[Elecraft] K3 - Sub RX audio to right Line Out SOLVED

[Buck - k4ia via Elecraft]

In the interest of future readers, here is what I found.

I had the LIN OUT menu item set to NOR 10 as recommended.  In fact, they 
warn of going over that level.  However, when you turn on the SUB RX, 
the signal is split and you lose 3db.  This can be heard in the 
headphones.  It seems it also affects the Line Out.

When I increased the LIN OUT level to 35, the Sub Rx could be heard in 
the right channel of the Line Out.  I have no idea how linear the LIN 
OUT level setting is but I suspect that increase to 35 is what was 
needed to overcome the attenuation that occurs when the Sub Rx switches in.

Now the issue is, the output seems unbalanced with the Main Rx signal on 
the left channel of the Line Out jack being louder than the Sub Rx 
signal on the right channel.   I am able to compensate for this by 
turning down the Main Rx gain control on the MicroHam MKII.  I wasn't 
able to even them out with the RF Gain control on the K3 but I will play 
around with that some more.


Buck
k4ia

On 4/29/2014 11:43 AM, Buck - k4ia via Elecraft wrote:
> Joe - that is what I have set up.  If I turn on the Sub Rx and plug a 
> set of headphones directly into the K3 Line Out jack in the back, I 
> hear audio on the left channel only. So I don't think it is the MH 
> cable pigtail.  The problem seems to be in the K3.
>
> Sub Rx works fine in the headphone jack on the front.  This is the 
> first time I have tried to listen to the Sub Rx through the rear Line 
> Out jack.  I was hoping it was a menu setting I was missing. I will 
> check L2.  I guess you are telling me it could be "open?" Why would 
> that happen?
>
> Buck
> k4ia
>
> On 4/29/2014 9:50 AM, Joe Subich, W4TV wrote:
>> Buck,
>>
>> Where (how) are you connecting between the K3 and MK II?
>>
>> You should use a the stereo audio cable supplied with MK II to connect
>> the 3.5mm "pigtail" on the LINE OUT plug of the DB3-EL-K23 or K3R
>> cable set to the "Sub RX" jack on the back of MK II.
>>
>> Sub RX audio is present *only* when the "SUB" icon is displayed on
>> the K3 display (DUAL or DIVERSITY).  If the Sub RX is on and you
>> have audio in right headphone connected to the headphone jack but
>> no audio in the right channel (ring) of the LINE OUT (or tip of the
>> pigtail on the DB37-EL-K23/K3R) I would check L2 on the KIO3 Audio
>> I/O board.
>>
>> Check for audio directly at the LINE OUT jack and at the "pigtail"
>> in case you've snagged the pigtail and broken a wire in either jack.
>>
>> 73,
>>
>>    ... Joe, W4TV
>>
>>
>> On 4/29/2014 8:22 AM, K4ia via Elecraft wrote:
>>>   I played with that setting to no avail.   I am going into a Microham
>>> KeyerII which has a separate audio line for the Sub Rx.  If I plug
>>> headphones into the Line Out jack on the back of the K3, I hear signals
>>> on the left side but nothing on the right so I am convinced it is the
>>> output from the K3 that is missing, not an issue with the computer 
>>> or MKII.
>>>
>>>
>>> Buck
>>> k4ia
>>> K3# 101  KX3 #715
>>>
>>> On 4/29/2014 8:05 AM, Sam Morgan wrote:
>>>> hmmm, what is your Line Out set to?
>>>> mine is the recommended 010
>>>> also is the computer a desktop or laptop?
>>>>
>>>> On 4/29/2014 6:47 AM, K4ia wrote:
>>>>> Thanks Sam but that isn't it.  I get the Sub RX audio just fine in 
>>>>> the
>>>>> headphones.
>>>>>
>>>>> What I am missing is the Sub Rx on the right channel of the Line Out
>>>>> jack on the back of the radio.
>>>>>
>>>>> Buck
>>>>> k4ia
>>>>> K3# 101  KX3 #715
>>>>
>>>
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