[Elecraft] problem with K2, KAT100 and K2100PA combo

[Fred Jensen]

Found that out the hard way and fried a trace on the RF board.  
Fortunately, it was repairable.  Unfortunately, it wasn't very easy.  
One of mine is now painted black [I'm colorblind].  If you have a 
K2/KPA100 combo, it's easy to get the amp off, I'd do it now.

73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

Jay Rutherford wrote on 7/12/2022 7:34 PM:
> Wayne,
>
> Years ago, on my 2000 K2, I discovered that it was possible to interchange the ATU plug to the main board with another one of the same size, with very bad results. I applied gold paint to one of the pair in the hopes of avoiding ever interchanging them by accident. So far, so good.
>
> 73
> Jay K3BH
>
> On Tue, Jul 12, 2022, at 21:37, Wayne Burdick wrote:
>> We've used APP connectors for over 20 years on Elecraft products. When
>> properly assembled and inserted they're very reliable, not to mention
>> intuitively color-coded. There is nothing covert about them.
>>
>> I may be slightly biased by my fear of starting over with something
>> else, with the resulting incompatibilities, discontent, and non-deleted
>> expletives.
>>
>> W
>>
>>
>>> On Jul 12, 2022, at 6:26 PM, Jay Rutherford<k3bh at arrl.net>  wrote:
>>>
>>> Sorry to flog this poor horse once more. My XT90 AMASS connector failed due to not being completely inserted with the mate on a 52volt e-trike. It burned up one of the conductors inside the female plug.
>>>
>>> I have never had a failure of an Anderson powerpole in many years of using them. It is easy to see when they are not completely connected.
>>>
>>> Just to give a different perspective on the subject.
>>>
>>> 73,
>>> Jay K3BH
>>>
>>> On Tue, Jul 12, 2022, at 21:19, jerry wrote:
>>>> I had a PowerPole fail on me once.  Dirt or corrosion on the one flat
>>>> contact.
>>>> Once was enough.  Back in the day, I had standardized on double banana
>>>> plugs.  In 50 years of ham radio, I NEVER had one fail on me in any way.
>>>>   Only trouble with the double bananas is they're not keyed for polarity.
>>>>   I was always *very* careful about that.
>>>>
>>>>    As a electronic bench tech back in the 70's, I had a lot of experience
>>>> with test sets and connectors enduring thousands of cycles.  The very
>>>> best - most reliable - connectors all had a round pin in a round hole.
>>>> All hail Augat machine sockets!
>>>>
>>>>    The AMASS connectors feature a round pin that plugs into a round hole.
>>>>   It has just the right spring tension.  They are polarized - you can't
>>>> plug them in backwards.  They are popular with the RC drone crowd, but
>>>> are also making it into other equipment.
>>>>
>>>>     I am using AMASS XT90 connectors on my kilowatt LDMOS linear project.
>>>>
>>>>                       - Jerry, KF6VB
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