[1000mp] Important question

[Pete Smith]

Well, I am not too surprised.  In my station my 20m harmonic from the Mark 5 on 40 is ~S7 with bandpass filters on both radiops - 80 feet is not a long way in terms of isolation.

The classical way to reduce second harmonics is with bandpass filters or stubs.  W2VJN has written an excellent book on the subject.

73, Pete N4ZR

 At 03:39 PM 12/4/2005, you wrote:
>Hello Pete
>Well I have 3 antennas on 40 meters and also 3 on 20 meters, but it seems
>there is almost no difference between
>the selected 20 meter antenna....
>But there is a good spacing....as they are on different towers.about 80 ft
>apart
>Regards
>NOEL
>----- Original Message -----
>From: "Pete Smith" <pete.n4zr at gmail.com>
>To: "All about Yaesu 1000mp" <1000mp at mailman.qth.net>
>Sent: Sunday, December 04, 2005 15:33
>Subject: Re: [1000mp] Important question
>
>
>> How far apart are the antennas?
>>
>> 73, Pete N4ZR
>>
>> At 03:25 PM 12/4/2005, you wrote:
>> >Hello Everybody
>> >I wonder what is the best way to reduce harmonic from a MARK FIELD  on 40
>meters for example, and another FIELD on 20 meter ...
>> >Is it normal to have a reading of S9 on 20 meters(example14.078) for 100
>watts out from the second MARRK V at 7.039????
>> >Please any advice will help a lot
>> >Thanks
>> >NOEL
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