[1000mp] 40 Meter unique problem

[Cliff Buttschardt]

W70m at aol.com wrote:
>  
> Normally one would conclude the following is an antenna problem and  not with 
> my old reliable FT-1000MP.  Yet, now the antenna checks out  okay.  I am 
> seeking someone who might have experienced a similar  situation.
>  
> Last night in the NCCC sprint, when running 100 watts to a two  element 
> Cushcraft yagi, the VSWR went to the pin on 40 meters only.   The receive signal 
> intermittently dropped by 20db or more.  Application of  power by tripping the 
> footswitch, restored the receive signal; only to drop  again later.  The VSWR 
> remained high.  I have had the receive signal  drop problem before.  It behaves 
> like a relay did not return to the  closed position.
>  
> 
> Today the antenna checks okay with 100w and full power.  Last  night while 
> the antenna gave high VSWR on 40, it showed low VSWR on 17 and 12 as  usual.
>  
> 
> Any suggestions?  Please reply direct and thanks for the  help.
>  
> 73
>  
> Rod W7OM

Rod, probably the first thing to so is push the A/B antenna switch
and move the antenna coax to the alternate position.  These are simple
relays to replace.  Failing that, it probably is the change over relay
and that is NOT simple to replace!  Cliff K7RR