Re: Car alarm question...


"joe.ker" <joe.ker@xxxxxxxxxxx> wrote in message
news:RQQXe.1833$Az1.980@xxxxxxxxxxx
> That length of wire is tuned to the frequency of the transmitter and
> Clifford says not to extend it. With that being said, I have added 2 foot
> of wire to some Clifford alarms and the range did get better. it will not
> hurt anything to try.
>
> "Matt Ion" <soundy@xxxxxxxxxxxxxxx> wrote in message
> news:d4MXe.525832$s54.42634@xxxxxxxxxxx
>> Since I can't seem to find a rec.alarm.car or anything similar, I'll ask
>> here...
>>
>> I have an old Clifford XL1000 alarm in my car. Range on the remotes
>> sucks green giblets.
>>
>> Since the antenna on the brain is receive-only so I don't have any sort
>> of transmit-impedence-matching to worry about, can I successfully extend
>> this thing with, say, a piece of wire up into the top of the dash, or
>> maybe up the a-pillar into the header, or in some similar way improve the
>> range?
>>
>>
>> ---
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>>
>>
>
>

If I understand antenna design correctly, the antenna should be a quarter
wavelength in length. If you were to extend the antenna, you would need to
extend it in increments of a quarter wavelength. If you don't, then the
antenna is less effective but not ineffective. If the wavelength is equal
to 20 inches, then you would need to make an antenna of 5, 10, 15, 20, etc.
inches in length.

-Bruce


.

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