[AMPS] Re: 3-600Z

[Rich Measures]

>
>Rich AG6K wrote:
>> The idea that a tube with a fixed emissive limit can be 
>> "upgraded" to provide an "advantage" by upping the anode
>> dissipation rating is hipe
>
>Do you think that when the manufacturer has upped anode dissipation,
>we could increase anode volts and get more Po for same Ia?
>
probably not.  The 3-400z and the 3-500z have a 4000v rating.

>At least we can pray that grid/filament shorts are designed out
>of the new Svetlana tube!
>
The filament-grid shorting problem is primarily not due to a design 
defect in the 3-400z and 3-500z, rather it is due to failure to 
satisfactorily reduce vhf gain at the anode-resonance.  On the other 
hand, the incidence of filament-grid shorts could probably be reduced if 
a means of supporting the midpoints of the filament helices was 
incorporated in the design.  

-  later, Martin


Rich...

R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures  


--
FAQ on WWW:               http://www.contesting.com/ampfaq.html
Submissions:              amps@contesting.com
Administrative requests:  amps-REQUEST@contesting.com
Problems:                 owner-amps@contesting.com
Search:                   http://www.contesting.com/km9p/search.htm