Dear AMSAT, Has anyone successfully increased the maximum FM deviation of the 910H when using the 9600 setting on the radio? We have not been able to. We have two units, and one is maxed at 2.5 KHz and the other at 3.2 KHz deviation.
We've used the service manual to adjust the deviation to max higher values (>7KHz). But, this doesn't affect the 9600 input path. Looking through the service manual, on page 10-1 lower left corner, it shows that the gain control we just set doesn't affect the 9600 path. So, I'm thinking of modifying the over modulation detection circuitry to allow for a larger peak to peak voltage signal to be input. The components that see that voltage appear to be able to handle it. Has anyone tried this, or know of another way to increase the deviation? 73, --James _______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
