[Elecraft] Bad KSYN3A SYNTHESIZER

[Nr4c]

How about just telling the radio that KRX3 is Not Installed and remove the bad synth board until it is replaced?

Sent from my iPhone
...nr4c. bill


> On Feb 21, 2016, at 8:23 AM, Bruce Osterberg <n9bx73 at gmail.com> wrote:
> 
> Good Morning:
> 
> I called Elecraft Tech. support on Friday because my K3 2nd Receiver was not Working.  Howard gave me some great Advice on how to test it Using WWV and sent me a small procedure to verify if I could get it working.  Unfortunately it did not work.  I forgot to tell Howard that I had the New KSYN3A SYNTHESIZER boards installed.  I suspect one of these boards has now went bad or was bad from the beginning. On page 16 of the KSYN3A SYNTHESIZER Manual figure 13 shows how the Main and Auxiliary  KSYN3A SYNTHESIZER boards are interconnected.  I had this correct, and all wiring was per figure 13.  Now main receiver is OK and working Fine. when I touched the DISP button on the K3 I could scroll through the K3 parameters and it showed that KYS1 is OK and KYS2 is OK.  Current Draw per meter in K3 was 1.05A.
> 
> Well Since I had two Boards, I figured I would swap them, so I changed position of the two KSYN3A SYNTHESIZER boards, reconnected the cables.  Main Receiver is now dead with only white noise.  Sub receiver dead also as before.  I pushed the DISP Button and noticed that the current draw was now 1.4 amps, and the KYS1 and KYS2 were gone!  No indication they were installed.
> 
> Put boards back to original position, main receiver working OK, Sub receiver still nothing.  when DISP button Pushed KYS1 and KYS2 showed up again as OK, and current draw back to 1.05 Amps.
> 
> I believe the Auxiliary  KSYN3A SYNTHESIZER board is bad.  I could test further and set the K3 back up as a single Transceiver with no Sub.  But that would mean taking out the Sub, Installing a Jumper on the input connector for the Sub and removing one of the Synthesizer boards and setting the K3 up as a single  KSYN3A SYNTHESIZER as per figure 12 on Page 15 of the KSYN3A SYNTHESIZER Manual.  I hesitate to do this a removing the Sub and reinstalling it is always a pain. I'll call Elecraft on Monday Morning and see if they also think the auxiliary KSYN3A SYNTHESIZER Board is Bad.
> 
> Sorry For long Post.  Bruce N9BX 73
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