DDS VFO with AD9850 / AD9851 and PIC16F877A

[vu3wij]

Hello Gaetano,

Please confirm whether you used the DDS VFO with BITEX20 v3.
Please give the the reports regarding the audio with and without DDS VFO.

I had BITEX 20 ckt with me(an old version) But have not tried.

SHAJI
VU3WIJ

[iz1neo]

sorry for delay due to account expiry.
the dds with the bitx version3 work great , but you put the modification near condenser of sound amplifier (100microH).
i think because the signal level of dds is greater than vfo (with my scope and on my bitx) and a small rf go in the sound amplifier

bye my friend

[yo5ofj]

[radiopatel]

Hello Shaji

Can I get fully assembled DDS VFO with cabinet.

Dinesh Patel - VU2DCI

[vu3kgl]

HI ALL

I WANT TO KNOW THAT "CAN I USE 20MHZ CRYSTAL OSC. IN DDS VFO IF I USE AD9851?"

AS PER INFORMATION 1/3RD OF THE SYSTEM CLOCK WILL BE THE O/P FREQUENCY OF DDS AND SYSTEM CLOCK IN CASE OF AD9851 WILL BE 6*XTAL OSC. SO THE SYSTEM CLOCK WILL BE 120MHZ MAXIMUM O/P FREQUENCY WILL BE 40 MHZ

KINDLY HELP ME.

WITH 73'S
DE VU3KGL
KUMAR GAUTAM

[radiopatel]

Dear OM Shaji

Please reply to query og VU3KGL. I also have similar query.
PLease keep posting updates.
Your project of DDS VFO is excellent keep replying so that it grows far and wide.

I am also waiting for kit/PCB

Regards

Dinesh VU2DCI

[zapper]

Dear Shaji,

Do you still have the complete kits available. I would like to have a set, either in ready to assemble form or assembled.

I am located in Cochin.

Regards

Zapper

[vu3wij]

Hi,
"I WANT TO KNOW THAT "CAN I USE 20MHZ CRYSTAL OSC. IN DDS VFO IF I USE AD9851"


Yes, You can, and AD9851 DDS Will give you 40MHz.
In my DDS, the system settings are software locked.
You cannot make a wrong entry. DDS will allow you the possible positive entries only, so that the AD9851 will be safe always...

Please send me an email for details of VFO and PCB and kit availability.

SHAJI