With 700mv driving a 1mh coil we lose more than half our signal inthe generator drop and we are driving with 4ma. Thus my question, how much drive do we need?
Here I set the reference at +V2 so we can see the drop across R7.
With 10 uh coils the signal is still strong but the current is still 4ma.
Here I cut the drive to 350mv and the output went UP to 45uv with 1 ma in the coils. Notice the transformer. I did not use a trififar winding. the secondary is equal to the primary. The step down transformer provide higher current and reduces the load on the LO.
Here I had lowered the drive and got less loading on the LO with the output holding level.
Another look at the generator lose. the red is the drop across the 50 ohm resistor.
I lowered the drive to 350mv and center tapped the secondary coil at 100uh.I now have 300mv across the coil and 1ma current in the coil. What about the output?
45 uv out.
So it is time to wind a new transformer. If not trifiliar then how?
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