On Sep 25, 2006, at 10:15 AM, pentalab wrote:
--- In ham_amplifiers@..., R L Measures <r@...> wrote:
### No I have not. 1 e-mail to eimac ought end the
discussion . Rauch claims amperex etc... all use
zirconium coated anodes... and gettering is done when tubes
show colour... aprx 800 deg C. I'm inclined to agree.
Rich sez So how can a 3-500 be gettered by running the filament
only?
###### It can't !! 3-500'z don't have any internal filament
heat activated getter's....end of story.
So operating the filament of a new one for 48-hrs does nothing to getter the tube?
### Later... Jim VE7RF
A 3-500Z
has no internal getter........ so it's either the tube has
zirconium on the anode..... or it has NO getter at all !
Jim VE7RF
Yahoo! Groups Links
R L MEASURES, AG6K. 805-386-3734
r@...
