[Elecraft] How effective is VFO -B (SUB) receiver?

Mike K2MK k2mk at comcast.net
Tue Feb 21 08:59:25 EST 2012


Vince, a few additional thoughts.

I wasn't 100% sure which settings got transferred when you press A-B twice
(button #3). I knew that frequency, mode, and filter settings transfered but
I was pleased to see that the NR settings, NB settings, and the
preamp/attentuator settings do transfer. This stresses the importance of
performing this operation when planning to operate split. It goes that extra
step to insure that the main and sub receiver are set up in an identical
manner.

Macros can be very useful for performing multiple button pushes but I think
it is important to understand what is required prior to designing a macro.

73,
Mike K2MK



Mike K2MK wrote
> 
> Hi Vince,
> 
> The quality and strength of my main and sub receivers are identical. There
> are several ways in which your setup could be amiss. You can align many of
> these with macros but lets just look at manual settings for now. I'll
> assume that you are using headphones. The first step would be to press A-B
> twice. This will duplicate the settings from VFO-A to VFO-B. Next you must
> make make sure that your antenna selection and preamp/attenuator settings
> are identical. There are several ways to observe this which you should
> review in the manual. You also should make sure that the concentric RF
> gain knobs are set the same.
> 
> There are two settings that will affect the audio level in the left and
> right ears. First there is a menu setting that determines if the
> concentric audio knobs independently control the amplitude of VFO-A and
> VFO-B or if they act to balance the audio between A and B. This is
> CONFIG:SUB AF.
> 
> The other setting is CONFIG:L-MIX-R. This is a little tricky to find in
> the configuration menu. It's listed alphabetically under MIX. Using this
> setting you can do the simple thing of having VFO A in the left ear and
> VFO-B in the right ear or you can have numerous other settings. Perhaps if
> you were to choose VFO-A in the left AND right ear and VFO-B only in the
> right ear your brain might perceive that VFO-A is louder than VFO B. 
> 
> You should also probably make sure that your configuration settings are
> correct for your installed filters. This can be done from the K3 Utility.
> 
> If all of these items fail to help you should definitely contact tech
> support.
> 
> 73,
> Mike K2MK
> 
> 
> 
> Vince wrote
>> 
>> Might some reader who uses (1) K-3, (2) KAT-3, the ATU and (3) the KRX3,
>> VFO-B (SUB receiver) tell me how well the second receiver does its job?
>> 
>> Is the quality and strength of sound from VFO-B comparable to VFO-A when
>> operating split?
>> 
>> What EXACT settings do you use for receiving on ANT 1 via VFO-A and
>> transmitting (up two!) using VFO-B for transmitting AND receiving in
>> SPLIT...and using the same antenna.  Not using AUX antenna?
>> 
>> My FT1000d gives me essentially the same audio on the left channel as in
>> the right channel in split.
>> 
>> With my K3 I have very low audio from the SUB VFO-B.
>> 
>> Am I expecting too much from the K3?  Am I missing something in setting
>> up the K3?
>> 
>> Vince, W1IDL
>> 
> 


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