[Elecraft] K2 K2/100 post FD review

[Mike Kopacki]

Final update...

After several weeks of troubleshooting, led by Don, W3FPR, of realigning bandpass filters, checking RF and DC voltages per the K2 manual, and finally confirming that the bias voltages were correct to the Q7 & Q8 finals, Don suggested ordering the K2PAKIT and replacing the finals. 

I did that this morning and that corrected the problem. I’m now getting over 100w out on all bands except 10m where I’m getting 94w!

Don deserves all the credit and Don, I can’t thank you enough!  You are The Man!

If anybody catches up with Don, please buy him a beer on my behalf!

Thanks,
Mike NJ2OM 

> On Jul 1, 2020, at 8:49 AM, Mike Harris via Elecraft <elecraft at mailman.qth.net> wrote:
> 
> Mike,
> 
> You are the only one who can determine this. Everyone else is reduced to guessing because they don't have access to your PSU/K2/power lead.
> 
> Simple:
> 
> Measure the PSU voltage on RX at the PUS terminals.
> Measure the PSU voltage on TX set to 100W at the PSU terminals.
> 
> Compare both of these with the internal K2 voltage display.
> 
> Report the findings.
> 
> Regards,
> 
> Mike VP8NO
> 
> 
> 
>> On 30/06/2020 21:34, Mike Kopacki wrote:
>> I didn’t have ring connectors big enough but I did have spade connectors. I crimped and soldered them but there was no change in the voltage readings during receive and transmit.
>> Is it possible that the power supply is failing?
>> Why, if the voltage drops during transmit to 11.6V, does the radio still put out 100W on 30, 40 and 80 meters?
>> Thanks,
>> Mike NJ2OM
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