[Elecraft] line in and out/ Microham problem SOLVED

[Eric]

Hi,


The problem not being able to see audio from the K3 3,5 mm jack is solved.

Cause:

1- PC board with female 3,5 mm jacks in KIO3 was NOT 100 % seated, 
due to soldering points on the main KIO board . These points belong 
to a gnd reference loop on the other side of the board, I clipped 
them flush.  Now the "jack" board is 100% seated, the female jacks 
are now exactly flat against the back plane of the K3. Seems only 
minimal misalignment is enough to cause problems in this area.

2- According to Joe Subich  Elecraft seems to have changed it's 
designation from PC-in and PC-out to LINE in and LINE out. Microham 
labeled the 3.5 mm jacks matching the now non-existing variant , 
causing some misunderstanding here. But it still didn't 
work...  After a little bit of measuring of the complex cable from K3 
to the Microham keyer with my Fluke it turns out  everything seems to 
work when the Microham PC-in labeled jack is in the LINE-out female 
jack on the K3.
So the LINE-in jack on the K3 has now the PC-out from Microham 
plugged in.  At this moment you will not be able to find the 
schematic of the K3 cable on the Microham website. However if you get 
to the HELP section in the Microham USB Device Router 5.1.1 software 
on your PC you can click download documents and there you'll find the 
schematic.


vy 73 Eric PA3CEV


































OLD:
Hi,

Anyone else also having problems with the Microham K3 cable? Mine 
does with the line-in line-out jacks, they don't make a good contact.

Is there a difference between 3,5 mm jacks and the US equivalent?



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