[Elecraft] K2 No Power Output

[Don Wilhelm]

Murray,

Not only logical, but the only way to approach Transmit problems.
When you get to jumper W6, know that you can and should adjust the 
bandpass filters for maximum RF voltage there.

On a new build, be aware that the most common problems are soldering, 
misplaced or incorrect components and diode orientation.  If you suspect 
diode orientation problems, refer to the Parts Placement Diagrams in the 
back of the manual to check them.
Another common problem is inadequately stripped and tinned toroid 
leads.  You should be able to see a bit of tinned lead on the top of the 
board.

73,
Don W3FPR

On 6/26/2021 4:58 PM, VA1CQ wrote:
> Don,
>
> A logical suggestion. I already have made the RF Probe and it's ready 
> to use. I was hoping the cause of no power might be something simpler. 
> I will start troubleshooting in my next work session.
>
> Murray VA1CQ
>
> On 6/26/2021 5:34 PM, Don Wilhelm wrote:
>> Murray,
>>
>> I suggest that you build the RF Probe that was included with the K2 
>> kit.  The schematic is shown on page 9 of Appendix E along with the 
>> assembly instructions.
>> After that, start on Appendix E page 12 - Preparation for Transmitter 
>> Signal Tracing and follow the steps shown there.
>>
>> 73,
>> Don W3FPR
>>
>> On 6/26/2021 4:21 PM, VA1CQ wrote:
>>> I am just completing the build of K2 Serial No. 6397. Everything was 
>>> going perfectly with all receiver tests and adjustments. Everything 
>>> is in spec.
>>>
>>> Then I started the transmitter tests. I set the output power control 
>>> for 2.0 watts. Beginning on 40 metres, I am supposed to be able to 
>>> adjust L1 and L2 to measure 2 watts on the internal power meter. I 
>>> measure 0.1 to 0.2 watts. Nothing I adjust or do changes this. My 
>>> input voltage is 13.6V with 250 mA on receive and 600 mA on 
>>> transmit. I've taken a quick read through the Troubleshooting 
>>> section, but I'm wondering if I'm just doing something stupid and 
>>> only think I have a problem when I don't. Being new to the K2, 
>>> perhaps I'm not setting something correctly.
>>>
>>> Any tips for what I should do next?
>>>
>>> Murray VA1CQ
>>>
>>>
>>
>