Craig,
The simplest, though it takes more effort is to take BITX40, keep adding
more bandpass filters and low pass filters until you get to the band you
want.
i didnt understand the last thing you asked. you probably typed ubitx twice
- f
On Fri, Mar 31, 2017 at 5:54 PM, Craig Wadsworth <cwadsworth@xxxxxxxxxxxx>
wrote:
Ash,
I do not understand RF design well, so this question may sound odd. For a
beginner like me who does not have any kind of oscilloscope, would you
suggest starting by building a Minima with 12 MHz IF and filters as you
describe below, or build a uBitx? I THINK I could build a working uBitx
from your instructions but am less confident of building a uBitx.
Regards,
Craig
w9ctw
On Mar 31, 2017, at 1:54 AM, Ashhar Farhan <farhanbox@xxxxxxxxx> wrote:
"About the Minima, . . . to get rid of the local oscillator spur . . .
There is another better, but of course, more elaborate scheme that you can
try it. It is as follows:
1. Move the IF to 12 MHz. Use band pass filters above 7 MHz for every
band. This will give you a contest grade rig. Add linrad in the backend."
