Quote:
Originally Posted by W3XWT
Hi John... The "bourbon legend" on the 30BP4 is derived from the 15GP22. And, from what I've heard from those blessed (cursed?) to have had to work with such is almost universal based upon being a metal/glass hybrid.
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But the 15GP22 has an additional "weak spots" that the 30BP4 does not have... the welded flange on the 15GP22 appears to be the major source of leaks. IMHO, one of the problems inherent in the metal cone tubes is the limited getter flash area, as the metal cone allows only the use of getters in the neck rather than the funnel. Much less getter flash area is obtained.
jr