[Elecraft] Day 1: Fried something already?

[Owen B. Mehegan]

Hi Don -

Many thanks for your help! L25 and L26 look totally clean so I'm not  
going to mess with them for the moment. I'll look into testing K12,  
though I probably won't get to it until tomorrow. Can you clarify what  
I should do to set up this test?

1. Tune the K2 to 40m
2. Power off
3. Check for continuity between pins 7-8 and 3-4 on K12.

Are you saying I need to lift one of the leads on T4 before doing this  
test, or is that just a caution in the event that I see other anomalies?

--
owen at nerdnetworks.org (Owen B. Mehegan)
'I learned this, at least, by my experiment;
that if one advances confidently in the direction of his dreams,
and endeavors to live the life which he has imagined,
he will meet with a success unexpected in common hours.'
  --Henry David Thoreau

On Nov 7, 2010, at 10:52 AM, Don Wilhelm wrote:

> Owen,
>
> Armed with that further information, I suspect the relay contacts.   
> Examine the inductors anyway to see if there is any evidence of  
> charred turns, if so, re-wind them.
>
> You can check the relay contacts of K12 with an ohmmeter.  If you  
> set the K2 to 40 meters, Relay K12 should be in the position  
> opposite that shown on the schematic.  That means continuity between  
> pins 7 and 8, and 3 and 4  - be aware that at DC, the entire low  
> pass filter will measure as a short to ground unless you lift lead #  
> 3 or #4 from T4.  Many have drawn false conclusions because of this  
> DC path to ground.
>
> On 11/7/2010 1:37 PM, Owen B. Mehegan wrote:
>> 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.
>>
>