Chris, The CAL S LO and CAL S HI values are as you observed.
Turn the RF Gain to full clockwise, and remove the antenna. Turn the preamp on. Adjust CAL S LO first so there are no bargraph LEDs illuminated. Then tune in an S-9 signal (preamp on or off, your choice), and adjust cal S HI for an S-9 indication in the bargraph. Usually that value will be between 23 and 19.
73, Don W3FPR On 8/27/2018 2:13 PM, Chris Kimball wrote:
Thanks to Martin and Don. Yep, the age setting had mysteriously advanced while in storage. I had forgotten about the CAL submenu. Messing with the settings got me some more reasonable S-meter action. Apparently the S LO should be greater than S HI in normal operation.
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