[Yaesu] Yaesu FT221R question

[Roy Reed]

> 
> >
> > :
> > >
> > > A big thank you to all who replied to my question.For others interested
> > > I am told that the PB-1671 is the YC221 display interface board and the
> > > PB-1568 is the Key click mod board.
> > >      All much appreciated.
> > >                73 Roy g3zig.
> > >
> > > Roy Reed wrote:
> > > >
> > > > Hi All,
> > > >        One of the FT221's I have been working on has 2 extra circuit
> > > > boards on the under side .They are PB-1671 and PB-1568. Can anyone
> > > > please tell what they are used for.Some wiring appears to go to the rear
> > > > tone plug.Thanking you in anticipation.
> > > >             73 Roy g3zig.
> 
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