29927Re: [midatlanticretro] Altair / Fool on the Hill question
- Mar 28, 2013On 03/28/2013 11:37 PM, Kyle Owen wrote:
> > You all know about the famous "Fool on the Hill" demo. Bill Deg. demo'd itIt takes a lot less than that. Older micros with poor shielding and
> > a couple of VCF Easts ago.
> > InfoAge, at this year's Philadelphia Science Festival (April 20), is doing
> > a "how radio works" theme. It was suggested that maybe MARCH could
> > participate by doing the Altair demo several times during the day.
> > I like that idea! But I wonder: with a bunch of radio gear operating in
> > very close proximity, will the demo still work, or will there be too much
> > interference for it to operate correctly?
> It's not at all likely that the radio stuff will interfere with the Altair.
> It is likely, however, that the Altair will interfere with the radio stuff,
> especially if the radio stuff is below 30MHz or so.
> Nah, only if you put a big 'ole Yagi on it! :)
single-digit-MHz clocks still have signals with fast edge transitions, with
strong harmonic content well up into the tens of MHz.
> Hey, at least it doesn't haveYep. Yech. :-(
> a switching supply built in. Those are the worst! The university's ham club
> shack is almost unusable since the whole building is generating an untold
> amount of RF noise from all of the computers.
Dave McGuire, AK4HZ
New Kensington, PA
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