[NLRS] Deafness on 6M

[jcplatt1@mmm.com]

Thanks Phil, these were the filters that I was trying to think of.   I'=
ve
used the 2m ICE filter before.   As I recall, these are circuit L/C
sections, so the bandpass performance is not on par with a cavity like
those made by DCI.   On the other hand, the price ($35) is much more
attractive than the custom 6m cavity from DCI (is it $235 ?) and it may=
 be
adequate.   I would suggest the narrow band (50.0 to 50.5) Model 412 ra=
ther
than the wide band (50.0 to 54.0) Model 412W, just remember about the
filter before you try 6m FM above 50.5.    A homebrew cavity may also b=
e
the way to go .... fun with filters.

73, Jon
W0ZQ




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                      Phil Lefever                                     =
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                      Sent by:                 cc:                     =
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                      nlrs-admin@mailman       Subject:  Re: [NLRS] Dea=
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                      01/06/03 12:59 AM                                =
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At 17:30 01/05/2003 -0600, you wrote:
>John,
>
>I have heard that ICE filter is pretty good... but I also heard that i=
t
was
>pretty expensive.
>
>If you don't me asking..... how much did it set you back?

John,

The ICE filters are fairly inexpensive ($35) and very small. I have a
number of them I use to minimize inter station interference at field da=
y.
They sell both a wide and narrow version for 6m. These filters are only=

rated at around 200 watts and I have heard tell of failures on the HF
models. You can order them from www.arraysolutions.com

The other option is a filter from DCI. These are larger and MUCH higher=

priced. They likely have slightly lower losses and better out of band
attenuation. These are also low power models too. I have a DCI filter
for 440MHz and it is an amazing piece of equipment. I used to use it
on a 70cm FM radio here at home. My antenna is about 1/2 mile east of
a commercial paging antenna. With the squelch full up and the preamp
in the radio disabled I had almost constant squawks breaking squelch!
With the filter in place and the preamp on I set squelch at the ragged
edge and have NEVER heard a squawk! I have never noticed any attenuatio=
n
issues with the filter unless I try to listen to public service (which
I can't hear at all!).

73

Phil



-----------------------------------------------------------------------=
--
Phil Lefever             KB=D8NES
 Twin Cities Repeater Club
kb0nes@tcrc.org
Burnsville,MN

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