[Boatanchors] Metalized Polyethylene Film

[David C. Hallam]

Right now I don't what I need, if anything.  I assumed poly film would 
not work.  All I know is that my Invader has no output. Voltages and 
drive are OK and the finals show the correct no drive plate current.  
Where the problem lies I don't know.  It will be a couple more days 
before I can start trouble shooting.  I will put my antenna analyzer on 
the output connect to see if the loading circuit is functional.

David
KW4DH

On 1/2/2015 10:31 AM, Brian Harris wrote:
> Johnson specified mica and you have ceramic installed?  Where is/are the cap in the circuit?  If it's a switched loading cap, then it must handle relatively high current because of the 50 Ohm environment.  Disk ceramics don't typically handle high current whereas transmit micas do.  What value/s do you need?  What is the current capacity of the metal poly?
>    
> Brian Harris, WA5UEK
> cell 214-763-5977
> email cosmophone at yahoo.com
>
> --------------------------------------------
> On Fri, 1/2/15, David C. Hallam <dhallam at knology.net> wrote:
>
>   Subject: [Boatanchors] Metalized Polyethylene Film
>   To: boatanchors at mailman.qth.net
>   Date: Friday, January 2, 2015, 9:13 AM
>   
>   Are high voltage metalized
>   polyethylene film a substitute for disk
>   ceramic capacitors in the output network of a Invader 2000
>   (pair of
>   4-400A)?  Johnson call for 2500V mica.  I haven't
>   looked through my box
>   full of old mica yet to see if I have any of the correct
>   values.  Is
>   there a source for HV mica?
>   
>   David
>   KW4DH
>   
>   --
>   There are two possible outcomes: if the result confirms the
>   hypothesis, then you've made a measurement.
>   If the result is contrary to the hypothesis, then you've
>   made a discovery.
>   Enrico Fermi
>   
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-- 
There are two possible outcomes: if the result confirms the hypothesis, then you've made a measurement.
If the result is contrary to the hypothesis, then you've made a discovery.
Enrico Fermi