Thanks BrianB,
I still feel myself, it is still a bit ugly :-( but works great :-)
That would be great if you do a VTTC. Kind of lonely here currently in this
realm... :-D
They are my favorite. I also just love the glow of a glass vacuum tube. And
"seeing" the friction of the electrons "hitting" the plate. And speaking of
"seeing", these 304's are unlike any tube that I have ever run before when
it comes to this...there are some really neat "patterns" that can be seen...
Now my next one waiting for Spring does look nice and I hope it stays that
way...
Back to the working great part... I have gotten around to rolling all my
304 tubes on this improved setup yesterday (12/24). Ran each tube for just
a "quick" tuning for best streamer length, wrote down results, and then I
just "played" around with each tube trying different rates and changing
tuning settings. Spent from 3pm to 8:30pm rolling. Downtime switching tubes
was about 5 minutes each. Otherwise running non-stop. MOT handled this just
fine, only getting slightly hot at times, but cooled quickly on lower rates
and during tube switching. No more the scalding hot just touching it for a
split second checking it!!! The last time I did tube rolling on several
tubes, I had to let the MOT really cool down after each short run. Took
really long, for not really much true run time.
So here I will just list the results now:
Again this is just 10A variac using the 120V setting. And no PF caps, not
going to bother.
Eimac 304's
TL#1 got 31"@14.5A
This one is still the "swords" tube, easily tuned in for this. And I can
now also tune for some other strange behavior. Still the only tube that I
can get perfect swords just one after another. Going to scope several
things on this tube when I get a chance, take pictures and notes and then
scope a "regular" tube and compare. I will admit I am still puzzled by this
one tube. Only one like it.
TL#2 got 32"@12A
TL#3 got 34"@14A
TL#4 got 33"@14A
TL#5 got 34"@12.5A
TL#6 got 33"@12A
TL#7 got 31"@12A
TL#8 got 34"@13A
T?#1 got 33"@14A
The reason for the question mark is the tube markings are completely gone,
not sure if a TL or TH.
TH#1 got 33"@13.5A
TH#2 got 33"@11.5A
TH#3 got 32"@13A
TH#4 got 33"@12.5A
Very pleased with these results and the efficiency here. Going to pick a
couple and do some really thorough experimenting and tuning when I get a
chance.
So this is all for now... Happy Holidays everyone...
Chris Reeland
Ladd Illinois USA
Sent from my LG V20
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