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Lots of IMD on my Flex-1500

K1FSY
K1FSY Member ✭✭
edited January 2023 in FLEX Series (Legacy) Radios

Hello! I have had this Flex-1500 since it was released. I have recently begun using it again for transverter operations and am finding significant IMD out of the main PA and the XVTR/C jacks into two different transverters during the built-in two-tone test while receiving on another rig and an airspy. Check out this picture below of the flex driving a transverter (28MHz IF, same results with 30MHz IF) into a dummy load, followed by a picture of an icom 706 driving the same transverter with two tones into the mic. Test was performed at ~30% output power from the main PA for this test. I did another test using a 222 transverter and saw similar results when the flex was driving it from the XVTR/C port at 30% (supposedly 0dBm) drive.

image.png

ic-706mk2g into transverter

image.png

Tried same test with a fresh database that pulled calibration data from EEPROM with same results. Any thoughts?

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