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Title: Hallicrafters SX-62/42 Local Oscillator Post by: AB3FL on January 15, 2013, 10:54:58 PM I am working on my SX-62A and trying to figure out where the LO should be. Bands 1,2, and 3 seem to work fine with it above the indicated frequency. I cannot get Band 4(15-32MC) to work with it on the high side, but it works fine with it on the low side. Bands 5 and 6 (FM) are working with it on the high side. Two questions:
1) Where should the LO be on bands 1-4 2) Is there any harm of loss of sensitivity if I make bands 1-4 all on the low side? I am hoping that option 2 will work thanks Tom - AB3FL Title: Re: Hallicrafters SX-62/42 Local Oscillator Post by: WQ9E on January 16, 2013, 08:31:23 AM Tom,
Band 4 should be low side injection, others are high. Tracking and calibration will not hold across the band if you try low side tracking on bands 1 to 3 and you wouldn't even be able to get the oscillator to go low side on the lower end of band 1 without a lot of added capacitance or inductance. Rodger Title: Re: Hallicrafters SX-62/42 Local Oscillator Post by: AB3FL on January 16, 2013, 08:52:17 AM Great. I did it correct then AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
thanks Tom - AB3FL |