Could be the image frequency - of the first I F.  Not uncommon an occurence
and particularly with a lower priced receiver could be a problem.  Plus
what Colin already said.
Pat ByrneAt 09:52 PM 3/16/2005 -0700, you wrote:
>hey jeff:
>are you sure these repeaters are actually on the frs frequencies, or is it
>the FRS radios you have picking up intermod....these hand held FRS/GMRS have
>a tendancy to have extremely sensative receivers which plays havoc with
>strong signals on nearby frequencies.
>I will give an example:
>With my midland model XXX FRS/GMRS hybrid handhelds, on FRS channel 10, i
>very clearly can receive the local regional school bus repeater which
>happens to be located in the 424MHZ area.  This is not because i am even
>close to the repeater site either, i can pick up this signal on FRS channel
>10 all over a 15-20 mile radius. However, on my bc245XLT and another
>programmable 400MHZ handheld i have, i do not pick this signal up unless i
>program to the actual frequency.
>This leads me to believe that these cheaply manufactured FRS/GMRS radios,
>though they are required to meet certain technical standards, have a big
>problem with adjasent frequency intermod on receive.
>Since i doubt as big a place a detroit would over look a camercial business
>system on the same freqs as FRS/GMRS, i would lean towards an intermod type
>problem.
>If you have a scanner, punch in the FRS/GMRS frequencies and monitor for a
>while to see if you still pick up those ltr/conventional repeaters.
>Another way to check if its intermod is to go to the frequency or
>frequencies you hear the repeaters on with the frs/gmrs handheld, and enter
>a ctcss tone, or what the industry has simplified to a "privacy code" and
>see if it goes away, if so, then it is truely a repeater on that freq, if it
>stays, then i would say its intermod.
>If you do multiple tests and find that at the end of it all the frequencys
>are truely being used by local camercial companies,, inform the FCC and make
>a formal complaint....there are allot of GMRS pirate operators, meaning, a
>company using a GMRS repeater that some less then reputable operator has
>rented to them for monitory gain with no regard for the law.
>GMRS, due to its nature is much like 11 meters, there are rules and regs,
>and many people who are technically aware and follow the regs, and then
>there are those who get away with pretty much every single infraction of the
>laws and regulations governing the band and go unchecked...
>GMRS repeater owning goes even further, because repeaters are not
>specifically well used or at least very popular in all places, a person can
>set one up fairly cheap and rent it out to a company who doesn't care or who
>doesn't know about communications regulations and make a bit of cash on the
>side.
>Regards
>Colin
>
>----- Original Message -----
>From: "Jeff Kenyon" <[log in to unmask]>
>To: <[log in to unmask]>
>Sent: Wednesday, March 16, 2005 8:07 PM
>Subject: FRS and GMRS freqs and other users being heard on them
>
>
> > Good evening everyone.  I have been using my FRS radios that I haven't
>used
> > for a long time, and haven't had much chance to monitor that band much
> > either as I have been really busy, and I've noticed that at least here in
> > the Detroit area there are other users in addition to FRS users, and one
>is
> > an LTR trunked system and other users.  Has anyone else noticed this?
>I've
> > heard both conventional repeaters and an LTR system in my area.
> >