[1000mp] dumb question on RX ANT OUT

[w8gf]

Hey John:  Very useful explanation..... I use the RX Antenna input 
regularly but never really understood the other RCA jack.

Thanks, Gerry, W8GF



-----Original Message-----
From: 9m6xro at amsat.org
To: All about Yaesu 1000mp <1000mp at mailman.qth.net>
Sent: Sun, 5 Apr 2009 1:57 am
Subject: Re: [1000mp] dumb question on RX ANT OUT



Hi Tonno

What Billy says is right. Just to elaborate and confuse it a bit more:

1) If you select Ant A (for TX) and push the RX button on the front
panel the received signal from Ant A appears at the RX ANT - OUT socket.

2) If you select Ant B (for TX) and push the RX button, the received
signal from Ant B appears at the RX ANT - OUT socket.

In both above cases there is no antenna connected to the FT-1000MP
Receiver UNLESS you have an antenna connected to the RX ANT - IN socket.

You could, as already suggested, for example :

(A) take the output from the RX ANT - OUT socket and connect it to a
separate RX with better filters or whatever and listen on it.

(B) take the output from the RX ANT - OUT socket and feed it thru a RX
preamp and route the output from the preamp back to the RX ANT - IN
socket.

(C) use a QRM Eliminator/Noise Phasing Unit such as the MFJ connected
between RX ANT - OUT and RX ANT - IN sockets.

Another point. On the low bands I use a vertical ant to transmit (Ant A)
with a separate quieter a
ntenna for receiving which I connect to RX ANT
- IN. I push the RX Ant button on the front panel to do this. BUT NOTE :
the signal from the receiving antenna connected to the RX ANT - IN
socket never connects to the RX ANT - OUT socket regardless of switch
positions. In other words only Ant A or B (whichever you select for TX)
will connect to the RX ANT - OUT socket.

Confused yet??  I am! BTW there are other functions on the FT-1000MP
which I have yet to figure out after years of use!

73 - John - 9M6XRO


On Sat, 4 Apr 2009 16:34:57 -0400 (EDT), "Billy Cox"
<aa4nu at ix.netcom.com> said:
> Hello Tonno, to your questions ...
>
> "Is there anything else that this output depends on?"
>
> Not that I am aware of.
>
> "Does it mean that I get main TX ANT signal from RX
> ANT OUT and route it through preamp to RX ANT IN??"
>
> Yes, with the RX ANT switch engaged.
>
> 73 de Billy, AA4NU
>
> >Thanks, I checked the manual again and there is unfortunately
> >no schematic and even no reference to RX ANT OUT jack at all
> >it seems to me.
> >
> >Can you or anyone tell what is the output of this jack then when
> >RX ANT is selected and when say A ANT is selected if it depends
> >on that. Is there anything else that this output depends on?
> >
> >And how does this inline preamp thing work? Does it mean that I
> >get main TX ANT signal from RX ANT OUT a
nd route it through preamp
> >to RX ANT IN??
> >
> >73
> >Tonno
> >
> >-----Original Message-----
> >From: 1000mp-bounces at mailman.qth.net 
[mailto:1000mp-bounces at mailman.qth.net]
On Behalf Of Billy Cox
> >The RX ANT OUT can be used to route the RX signal to
> >another receiver, or similar device like a transverter.
> >
> >Used together <RX ANT OUT with RX ANT ON> provides an
> >easy way to add an inline preamp or a noise reduction
> >device like the MFJ-1026 without have to switch in it
> >and out of the MAIN TX line.
> >
> >And YES, the RX ANT OUT is dependent on the antenna
> >choice. Check the schematic for more details as to
> >how the switching is accomplished.
> >
> >Hope this helps!
> >
> >73 de Billy, AA4NU
> >
> >-----Original Message-----
> >>From: Tõnno Vähk <Tonno.Vahk at gildbankers.com>
> >>This is a silly question but after all the years I don't
> >>understand what exactly the RX ANT OUT jack is used for.
> >>Even manual does not help.
> >>
> >>What and when is the output from RX ANT OUT jack?
> >>Does it depend on the antenna choice (A/B/RX)?
> >>
> >>73
> >>Tonno
> >>ES5TV
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