Re: AD9850 instead of Raduino
|
What freq should I be sending to the Bitx40 board....enough so 12mHz becomes 7.08-7.20 after subtraction? (4.92-ish?). Not getting signals. Just solid tones every now and then as
I tune the AD9850.
toggle quoted message
Show quoted text
From: Billy Shepherd
Sent: Friday, April 07, 2017 4:03 PM
To: '[email protected]'
Subject: RE: [BITX20] AD9850 instead of Raduino
Okay thank you!
?
From: [email protected] [mailto:[email protected]]
On Behalf Of Ben Kuhn
Sent: Friday, April 07, 2017 3:49 PM
To: [email protected]
Subject: Re: [BITX20] AD9850 instead of Raduino
?
Yes, it's ignored.? I actually have a pre-raduino and post-raduino version and this is the only difference I could spot.? I'm using a 10-turn pot connected to the Arduino to tune similar to the raduino supplied with the later kits.
?
On Fri, Apr 7, 2017 at 2:44 PM, Billy Shepherd <billy.shepherd@...>
wrote:
Would you think the whole circuit behind C93 and L4 is ignored? Also, did you not remove the tuning pot? Do you use the rotary encoder to tune?
?
From:
[email protected] [mailto:[email protected]]
On Behalf Of Ben Kuhn
Sent: Friday, April 07, 2017 3:41 PM
To:
[email protected]
Subject: Re: [BITX20] AD9850 instead of Raduino
?
I removed C93 and L4.? Works perfectly.
?
On Fri, Apr 7, 2017 at 2:28 PM, Billy Shepherd <billy.shepherd@...>
wrote:
I purchased my Bitx40 last December. Everything works great. I’m trying to use items I already own to build a DDS. I connected a AD9850 with an Arduino Mega 2560. I added a contrast control, an LCD display and a rotary encoder.
I used the sketch found here:
http://www.ad7c.com/projects/ad9850-dds-vfo/
The DDS works. I connected my DDS to the DDS pins on the Bitx40 near L4.
What changes do I need to make with the pre-Raduino Bitx40 to use a DDS? Remove L4? Keep or change caps in original VFO?
?
Thanks in advance,
Billy
?
?
?
?
?
|
