[1000mp] FT-1000MP RX antenna question

[Tod -ID]

Mark:

I went through the schematic a couple of years ago and thought that it was
not grounded. Yuri suggested I re-examine the schematic and I did. The
second time through I concluded that the RX input from the RF IN jack on the
back is grounded during transmit.

I may go through the process once again just to be absolutely certain, but
maybe this is something the individual owner should do so they feel
comfortable about the risk. The obvious, no risk method is to put in a
special grounding relay that is activated when transmitting.


Tod, K0TO

 

> -----Original Message-----
> From: 1000mp-bounces at mailman.qth.net 
> [mailto:1000mp-bounces at mailman.qth.net] On Behalf Of Marc 
> Wullaert ON4MA
> Sent: Tuesday, December 23, 2008 10:46 AM
> To: All about Yaesu 1000mp
> Subject: Re: [1000mp] FT-1000MP RX antenna question
> 
> I'm not so sure it go's to ground ..it open thats all.
> 
> on4ma
> 
> ----- Original Message -----
> From: "Tod -ID" <tod at k0to.us>
> To: <cqkg8co at yahoo.com>; "'All about Yaesu 1000mp'" 
> <1000mp at mailman.qth.net>
> Sent: Monday, December 22, 2008 4:06 AM
> Subject: RE: [1000mp] FT-1000MP RX antenna question
> 
> 
> > It goes to ground. You can check that on the schematic.
> >
> > Tod, K0TO
> >
> >> -----Original Message-----
> >> From: 1000mp-bounces at mailman.qth.net
> >> [mailto:1000mp-bounces at mailman.qth.net] On Behalf Of Brian
> >> Sarkisian, KG8CO
> >> Sent: Sunday, December 21, 2008 12:37 PM
> >> To: 1000mp at mailman.qth.net
> >> Subject: [1000mp] FT-1000MP RX antenna question
> >>
> >> I saw this question on another reflector, and haven't been
> >> able to find the answer to the RX antenna question.
> >>
> >> Does the RX antenna go to ground while transmitting, or
> >> should some sort of front end saver be put in line?
> >>
> >> Thank you
> >>
> >>
> >> Brian, KG8CO
> >>
> >>
> >> I have the service manual here for the FT1000MP but I can't
> >> tell whether = or not the RX antenna is grounded during
> >> transmit. Does anyone out there = know?? I am using a loop
> >> receive antenna on 160M and don't have any = outboard
> >> protection on it at present.
> >>
> >>
> >>
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> >
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