[1000mp] Mark V

[Mike Schatzberg]

There is indeed a preselector on the Mark V called the VRF.  It can indeed 
help with intermod on the lower frequencies.  It has to  be engaged manually 
to work however.

Mike
W2AJI
----- Original Message ----- 
From: "Tod -MN" <tod at k0to.us>
To: "'J. C. Mc Laughlin'" <jcm at power-net.net>; "'All about Yaesu 1000mp'" 
<1000mp at mailman.qth.net>
Sent: Monday, May 31, 2010 2:49 PM
Subject: Re: [1000mp] Mark V


> Did you say that you had tried using the B input port rather than the A
> input and that when you did that there was no change with respect to the
> problem?
>
> For some reason I thought that there was some sort of RF tuning of the 
> front
> end for RX in the Mark V which is not present in the MP. Someone else may
> have a better fix on that. The Service manual should detail the signal 
> path
> if someone has a copy for the Mark V.
>
> Tod, K0TO
>
>
>
>> -----Original Message-----
>> From: 1000mp-bounces at mailman.qth.net
>> [mailto:1000mp-bounces at mailman.qth.net] On Behalf Of J. C. Mc Laughlin
>> Sent: Monday, May 31, 2010 10:27 AM
>> To: Mike Schatzberg
>> Cc: 1000MP Dec2001
>> Subject: Re: [1000mp] Mark V
>>
>> Dear Mike W2AJI:   It sure seems as if it is time to do some
>> signal tracing.
>> Hard to believe that the previous owner (characterized as a
>> rag-chewer) would have made any internal modifications.
>>
>> Tuner appears to work as expected on transmit.
>>
>> My longtime friend and colleague (he was once my student and
>> now we are both retired professors) has taken a trip to
>> Sweden.  I will consolidate the suggestions that have been
>> received.  One of the things I will suggest is to take the
>> radio to our lab and use a spectrum analyzer to detect any
>> spurious oscillations.  I have used that technique before to
>> check LO frequencies.
>>
>> It would have been silly to want the tuner in line on
>> receiving - now that I think about it - as the sensitivity is
>> far more than enough on HF.
>>
>> Thanks again.   73,    Mac   N8TT
>>
>> J. McLaughlin;  Michigan, USA
>> Home:  JCM at power-net.net
>> ----- Original Message -----
>> From: "Mike Schatzberg" <cherokeehillfarm at earthlink.net>
>> To: "J. C. Mc Laughlin" <jcm at power-net.net>
>> Sent: Monday, May 31, 2010 9:23 AM
>> Subject: Re: [1000mp] Mark V
>>
>>
>> >I would open the radio and check for some modification which
>> may have been
>> >made to the tuner signal path switching.  Someone may have
>> tried to add the
>> >tuner into the receive path as an improvement in the design.
>> >
>> > I assume the tuner is working as it should on transmit?  It
>> is switching
>> > and tuning?
>> >
>> > Mike
>> > ----- Original Message ----- 
>> > From: "J. C. Mc Laughlin" <jcm at power-net.net>
>> > To: "Mike Schatzberg" <cherokeehillfarm at earthlink.net>;
>> "All about Yaesu
>> > 1000mp" <1000mp at mailman.qth.net>
>> > Sent: Monday, May 31, 2010 9:00 AM
>> > Subject: Re: [1000mp] Mark V
>> >
>> >
>> >> Dear Mike W2AJI:    Yes.    Not tried:  the receive port
>> as it is desired
>> >> to transmit and receive on the same antenna and a
>> reasonable receive-only
>> >> antenna does not (can not) exist.
>> >>
>> >> Also tried:  FT1000 MkV was connected directly to the
>> antenna.  The
>> >> antenna is a 40 foot (approximately) vertical with radials within
>> >> something like 100 feet of a fresh-water lake.  With
>> previous rig (the
>> >> little Yaesu) a SG-230 at the base of the antenna was used.
>> >>
>> >> Thanks for your continuing assistance.  73,  Mac  N8TT
>> >>
>> >> P.S.:  Who is cherokeehillfarm at earthlink.net  who wants
>> one to register
>> >> with him before he will respond?
>> >>
>> >> J. McLaughlin;  Michigan, USA
>> >> Home:  JCM at power-net.net
>> >> ----- Original Message ----- 
>> >> From: "Mike Schatzberg" <cherokeehillfarm at earthlink.net>
>> >> To: "J. C. Mc Laughlin" <jcm at power-net.net>; "All about
>> Yaesu 1000mp"
>> >> <1000mp at mailman.qth.net>
>> >> Sent: Monday, May 31, 2010 8:47 AM
>> >> Subject: RE: [1000mp] Mark V
>> >>
>> >>
>> >> If you change the antenna port from A to B do you still
>> get the problem?
>> >>
>> >> 73,
>> >> Mike
>> >> W2AJI
>> >>
>> >> -----Original Message-----
>> >> From: J. C. Mc Laughlin <jcm at power-net.net>
>> >> Sent: Monday, May 31, 2010 8:37 AM
>> >> To: Barry Mitchell <bmitch1 at optusnet.net.au>
>> >> Cc: 1000MP Dec2001 <1000mp at mailman.qth.net>
>> >> Subject: Re: [1000mp] Mark V
>> >>
>> >> Dear Barry VK6WF:
>> >>
>> >>    Thanks for the hint.  I will double check, but I think
>> that each of
>> >> those settings (flat vs. tuned) were tried.  I use "tuned"
>> on my FT1000
>> >> MkV
>> >
>>
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