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KD1JV Digital Dial
The Digital Dial is primarily intended to be used as a simple means of adding
a digital frequency read out to single band QRP radios. A programmable IF
offset feature allows the counter to measure the VFO frequency but display the
actual operating frequency. The digital dial can also be used as a general
purpose frequency counter. It also includes a special "crystal matching" mode,
which allows the matching of crystals used in IF filters to within 10 Hz of each other.
Each kit was assembled and calibrated per the manufacturer's instructions.
The sensitivity of each assembled digital dial was measured using a calibrated HP 8640B RF Generator and verified with a HP 8660C.
The Chinese Ebay digital dial, sensitivity could not be measured with the equipment used so a pre-amp was added.
Digital Dial Assembly Manual (Current ver B)
Digital Dial Assembly Manual (older ver 1)
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