Steven, N5SK wrote:
Make sure to get the 600-Hz (or is it really 500-Hz?) filter for the
sub-receiver. Otherwise, you'll think you went deaf when you're
listening
to a station through the main receiver's 500-Hz filter and you send
that
frequency to the sub-receiver. Unlike most other manufacturers,
Yaesu
didn't bother spending the extra penny for a couple of diodes to
steer
the
signals through the sub-receiver's wide filter when the optional
narrow
filter isn't installed.
Actually, this will only happen in CW mode. If you are in USB or
LSB the sub-receiver will also work. In CW it does indeed go
dead, *but* if you set the sub-rx for USB or LSB while the main
rx is in CW mode, it will spring back to life. This can be very
annoying, however, and the easiest thing is to install the
sub-rx CW filter if you operate that mode. BTW if you set the
sub-rx for SSB modes, it is also set for SSB bandwidth!
It probably doesn't make any difference which
brand
you get for the sub-receiver's narrow filter: I'm not even sure if
InRad
makes one for the sub-receiver.
Inrad makes a couple of narrower CW filters for the sub-rx.
Something like 400Hz and 250Hz if I remember right. The
Yaesu 600Hz unit is probably fine for most operators. If
you do a lot of contesting, the Inrads would make life a lot
easier. They would also help if you do a lot of weak signal
DXing on the noisy low bands.
I believe that the FT-1000D does not ship with the 250Hz
3rd IF filter, but it does have the 250Hz 2nd IF unit. KD5VC
published a clever mod that runs the 250 2nd IF filter with
the 500Hz 3rd IF filter (the default is to cascade with the
2.4KHz unit). See:
http://www.angelfire.com/md/k3ky/page64.html
and click on the two KD5VC items.
73, David K3KY
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