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

[Jim Gerke]

I installed my filters using the illustrations on pages 112 & 113 of the Mark V
Field Operating Manual. I matched the orientation of the lettering on the
filters themselves with the illustrations. That was a year ago and everything
appears to work fine.

73, Jim, K5QL

Harry Yingst wrote:
> 
> 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