[Elecraft] setting KPA 100 page 48 problem

[Don Wilhelm]

Christophe,

The most common cause of a 40 meter only failure in the K2 is an 
incorrect setting of the D19 secondary menu parameter.

If you have the K60XV option installed, or if you installed the "Rework 
Eliminators" when you built the K2, you must set D19 to "y".

If you do not have either the K60XV or the Rework Eliminators, then the 
D19 parameter must be set to "n".

If the above is not applicable, you may have a problem in the 40 meter 
bandpass filter.   Check the capacitors in that bandpass filter - C5 and 
C7 = 100pF, C4 and C8 = 820pF, C6 = 4.7pF.
Also check the VFO frequency when the K2 is set to 7100kHz, it should be 
close to 12,015kHz.

73,
Don W3FPR

On 4/10/2020 9:29 AM, Christophe aufacf wrote:
> hello Don, hello everyone,
>
> this morning I tested the K2 on my own.
>
> the consumption (ampere) of K2 gave me part of the solution
>
> the K2 alone in transmission consumes 0.5 amp on 40M then on the other
> 2 amp bands with a setting at 5Watts
>
> so I have no broadcast on 40M only, we can hear the relays switch ...
>
> after I admit being a bit lost to know where to start
>
> I will review the soldering of relays K1, K12, K14 in case ...
>
> could you give me advice since you know the K2 very well
>
> Thanks in advance Don
>
> 73 ,F8ACF
>
> # K2 7369 - kpa 100 in progress
>
> Le ven. 10 avr. 2020 à 03:11, Don Wilhelm <donwilh at embarqmail.com> a écrit :
>> Christophe,
>>
>> I forgot to mention,
>> Before attempting to adjust the C1 null, first pre-set R26 and R27 to
>> 43k ohms.  Measure R26 from U5 pin 5 to ground and R27 at U5 pin 3 to
>> ground.
>>
>> Then go through the nulling process followed by the power setting
>> process that I outlined in my prior email.
>>
>> 73,
>> Don W3FPR
>>
>> On 4/9/2020 3:25 PM, Christophe aufacf wrote:
>>> Good morning all ,
>>>
>>> Zero adjustment of SWR bridge (C1) page 48
>>>
>>> as you see on the video , I set the K2 to 5Watts
>>>
>>> https://we.tl/t-MOz5AX1v3l
>>>
>>> I managed to adjust the SWR the K2 announces my power at 0.1 Watts !!
>>>
>>> the consumption goes from 0.32 Amps in Rx, in Tune mode 0.5 amps
>>>
>>> I should have 5 Watts
>>>
>>> Thank you for your help
>>>
>>> # K2 7369 - kpa 100 in progress
>
>