27-09-2017, 07:49 AM
(This post was last modified: 27-09-2017, 07:50 AM by Old Sparky.)
A quick calculation shows that 1413kHz is 3kHz Higher than 3 x the I.F., which is 470kHz, so it would appear that this radio is picking up the 3rd harmonic of the I.F and this is causing a 3kHz beat frequency. This doesn't happen with any other radios of my acquaintance. Perhaps judicious adjustment of the I.F. to 471kHz will cure this problem!
