31-12-2022, 07:31 PM
(31-12-2022, 07:09 PM)VK4ADC Wrote: RogerThanks Doug and all understood.
Refer post #3 above for LO level and stage gain determination, however one of the MMICs in each path was replaced by a capacitor on that board layout so use 0dB gain/loss for that stage.
There are better products now-adays (and available) than the SNA586 and because they are all based on 50 ohm in/out, changing to a more modern MMIC in the same package style is as simple as changing the series bias resistor to the output pin of the MMIC.
Have fun. HNY
Doug
HNY
Roger