[Elecraft] K3 tx power troubles

[Martin Sole]

Hi Bill,

I have the K3 working again, currently going great stuff on 10m to give 
it a good workout. Problem was one of those silly ones but also one that 
I have just recently read about on the reflector, the case of a loose 
TMP coax. In my case it turned out to be J7 on the KREF3 board.

Martin, HS0ZED




On 3/6/63 00:42, William Hammond wrote:
> https://ftp.elecraft.com/K3/Manuals%20Downloads/E740182%20KPA3CONMDKT%20Instruction%20Manual.pdf 
> <https://ftp.elecraft.com/K3/Manuals Downloads/E740182 KPA3CONMDKT 
> Instruction Manual.pdf>
>
> This describes the process...
>
> The parts needed are described on the first page of the document...
>
> 73, Bill-AK5X
>
>> On Jun 2, 2020, at 10:17 AM, Martin Sole <hs0zed at gmail.com 
>> <mailto:hs0zed at gmail.com>> wrote:
>>
>> My aging K3, S/N 298, is once again proving a little troublesome. 
>> Into a nice solid 50 ohm dummy load with a strong 14 volt supply and 
>> short thick cables never known to be an issue I see a maximum of 
>> about 10 watts out when set to 110 watts on the front panel. Starting 
>> at 0w it increases in line with the setting until about 3.5 watts. 
>> The LPA stops there and then when the KPA3 comes in it goes up to 
>> about 10 watts but beyond that no further increase.
>>
>> I presume this is a either a drive or and LPA issue but I suspect the 
>> actual cause might be well known here. What are the chances?
>>
>>
>> Regards
>> Martin, HS0ZED
>>
>>
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>