Ham Radio Homebrew Informations: Re: [HamBrewers] stable 7mhz vfo

Tuesday, November 29, 2011

Re: [HamBrewers] stable 7mhz vfo

Dear Kishore,

Pls use AD9833 , a very low cost DDS IC ( Farnell sells for Rs.560=00) and if you donot need a freq. display then any small microcontroller would interface with that IC. Only three lines to be connected, you see. Something like a Rs65=00 IC,16F628 would not only drive the DDS but also can drive a LCD Display! For some details you could visit our Blog:

http://hamrmipl.blogspot.com/ and we have put a picture or two of the experiment.

Suggest running the DDS with 25MHz Cystal clock. And 16F628 can run on its own internal clock,

Sorry for a long over.

73s

dev

--- On Tue, 11/29/11, kishore <kishorev001@yahoo.co.in> wrote:

From: kishore <kishorev001@yahoo.co.in>
Subject: [HamBrewers] stable 7mhz vfo
To: HamBrewers@yahoogroups.com
Date: Tuesday, November 29, 2011, 9:28 PM

hello group,
i have recently joined this group for i have liking for homebrewing. however i have been trying hard to make a 7mhz vfo whose output rf voltage should be more than 0.7 volts.
can any group member help me with such vfo circuits?
73
v kishore
vu2-002swl

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