[AMPS] AL1200

[km1h@juno.com (km1h@juno.com)]

Mark and Peter...tnx for the info but meeting FCC specs was never one of
the reasons given to me.
Interpeting FCC specs has been a sore point with several manufacturers
since a lot of interpetation latitude is given to local jurisdiction
offices. Ameritron can disable 10M with a 30 second to cut green
wire....others have to jump thru hoops to get approval.

Maybe Im missing something but I fail to see any difference in the
ability to attenuate harmonics on 160/80 than 40/20 or other bands. Alpha
and B&W at least used the Pi-L on all bands and pushed the harmonic
attenuation feature....on the higher bands which tend to annoy TV sets.

I was told at one point it was to save on variable capacitor cost; later
it was called efficiency. ( Different Ameritron engineers over a period
of time from Toledo to the MFJ Mississsippi swamp pits)  With the cost of
an extra switch wafer in todays market I wonder....?   Perhaps it is all
the above....the Q is so poor on the lower bands they had to add a L
section to compensate for harmonics.....???  Comments??

73   Carl   KM1H




On Wed, 23 Sep 1998 15:47:16 EDT wb8jkr@juno.com writes:
>  Carl,  would it be possible that a Pi-L is used
>because of the closer frequency spacing of
>the 160-80 meter bands they thought the
>better harmonic attenuation would be advantageous?
>
>Mark  WB8JKR
>
>
>>I guess I'm an old fashioned type Bill. Never been on RTTY and pbly 
>>never
>>will so I just tend to ignore the mode! I never could get a straight 
>>answer why Ameritron uses a Pi-L on 80-160M. One "expert" claimed it 
>>was to improve efficiency. If so he neglected to
>>transfer that new found efficiency out to the load.
>>Glad to hear about the 91b...I hear praises also but have only been
>>inside one once.
>>
>>73  Carl   KM1H  
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