[VHFcontesting] 6M and 2M Bandpass Filters

[Alex]

Hi John,

I run a kW on both bands with the antennas mounted on the same mast and always experienced minimal interference on either band (IC-7300/9700 combo). However, I still added a B&W low pass filter on 6m and a DCI bandpass filter on 2m to get rid of even that last little bit of noise increase I was experiencing from transmitting on the opposite band/radio.

I put my filters between the radios and the amplifiers so I only needed "barefoot" capable filters.

Of course, if you run preamps than the story changes.

73,
--Alex KR1ST


On Apr 8, 2022, 12:56 PM, at 12:56 PM, "John O’Mara" <w4nf at comcast.net> wrote:
>Good morning,
>I’m part of the W4IY Flagpole Knob VHF Contest Group (FM08jm). We have
>been operating from Flagpole Knob continuously for over 30 years.
>Thanks for all the Qs. 
>
>We experienced higher than normal interference between our 6 and 2M
>stations during September last year and I wanted to look into what
>others may be using and their experiences with bandpass filters, stubs,
>etc. to minimize interference between stations. We are running 500W on
>6M and 1.2KW on 2M. We try to space the antennas as far apart as
>possible but the the top of the Knob is only so big. 
>
>I appreciate any assistance you can provide. Thanks and 73, JackW4NF
>W4IY 4300’ ASL FM08jm
>
>Sent from my iPad
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