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|Name:||Dale R. Parfitt|
|Heading:||F.S. N3ZI VFO FOR DRAKE TR-7|
|Ad Message:||I have just bought a Drake RV-75 VFO and so am selling my N3ZI DDS VFO for the TR-7. It is built to look like a piece of 7 line gear. From the front panel one can enable RIT and choose between 10Hz and 100Hz tuning steps. A toggle switch on the rear apron turns the DDS on and off. When OFF, VFO control returns to the TR-7.The blue digital display reads from 0 to 500 KHz. So on 80M and 28.5MHz one adds 500KHz. So 3750 would read 250 on the display. All other bands read normally. Typical of many rigs of the day- like the Drake 4 line. 1KHz tuning steps are treated in the manual: https://www.pongrance.com/dds-2016Vmanual.pdf
In addition to the DDS there is a 2N5109 amplifier used to lift the DDS output up to the level required by the TR-7.
While not installed, the cabinet and rear apron is drilled for a Yack keyer:
More pix available.
$250 includes UPS. PayPal/check/money order. Dale W4OP
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