At 7/6/2005 02:35 AM, you wrote:
>Comments mixed into the text below...
>
>Mike WA6ILQ
>
>At 07:58 PM 7/5/05, you wrote:
>
> >Mathew,
> >
> >The Maggiore EV-1 is a very basic, crystal-controlled exciter that has none
> >of the filters, power control, or SWR protection features of commercial
> >units. I have one that I took off the air because of its tendency to
> >produce spurs. It is perhaps not a good idea to use a relatively unstable
> >exciter to feed a 200 watt (!) power amplifier, which itself may not have
> >all of the controls and protections of a commercial amplifier. I've never
> >heard of Vocom, so I don't know where it falls in the quality lineup.
> >
> >I find it interesting that the fundamental frequency of your exciter,
> >12.1175 MHz, when mixed with your output frequency of 145.410 MHz, produces
> >a product at 133.2925 MHz. This product is in the aviation band and could
> >be slope-detected with ease by an AM aircraft radio on a nearby frequency.
> >I'm not suggesting that this is the cause, but it's a coincidence.
>
>Having a look at 157.5275, which is 12.1175 above his output would be
>interesting.
Right; I got my math screwed up somehow & wrote 157.87 in a previous
message, which was incorrect.
BTW, it's too bad they don't let us listen with our HTs on airplanes, as I
could have listened for the spur myself last Sunday flying home from MDW.
Bob NO6B
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