doordoc posted:
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Time to go back to door school, doordoc.
Yes, the remote is a transmitter, but it does have 1 antennna of some sort,
whether it is obvious or not.
No, the receiver antenna is not subject to ANY FCC regulations. He can muck
with it till hell freezes over and the FCC will not care.
Don
Ok, some of you got me on the definition of an antenna and my lesson
is learned.
{I must have been out sick that day
}
By reading his post I would have to assume that he is referring to an
older transmitter (maybe 20+ years) since I do not see anything on a
newer transmitter that I would think that they would look like three
antennas. Some of the older two-button transmitters did have 3 tuning
coils (1 main coil for the main freq & 1 other separate coil for each
button) & I would guess that is what he was referring to looking like
antennas. So yes the audio coil would be the antenna also, but not a
part that you are going to easily lenghten.
It's not very likely he was referring to a receiver since they do
normally actually have a wire antenna coming off the unit & and it is
highly unlikely his would have three wires hanging off of it, but it
never hurts to ask for clarification.
Yes most newer residential openers have the receiver built-in, but
most of the older residential openers & almost all commercial openers
do not & are outside of the unit. He did not state the age or type of
the unit. Many times we have used one multi-channel receiver (one
receiver with separate relays for up to 4 doors)on garage doors to
eliminate the problem of multi receivers interfering & blocking out
each other, especially on older units. Occassionally we still have to
do it on new openers & disconnect the built in receivers by clipping
resistors to turn them off.
While lengthening the antenna seems to be logical, usually the problem
is not the receiver output strength, but the short range is actually
caused by outside interference. (Satellite dishes, police scanners, &
ham radios for instance)
Therefore making the antenna longer will not solve anything and may
actually make it worse. I have seen people try lengthening them on
numerous occassions & I have never in 25+ years seen where this has
improved the range on a garage door type receiver.
However, as I stated at the beginning of this post I believe that he
is actually planning to alter a transmitter that is controlled by the
FCC.
Doordoc
www.doordoc.com