On Tue, 11 Apr 2006 17:35:11 +0000 (UTC), Phil proves he has no class
wrote:

: Phil Allison wrote:
... and we're surprised he can write...

: Blow off Phil,
: Wasn't indicated in the first post I replied to.

: ** READ the WHOLE damn thread before replying,

Who gave yout the power to make usenet rules?
No, I clearly indicated my reply post was directed at
the first post. As you often say... "****-off" Phil!

: ** Bull****.
: The voltages experienced are within the spec for any
: decent EL34 or 6L6GC.

And those "decent" el-34 - 6L6GC tube data sheet/specs are where?

: ** Any good data book

Yeah, I figured you'd dodge the question with an incomplete answer.

How about an actual mfgrs 6L6GC data sheet? Even a newer production
el-34 or 6l6gc tube?

http://www.drtube.com/tubedata.htm#BPTetrodes

Notice the much lower typical dc plate voltage. Nothing in the
data books and or manuals you might find seems to indicate reliable
operation at the typical Music Man Guitar Amplifier Anode/plate
voltages.

Got any real tube data sheets to provide a web link or actual
reference to or are you just full of angry **** all at the
time Phill? Yeah you're gonna dodge the question and not come
up with any tube data sheet with specified operation at the
higher Music Man plate voltages.

: : Testing tubes for breakdown at higher anode voltages
: : is called high-pot testing.
:
: : ** Bull****.
:
: I guess you know more than most people regarding high pot testing
: of tubes and parts as described in the locations given below:
:
: http://www.somis.org/BVT.html
: www.w8ji.com/572b_problems.htm
: www.cpii.com/EIMAC/PDF/mkt039.pdf

: ** ROTFL !
: What a load of crapology.

What about testing tubes with a high pot is crap Phil? You just
plug tubes in amplifiers without pretesting them...

: Not one is even faintly related to EL34s or 6L6GCs being used
: in a MM amp.
: "Skipp " is a DISGUSTING BLOODY LIAR
: ...... Phil

Yeah, I figured you dodge the facts.

We'll be waiting to see if you can find an EL-34 or 6L6GC data sheet
or manual, which provides a manufactures spec for operation above...
say even 650 volts.

Got even a single page/paper or data sheet available on the web Phil.

I figure you'll choke and give some angry ****-off excuse why you
won't provide it when you won't be able to find one.

"the most tender nerve is behind the bulls horns" You appear to
have more than your fair share of denial (bull).
s.



Look at it from an engineering perspective Skipp.

High potting in the commercial / manufacturing environment is
typically used for design and compliance *verification* and not pass /
fail *testing*. Obviously, high-potting may find use in some testing
situations, but if you use it for pass/fail testing, then what does
that say about your design ability?

The max rating for a 6L6GC is 500V. If you use it beyond that rating,
then high-pot testing is used to support your poor engineering
decision to use a device beyond it's rated specs to begin with.

The EL34 has an 800V max rating. If you can't trust it to 800V without
further testing, then why use it?

Typical usage parameters and operation are just that, typical. Some
folks use a general rule of thumb that cut-off usage of a device at
80% of it's max rating.

No offense, as I see were you are coming from and what you feel you
need to do from the testing perspective. But I'd have to agree with
Phil, what you are doing with high-potting is just plain wrong from an
engineering perspective.

If any tube does not perform to it's published specs, then don't use
it. I don't care if it was manufactured 60 years ago or yesterday. A
6L6 or EL34 should perform to its published specs, even if those specs
come off a datasheet that is older than your grandmother, otherwise it
is not a 6L6GC, EL34 or it is simply junk. That's the point Phil is
making.

To add high-pot testing on the rear end of manufacturing is an
additional costly layer that most modern manufacturers will not
tolerate. Again, you guarantee performance by *design* (high-potting
or compliance testing on the front end), you do not guarantee
performance by *test* on the rear end. Otherwise you end up throwing
product in the trash when they don't test to specs. Sample testing on
the rear end is one thing, but if your in the latter position,
guarantee performance by test on every device. then you fire all the
engineers and find someone the can design something to work properly
to begin with. And if you use something at near or above it's
published specs, then that's perhaps bad decision making on the
engineers part and you'll have to live with the fragile house of cards
that you've constructed as you're doing now...

Cheers!