[1000mp] sticking relay problem and W8JI mod.

Wed, 24 Mar 2004 09:57:22 -0700

Hi  John:

I guess I am going to regret forever making the 1% SWAG. 

Oh well, maybe we will really solve this riddle this time. In spite of my 1%
statement, I do sort of worry that 'my time may come' and I will be the guy
writing about experiencing 'sticky relays, etc".

John, I guess the good news is that you have a hard failure, the Service
Manuals are "in the mail", and you are a very competent 'techie'. 

I will look for the next chapter in the "sticky relay saga".

73,  Mr. 99% (for the moment)

. 

>-----Original Message-----
>From: [email protected]
>[mailto:[email protected]] On Behalf Of W0UN --
>John Brosnahan
>Sent: Wednesday, March 24, 2004 5:07 AM
>To: [email protected]
>Subject: RE: [1000mp] sticking relay problem and W8JI mod.
>
>As I have mentioned, my 1000MP would lose about 60 dB (or
>more) of sensitivity after an hour or so.  So I assumed it
>must be temp related.
>Yet I could hit the MOX button and it would come back to life,
>although only for a few seconds typically.
>
>Well, I thought, maybe since I have only used it for RX for
>the past couple of years and hitting the MOX button will get
>it back sometimes, as well as turning it off for an hour,
>maybe it just needs to be cycled into transmit.  So I hooked
>up my keyer, turned the RF all the way down and ran a few
>hundred dots at 25 WPM.  Now it is dead all of the time.  I
>can faintly hear ONE, 50KW AM station very weakly.
>(WOAI is not all that strong in the best of times at 85 miles
>away and we are on a plateau, shielded from them.  But at S9
>the station is the loudest signal on the AM band.
>
>So now I don't know if freeze spray will work or not to help
>identify the culprit.  But since it continues to seem like a
>relay (or relay driver) I can inject noise into various points
>as a quick way to isolate the problem.  (He said, over optimistically.)
>
>And now for the good news, the service manuals have apparently
>been out of stock for a few months, but Vertex received FIVE
>from Japan a week or so ago and mine arrived yesterday.  So I
>will have some idea where I am poking or injecting.
>
>73--Mr. One Percent
>
>
>

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