Re: Channel Vision LPF-600 Doesn't do what it's supposed to...

["BruceR" <razrbruce@xxxxxxxxxxxxxxx>]

95-99 are a different band (actually the commercial FM band!) so you're
probably out of luck there.  I bought some older commercial modulators
that were most likely removed from hotels and they are of high enough
quality to use adjacent channels without interfering with one another by
the use of SAW filters. If you're using these for security cams as I am
they're fine but they won't provide stereo audio. As for channel
filters, always assume one unusable at each end - sort of like
bookends - to the clean channels.  I had my filters custom made, which
you'll find isn't unusual, by Tin Lee Electronics, Ltd. (www.tinlee.com)
and their site has lots of good info including a frequency chart showing
which channels are where in the spectrum.  Your 95-99 problem will be
apparent when you look at the charts.  Filters aren't cheap.  I think I
paid about $300 for a 3 channel unit about 5 years ago.  The modulators
are much cheaper and can be found on ebay. I have some extra ones that I
can sell as well.

 Roveer wrote:
> I've been modulating channels on my home system for years.  I've been
> using a Channel Plus 3445 (4 channel modulator) and a filter that
> filters out 75-80.  Problem is that with 2 channel separation I can't
> input all 4 channels off of my CP3445.  This hasen't been a problem
> until just recently when I added the 4th device.  I used to modulate
> on channels 75-77 and 79.  Put something on 81 and it's all fuzzy.
>
> So I bought a Channel Vision LPF-600 which is supposed to block 86 and
> above.  The part I missed was at the bottom of the description it says
> it won't block 95-99 on cable systems.  Seems misleading when it says
> at the top of the description that it blocks >86.
>
> Another problem is that 88 & 90 when assigned to the modulator are
> fuzzy.  I don't get a clear picture untill 92, but by the time I go to
> 92 then I run into the upper end (95-99) which it also doesn't block.
> Defeats the whole purpose of why I bought it.  I put it in series with
> my other filter, kept 3 of my channels at 75, 77 & 79 and put the 4th
> channel at 92 and everything is clear.  Only problem is that my cable
> company uses channel 79 for a channel I really want and have been
> missing for years.
>
> Why isn't the LPF-600 block above 86 like it's supposed to???  Picture
> isn't clear until you get to 92, then there is not enough open
> channels before I run into unfiltered territory again.  Aggrivating!!!
>
> Thanks,
>
> Roveer