KB 402

[Terry]

Mike, your idea is a sound one, but it is easy to mix positive and negative if you're not careful, so lets take it in stages:

First find the frequency corresponding to 1600m:

300,000/1,600= 187.5 kHz

Now calculate LO frequency for R4/198kHz and 120kHz IF:

198 + 120 = 318 kHz

Now subtract the 'new' 130kHz IF to find the new signal frequency:

318 - 130 = 188 kHz

That's good enough for me!