Yes, the narrower the filter, the narrower will be the PBT range.
Make sure the PBT is centered properly by adjusting L4 on the PBT board
in accordance with the instructions on page 3-13 of the manual.
> My Corsair has the 8 pole (9 mhz) 2.4 crystal I.F. filter (Model 220) plus
> the 1.8,500, 250 TT filters. I was experiencing some muffling of teh signal
> as I went to the narrower filters. I removed them all and cleaned up the
> contacts for the plug in pins anad it made a dramatic difference.
> QUESTION 1:The question however concers the use of the pass band tuning. In
> the 500 and 250 position for CW the range on the PBT control is very limited
> ;11 oclock to 1 oclock positions on the control. Is this normal?
> QUESTION 2:Also is there an optimal method for use of the notch in
> conjunction with PBT or is it just trial and error or just what sounds good?
> Just trying to get the optimal performance out of the rig---Thanks and 73s
> Alan KB7MBI in Woodinville, WA
> FISTS 5702 Proud member of ARRL
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