RFI
[Top] [All Lists]

Re: [RFI] Ultrasonic Dish

To: RFI@contesting.com
Subject: Re: [RFI] Ultrasonic Dish
From: Don Moman VE6JY <ve6jy.1@gmail.com>
Date: Thu, 3 Jan 2013 00:18:36 +0000
List-post: <rfi@contesting.com">mailto:rfi@contesting.com>
I get that a lot here, loud on 2m, not there at 440.   Need a nice little
220 meg antenna to fill the gap so I was using a channel 13 yagi for that
area along with the ICOM R-10 wideband rx.  Also find one of the smaller
Create VHF/UHF logs quite handy for this stuff - I removed the lower
frequency elements near 50 mhz so I could get it in the vehicle easier.

73 Don
VE6JY

On Wed, Jan 2, 2013 at 11:21 PM, N1BUG <paul@n1bug.com> wrote:

> On 01/02/2013 06:08 PM, Hisashi T Fujinaka wrote:
>
>>
>> Thanks for all the info. That makes great sense. I've been using an MFJ
>> RFI detector which gets me in the neighborhood and I need something that
>> gets me closer. I was considering a hokey ultrasonic detector (I was
>> going to repurpose a kid's "Spy Ear") or a ~400MHz AM receiver and a
>> directional antenna at the same frequency.
>>
>
> I use an MFJ-856 (the one with the 3 element beam) as my primary location
> tool. To make it more useful, I added a 3 step attenuator and modified the
> unit to get the receiver out of the center of the yagi and clean up the
> yagi pattern a little. That unit alone gets me to 80% of the poles. In some
> cases there is still too much ambiguity. I use 445 MHz to resolve most of
> those down to a single pole. So far I've only found one case where the two
> units have not led me to a precise pole identification (135 MHz leaves too
> much ambiguity about which pole it is and 445 MHz hears nothing).
>
> Good luck!
>
> 73,
> Paul N1BUG
>
> ______________________________**_________________
> RFI mailing list
> RFI@contesting.com
> http://lists.contesting.com/**mailman/listinfo/rfi<http://lists.contesting.com/mailman/listinfo/rfi>
>
_______________________________________________
RFI mailing list
RFI@contesting.com
http://lists.contesting.com/mailman/listinfo/rfi

<Prev in Thread] Current Thread [Next in Thread>