Welcome to Almost All Digital Electronics

(HAMPEDIA)

Encyclopedia of Amateur Radio Equipment

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Digital Frequency
Displays
Filter Design
and Analysis

L/C Meter IIB

DFD1 for single conversion superhets or direct conversion radios (All DFD's have adjustable IF offset)
DFD2 for crystal controlled converter in front of tunable IF (requires HFO, VFO and BFO signals brought out of radio)
DFD3 a universal programmable module with EEPROM storage. Similar application to DFD2 + much more..
DFD4 with built in prescaler usable to 3GHz. Can be configured as a low-cost bench top counter from DC to 3GHz.
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