[Elecraft] Day 1: Fried something already?

[Owen B. Mehegan]

I just tried the test for the inductors. With no antenna attached, I  
read 1.7k ohms from antenna center conductor to ground (tuned 40  
meters, then powered off). I am able to read continuity across L25 and  
L26 though...

I think I can borrow a Fluke meter from a friend which can test  
capacitors, so I'll try to do that.

--
owen at nerdnetworks.org (Owen B. Mehegan)
'When I was in sixth grade many years ago, I passed out after gym  
class one day. When I woke up, I had vivid memories of cartoonish  
bananas dancing around a red pool of blood, chanting 'E equals MC  
squared' over and over.'
   --Poster to ask.metafilter.com

On Nov 7, 2010, at 10:07 AM, Don Wilhelm wrote:

> Owen,
>
> That all means that you have a problem with the 40 ,meter low pass  
> filter.L25, L26,C225, C226, C227, C228, C229 and the contacts of K12  
> are all potential suspects that need to be checked.
> One quick test would be to set to 40 meters and power off (the  
> relays are latching types) and measure the resistance between the  
> center conductor of the antenna jack and ground.  If the inductors  
> have continuity, you should read close to zero ohms.   If that is  
> true, that does not rule the inductors out entirely, but moves them  
> lower on the suspect list.
>
> If you have no way to measure the capacitors, I might suggest that  
> you order all the components listed above and replace all of them -  
> much less frustration than trying each one at a time.
>
> 73,
> Don W3FPR
>
> On 11/7/2010 12:12 PM, Owen B. Mehegan wrote:
>> Hello Don, thanks for your prompt reply (again - you helped me
>> diagnose my misplacement of C6 in the BPF section a couple of weeks
>> back).
>>
>> I do not have the KPA100, just a base K2 with the SSB module added. I
>> was using an external Tokyo Hy-Power amp when this mishap occurred.
>>
>> I've just done the test you described, with a wattmeter and a dummy
>> load. It's not as bad as I thought at first - only 40 seems affected.
>> No matter what power setting I choose on 40, when I press TUNE the K2
>> shows a high current warning, and then about .4 watts output, and the
>> needle on the wattmeter doesn't even flicker. All other bands can put
>> out their usual amounts of power with no problems.
>>
>