[1000mp] Re: 1000mp Digest, Vol 19, Issue 13 -------To Post a question????

[Kelly Jones]

Yup, this sounds exactly like what happened to my Mrk V.  If you have an 
amp attached that uses the T/R relay without a buffer circuit, I would be 
willing to bet this is exactly your problem.  Mine started very 
intermittent just like yours at about 6 months.  After a year, it was 
happening about 50% of the time I'd unkey.  The interesting thing is that 
it seemed to depend on the circuit load.  With no amp attached, I could not 
get it to happen.  With my DMM, it would only happen once in every 20 
keys.  With a friends DMM, it would happen about 10% of the time, and with 
the amp inline, 50%.

73
Kelly - N0VD



At 01:08 PM 11/16/2005, you wrote:
>You probably need a new T/R relay. I'm sure Yaesu would be able to figure 
>out the problem, even if you only send the note you posted to this list. A 
>phone call to Yaesu would probably yield more info about their knowledge 
>of this problem than any info on this list, however.
>
>I think this is an ongoing problem, but it usually takes longer to manifest.
>
>I'm sure the rig will be repaired fine.
>
>73,
>Scott, N9AA
>
>K8CIX at aol.com wrote:
>
>>From: Roger Horton (k8cix at aol.com)
>>
>>I am having problems with my 3  month old FT-1000MKV-Field.  Receive 
>>sensitivity on the main receiver drops  intermittently after 
>>transmit.  It seems almost as if attenuation is  present or a dirty relay 
>>contact.  No panel controls affect this.  The  Sub-Receiver is fine and 
>>shows full signal strength at all times even if main  sensitivity is 
>>low.  If main receiver is showing 2 s-units in this  condition, sub 
>>receiver may be showing s-9.  Changing antenna positions  does not 
>>help.  Changing bands, while in this state does not help.  I  can only 
>>return the main receiver sensitivity by bumping the transmit switch a
>>couple of times.  This happens numerous times during a qso or during 
>>the  day.
>>It started 2 months ago but was very intermittent.  Now is 
>>happens  enough times during the day for me to have compiled a good list 
>>of symptoms and  list of things that have not effect on the problem.
>>I am not sure, however, if Yaesu service will have the patience to test the
>>radio long enough for the problem to occur or if this is an ongoing 
>>problem and  the will know what to change or repair from my symptoms 
>>list.  Anyone else
>>had this problem??
>>I am sure it is not a relay problem as described in other posts because of
>>it happening on all bands as I change them while the problem is present.
>>Thanks,  Roger Horton  K8CIX---------McGill, NV.
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>>
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