After reading my last post I can see that my point is not entirely clear. IMO, Naudin's voltage measurents are taken directly at the filament connections on the MAHG tube assembly thus neglecting any voltage drops thru the connecting leads to the supply source.
Jon F -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.323 / Virus Database: 267.8.11/44 - Release Date: 7/8/2005