Posted by
Jim KO5V on
Feb 08, 2019; 12:41am
URL: http://elecraft.85.s1.nabble.com/K2-I-killed-my-KPA100-tp7648715p7648775.html
Don,
It is all working again!
The power supply's negative terminal was the problem. The terminal wan't falling off, but the internal side of the plastic feed-thru washer had cracked, and about half fell off inside. That caused it to loosen up slightly. Without the KPA hooked up, it supplied the LP-100 with enough current, and it measured the correct voltage, so I assumed it was OK, and eliminated it.
I also mentioned that I was having trouble getting the K2 to communicate with a logging program, and again, I was convinced that my home-built multi-cable assembly was the culprit. It is now working. I replaced the BRAND NEW 6' long DB9 to DB9 serial cable (purchased from a "large on-line retailer"), with an old one I bought years ago at Radio Shack.
I have a lot of experience that tells me that I should check my work first, but now I know not to trust everything else - even if it is new.
Thanks again for your help. 73,
Jim KO5V
>-----Original Message-----
>>From: Don Wilhelm <
[hidden email]>
>>Sent: Feb 7, 2019 12:22 PM
>>To: Jim KO5V <
[hidden email]>
>>Subject: Re: K2: I killed my KPA100
>>
>>Jim,
>>
>>That certainly could cause the problem.
>>
>>73,
>>Don W3FPR
>>
>>On 2/7/2019 1:50 PM, Jim KO5V wrote:
>>> Don,
>>>
>>> OK, I again thoroughly checked the PP connectors and the fuse/fuse holder, they're good, so I decided to remove the cable from the power supply, and the bolt negative output of the Tripp-Lite rotated. I opened it up and found the insulating washer was broken. I need to go to the hardware store and get a couple of new washers, but I'll bet that's the problem. It would run my LP100 when it was the only thing connected, but that draws little current. I just assumed the problem was my work - and it may still be! I'll let you know what happens after I repair the supply.
>>>
>>> Thanks for your patience. 73,
>>>
>>> Jim KO5V
>>>
>>>
>>> -----Original Message-----
>>>> From: Don Wilhelm <
[hidden email]>
>>>> Sent: Feb 7, 2019 11:00 AM
>>>> To: Jim KO5V <
[hidden email]>
>>>> Subject: Re: K2: I killed my KPA100
>>>>
>>>> Jim,
>>>>
>>>> All that says the KPA100 should be OK, check the Anderson Power poles
>>>> for proper insertion of the contact blades both on your power cable and
>>>> on the KPA100.
>>
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