Certainly,
* Superheterodyne design with diode ring mixers
* IF is 9 Mhz
* LO is produced by a Si5351 (square wave LO)
Block diagram:
ANT -> Ubitx bandpass -> RF amplifier -> DBM -> Crystal filter (4
pole) -> IF amplifier -> DBM -> Near unity gain amplifier (for proper
termination of the mixer) -> Audio amplifier -> Headphones
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On Wed, Jul 3, 2019 at 10:14 AM Michael Maiorana <zfreak@...> wrote:
Can you give us more info about your receiver?
Mike M.
KU4QO
On Wed, Jul 3, 2019 at 9:03 AM Richard Seguin <richard.seguin@...>
wrote:
Good morning,
I have a weird issue that I would like to ask you folks about.
Yesterday, I heard a net that I thought was on 14265 khz. I reached
out to one of the operators because I thought that it was weird that
the particular net wasn't at its usual frequency on 80 meters. It
turns out, I was actually listening to a harmonic and that the net
was on 3735khz. Here is the weird part, it sounded better on 20
meters than 80... I confirmed with a signal generator that the area
that I was tuned is an actual harmonic.
Have any of you homebrewers run into this issue?
Richard (VE1XOR)
