I need some help with the tuned input for 4 811A's. I am using the
National 3/8" red core tunable cores for the L. Fixed values for the C.
I tried to copy what Collins did in the 30L1, not much luck. Using an
MFJ analyzer I tried to tune each band 10-80. Altho on some bands I get
somewhat of a dip, on others it almost shows infinite SWR. I did find
that tuning the 15 meter slug for 10 meters I had a real nice dip and
the bandwith was about 800kc's. If I used the 40 meter slug on 20, I
also had a nice dip with good bandwidth. Any suggestions as to where I
go from here ??? I looked at Ameritrons values and found them somewhat
confusing, as the higher C was on the tube side, not the input side.
Always thought the higher C went to the input side ?? Golly, aint this
fun !!!!
73...Ed W3NR
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