Patulous Eustachian tube, echo in the ear (a temporary relief method
that works for me )
L/C Meter IIB ,
a self-calibrating, automatic ranging inductance capacitance meter with 4 digit display,
.001 uHy / .01 pf maximum resolution and 150 mHy/ 1.5 uFd. Range.
Displays Specifications (links to details of each type)
Miniature digital frequency counters designed to display the frequency
of operation of superheterodyne (with an adjustable IF offset) and direct conversion
(without offset) receivers and transmitters. Also can be used as a bench top frequency
counter or built into other test equipment.
DFD1 for single conversion
superhets and direct conversion radios
DFD2 for double conversion
DFD3 ( no longer available )
DFD4 for VHF or UHF radios
or as test equipment to over 2 GHz .
Which DFD should I use with my radio?
AADE Filter Design and Analysis . A FREE Windows
filter design/analysis program. Butterworth, Chebyshev, Elliptic, Bessel, Legendre, Linear
Phase, Coupled Resonator, Crystal Ladder filters. Both Time and Frequency domain analysis. Download FREE . (12 Mbytes)
AADE has an unconditional money back guarantee even on
kits (unless destroyed during assembly).
We have a free "we'll try to fix it if you just can't seem to get it to work"
policy. ($4 return S/H charge)
We offer technical assistance from 9AM to 9PM Pacific time. (usually available on