Unexpected Band / Mode switching

[AD6XY]

I have a fairly elderly K3, SN500s. I have noticed recently that occasionally when I hit the band up switch the mode changes but the band doesn't. Seems to be getting more frequent. Is this a common problem and is there a fix?

Mike

[markmusick]

Mike,
Your problem is most likely the front panel connectors. This is a known
problem for early K3s. Early K3s had tin connectors between the front panel
and RF board. Elecraft switched to gold connectors around serial #4000. I
just had my serial #3505 in for upgrades and they switched the connectors
while they had it.
You can contact Elecraft and they will send you the gold connectors for you
to switch out yourself or send the radio back to Elecraft and they will
change them for you if you are uncomfortable doing it yourself.

Mark Musick, WB9CIF

-----Original Message-----
From: Elecraft [mailto:[hidden email]] On Behalf Of AD6XY
Sent: Tuesday, August 9, 2016 12:40 PM
To: [hidden email]
Subject: [Elecraft] Unexpected Band / Mode switching

I have a fairly elderly K3, SN500s. I have noticed recently that
occasionally when I hit the band up switch the mode changes but the band
doesn't. Seems to be getting more frequent. Is this a common problem and is
there a fix?

Mike



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[AD6XY]

Thanks - makes sense. Presumably tarnishing. Couldn't I just clean them?

-----Original Message-----
From: Mark E. Musick [mailto:[hidden email]]
Sent: Tuesday, August 9, 2016 3:05 PM
To: 'AD6XY' <[hidden email]>; [hidden email]
Subject: RE: [Elecraft] Unexpected Band / Mode switching

Mike,
Your problem is most likely the front panel connectors. This is a known
problem for early K3s. Early K3s had tin connectors between the front panel
and RF board. Elecraft switched to gold connectors around serial #4000. I
just had my serial #3505 in for upgrades and they switched the connectors
while they had it.
You can contact Elecraft and they will send you the gold connectors for you
to switch out yourself or send the radio back to Elecraft and they will
change them for you if you are uncomfortable doing it yourself.

Mark Musick, WB9CIF

-----Original Message-----
From: Elecraft [mailto:[hidden email]] On Behalf Of AD6XY
Sent: Tuesday, August 9, 2016 12:40 PM
To: [hidden email]
Subject: [Elecraft] Unexpected Band / Mode switching

I have a fairly elderly K3, SN500s. I have noticed recently that
occasionally when I hit the band up switch the mode changes but the band
doesn't. Seems to be getting more frequent. Is this a common problem and is
there a fix?

Mike



--
View this message in context:
http://elecraft.365791.n2.nabble.com/Unexpected-Band-Mode-switching-tp762141
2.html
Sent from the Elecraft mailing list archive at Nabble.com.
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[Don Wilhelm]

Mike,

Cleaning is a temporary fix.  Changing to the gold pins is a permanent
solution.

You could try just removing the front panel and putting it back on.  The
wiping action that results will clean oxidation from the pins.
Do that as a temporary fix.  The real fix is to change to the gold pin
connectors.

73,
Don W3FPR

On 8/9/2016 10:06 AM, Mike Willis wrote:
> Thanks - makes sense. Presumably tarnishing. Couldn't I just clean them?
>
>

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[KEN-3]

I have recently had my K3 switch modes as I tune up the band. Like from
LSB to CW.  My s/n is 6000+ though.


Ken WA8JXM


On 8/9/16 10:04 AM, Mark E. Musick wrote:
> Your problem is most likely the front panel connectors. This is a known
> problem for early K3s. Early K3s had tin connectors between the front panel
> and RF board. Elecraft switched to gold connectors around serial #4000. I
> just had my serial #3505 in for upgrades and they switched the connectors
> while they had it.

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