[AMPS] Bandpass filters - where to put them?

[Jon Ogden]

>Funny, my replacement 6M filter (from ICE direct) has a label on it which
>clearly states 250 watts ICS. In my book ICS is not intermittent. As for
>playing a game with stating PEP limitations well..................

The 6M filter is rated at 250 W ICS.  I am still trying to figure out 
what their duty cycle really is.

>
>I performed a two minute continous key-down test into a dummy load, and 
>had no
>problems with the replacement unit at ~105 watts. Then a one minute test at
>the highest keyer speed setting sending dits. Although the filter case got a
>little warm, nothing smoked. The old filter  smoked  on the 2nd CW CQ call.

Good.  Sounds like you have a working unit.  One of my 2M filters does 
work and work at 150 W.  I've not gotten it to smoke.  Perhaps they need 
to specify a lower duty cycle.  One minute on and 30 seconds off is a 2/3 
duty cycle.  Perhaps they need to specify it at a 50% duty cycle or less. 

Oh well.....

73,

Jon
KE9NA


-------------------------------------
The Second Amendment is NOT about duck hunting!

Jon Ogden
KE9NA

http://www.qsl.net/ke9na 

"A life lived in fear is a life half lived."


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