On Sat, 20 Jun 1998 02:23:06 GMT, antis...@here.not (john r
pierce) wrote:If you're seeing something on Channel 11, it's not coming from
>je...@comix.santa-cruz.ca.us (Jeff Liebermann) wrote:
>Actually, I was getting a signal on 11 last night, but its pretty cruddy now. I
>believe they rigged up a temporary xmitter, or I'm picking up their Monterey
>repeater or something?
Loma Prieta. I can see Loma out my window and there's nothing on
>Hey, Jeff... RF-man!That's ARF, as in woof, bow-wow, arf and howl.
>question for ya... Have you seen this hightech powered TVRadio Shack and high tech in the same sentence? Surely an
>antenna that Radio Shack sells which looks like a large dipole
oxymoron at best. I'm still downloading the 844KB PDF file at
500 bytes/sec (Metricom at its worst). It should be done
>(about 6' longI built something like that about 1977 BC (Before Cable). The
>end to end, basically a flattened 2" wide tube or so), it has some sort of
>active amplifier, you mount it on the side of your house up under the eaves, its
>nearly omnidirectional (ok, a major dip colinear with the arms, duh!) ? I've
>heard from several folks that these work great, pull in signals folks didn't
>know they could get. It comes with a RF mixer/seperator so you can put it on
>the LNB RG6 cable that comes down from a satellite minidish, then pull out the
>VHF/UHF seperataly from the sat dish signal. They sell for about $100.
new MMIC (Mini Microwave Integrated Circuits) and low noise
GaAsFET's make it much easier. The basic idea is to put the RF
amplifier as close to the antenna as possible. Any kind of
antenna will do as there is no sane way to build a broadband
horizontally polarized antenna that will work from 54 to 800MHz
and still have reasonable pattern, gain and VSWR. Therefore, you
start with a convenient length of wire, characterize it to the
last decimal point, and spend a few zillion clock cycles
calculating a matching network. It actually turns out to be
rather a rather simple design. You then mix the signal with your
satellite feed (hint: off the air tv is 54->800Mhz, satellite
block downlconvert is 950-1450Mhz, so there's room).
However, placing it at a random location is guaranteed to screw
What bugs me is the claim that it will "pull in signals folks
There's nothing inherent in this scheme that provides any level
If I had to recommend an antenna, it would be a reflector backed
Still downloading the PDF file. Maybe tomorrow.
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