[Boatanchors] Alignment Question: High Side of Osc. vs Low Side

[Bill Cromwell]

On 06/03/2013 04:21 PM, Mark Johnson wrote:
> Team,
>
> An issue that has always been unclear to me when doing an alignment of a receiver. Some receivers have you adjust the local oscillator frequency to the high side of the incoming signal and some to the low side. Some receivers have you do either depending on the band your aligning. Example I'm checking out a Hallicrafters SX-110 and the oscillator frequency is adjusted to the high side of 3 of the 4 bands and the low side on the 4th band.
>
> I understand the theory but how do I actually know or test for this during the alignment process? That is, if instructed to adjust the oscillator to the high side vs the low side, what do I test for or do to insure I'm on the high side?
>
> Thanks very much.
>
> Mark VE3LU/VE3DJU
>   		 	   		
>

Hi,

Several options. If you have a digital frequency counter then measure 
the VFO frequency. If you have a receiver that can pick up the frequency 
that your VFO should be on (a general coverage receiver probably) then 
listen for it in the other receiver. If you have an LM heterodyne 
frequency meter, use that. If you have absolutely no way to spot/measure 
the operating frequency of your VFO then take it to a friend who does 
have that and when he helps you then buy him a pizza and beer (or other 
treats of his choice). Without the means to identify your VFO frequency 
you're just up the creek without a paddle.

73,

Bill  KU8H