There's no particular benefit to an 18-MHz I.F. But 10 MHz can be useful for 
VLF/LF transverters (e.g., 500 kHz) because very high-stability 10-MHz 
oscillators (OCO's, or oven-controlled oscillators, etc.) are available at low 
cost for use as the mixer injection oscillator. This combined with the K3's 
excellent stability can allow the use of extremely narrowband modes that 
require very low drift.

73,
Wayne
N6KR


On Feb 5, 2014, at 12:20 PM, todd ruby <[email protected]> wrote:

> Not being as technically savvy as many here on the reflector, can someone 
> tell me the benefits and theory behind the differences in using these two IF 
> freqs. in the XVTR?
> 
> thanks in advance
> 
> todd
> WB2ZAB
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