Re: W8TEE Display/VFO- USB - CODING REQUEST
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We use an AD9850 and it's been used as a straight VFO 160-10M in the Arduino Projects book, so I think it would work fine.
What I suggested does not involve any hardware at all. Simply a new state added to the already-exiting state machine. All it would take is a press on the rotary encoder switch to move to the Digital mode and another press to lock it in.?
Jack, W8TEE
From: Jerry Gaffke via Groups.Io <jgaffke@...>
To: [email protected]
Sent: Wednesday, August 9, 2017 11:07 PM
Subject: Re: [BITX20] W8TEE Display/VFO- USB - CODING REQUEST
Allard's solution makes it easier on the user, no need to switch in and out some BFO inductor when flipping between LSB and USB. But Allard's solution requires a VFO that can operate at either 5mhz or 19mhz. I have no idea if your DDS chip can send out a clean 19mhz, and no idea what kind of analog filter follows the DDS chip. Jerry On Wed, Aug 9, 2017 at 07:52 pm, Jack Purdum wrote:
Changing the BFO frequency involves little more than changing the BFOFREQUENCY symbolic constant
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