Arduinos can count to 6.4MHz so Digital
dial for a NC-40 is a piece of cake.
Resolution to the Hz, accuracy depends on
calibration and temp/voltage variation.
You COULD GPS discipline it for real
accuracy.
73,
Gary
WB6OGD?
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On Nov 5, 2019, at 9:53 PM, Bob Macklin <macklinbob@...> wrote:
?
How about digital tuning accuracy?
?
I have several GOOD HF receivers with analog tuning and they do not have precision readouts. Only good to about 25KHz.
?
There was a digital display for the NorCal Sierra. But I have only seen pictures of it. You could make one of those with ATmega328 and a LCD.
?
Bob Macklin
K5MYJ
Seattle, Wa.
"Real Radios Glow In The Dark"
----- Original Message -----
Sent: Tuesday, November 05, 2019 9:34 PM
Subject: Re: [qrptech] DDS VFO!
And...
Though I don't see the need to add a DDS VFO to a NC-40, my own NC-40 does have an Arduino add-on.
It functions as:
? AFA? audio frequency annunciator (in CW)
? Iambic keyer
? Keyboard CW sender
? CW decoder (displays on computer through USB)
73,
Gary
WB6OGD
