I have an old Millin grid dip meter , with six plug in coils
have coils for 1.7 to 150 mhz , last coil 150 to 230 is missing.
meter gives an indication when it is turned on . otherwise dont know if it
works , but it is a very basic ckt.
have manual, has scratches and mars
these were the best to this day
will sell for $ 40.00 shiped to ur door (upper 48 states)
de W9cin "Rich"