Xtal filters?
ISTR that in the early 1970s, that to buy an Xtal filter could cost you
half of a week's take-home pay, but now, with the component
supplers selling Xtals for a few pence, the ladder filter is well
within the sights of any and everybody.
No excuse now not to build your HF SSB / CW rig for ooo £100!
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