[1000mp] Mark V

[Tod -MN]

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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