"andreas magun" wrote in message
...
Leon Heller wrote:
"andreas magun" wrote in message
Thanks for your reply,

I have checked the output power (voltage) from my quadrature driver with
a 50 Ohm load. The output voltage dropped by a factor 2,
indicating a good match. The same happened when I attached the
mixers (SBL-1) instead. I assumed that the LO-input resistance of an SBL-1
at 7 MHz is close to 50 Ohm and purely resistive.

Diode mixers make a real mess of the input LO signal, if you look at what
happens to it with a 'scope. They have to be fed from a 50 ohm resistive
source, but they are not really resistive themselves.

Leon