much chance of Western Electric making guitar amp tubes unless people are suddenly willing to pay $100+ per tube.

The only tube they're not making (actually, the company is/was called Westrex I believe) is the 300B, a high end audio tube which sells in the $300+ (probably higher by now) range.

 

They were. However the inside scoop was then when Westrex bought the WE name they also bought the Kansas City works plant.

That said, they also got all the tooling, WIP inventory,
ALONG WITH All the original WE 300B tubes that magically
appeared in a ware house or two. From what I recall, though they had to move the plant to Arkansas, for
some reason.

I worked with some of these WE folks at Dallas Works.
That was before TYCO bought them, stole the pensions,
and shut down the only American Plant to win
the Deming Award for Quality. They had excess
capacity in China. OH and some of the Tyco guys
are getting 25 years in the big house.

Like anything that was made from Western Electric,
it was made to LAST and NOT break nor wear out;
if it did, the compnay lost money. Either on a
house call, business call etc.

Now things are so cheap if it breaks, just buy a new one.

Of course, that assumes unlimted resources. Once the
oil is gone, plastics prices will soar again. We'll probably
get back to making things last again.

Give it a few decades or centuries....your guess is as
good as mine.