[1000mp] FT-1000MP Mark V Field Collins Filter Orientation

Wed, 28 Jan 2004 12:53:15 -0000

Hi Harry.
Yes i to pondered over the correct orentation of the filters, i to have all
recomended yaesu filters fitted to my ft1000mp.
What i did was to check the if strip schematic diagram which show's the
additional componets fitted on one side of the push in filter assembly, and
go from there.
>From memory as you say not all the filters carry the extra
resistors/components.
Best wishes de Graeme ---- G4CKH.
----- Original Message -----
From: "Harry Yingst" <[email protected]>
To: "Yaesu_1000mp" <[email protected]>
Sent: Wednesday, January 28, 2004 3:20 AM
Subject: [1000mp] FT-1000MP Mark V Field Collins Filter Orientation


> I purchased all of the optional Yaesu filters for the Main and Sub
> receivers.
>
> The Crystal filters appear to be symmetrical and can go in either way
> but the 500 Hz Collins filters do not appear to be symmetrical since
> there is additional circuity on them but they can physically fit either
> way as well.
>
>
> Upon searching the Internet in reference to the original FT-1000MP I
> found a few messages one said: "Those extra components comprise a mild
> attenuation circuit"
>
> And another that said: "Crystal filters can be installed either way,
> but there is definitely ONE way to install the mechanical filters if
> you want the radio to match the schematic published in the SERVICE
> Manual (not the Operating Manual).
>
> The Service Manual shows the impedance bridge on the OUTPUT of the
> mechanical filter, not the input."
>
>
> Does any one know for sure what is the correct Orientation for the
> Collins Filters for the Main and Sub Receivers are?
>
> I would think that there is only one proper Orientation for these
> filters.
>
>
>
>
>
> =====
> -
> Harry - AB2PN
>
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