[Elecraft] Adjust ALC in Data A mode, with KX3

[James Bennett]

David,

I use my KX3 to run WSPR, JT65, and JT9, using DATA-A. It does take a bit of trial and error, but once you find the “golden settings” between the KX3 and your sound card, things will be fine. I use a Tascam US-125M sound card; its output controls are set to about the 1:00 mark. With them like that, the KX3 gives me 4-5 bars of alc indication when set to about number 9.

Keep trying and you’ll get it going!

Jim / W6JHB


> On   Saturday, Dec 10, 2016, at  Saturday, 7:03 AM, Don Wilhelm <donwilh at embarqmail.com> wrote:
> 
> David,
> 
> The most likely problem is that you have too much output from the sound card.
> 
> Try putting a 10 dB attenuator in the cable between the soundcard and the KX3 MIC input - 100k in series with 10k from the KX3 end of that resistor to the shield should do nicely.
> 
> The KX3 has an audio protection mechanism that kicks in if there is too much audio, and that makes the MIC level an unreasonable value.
> 
> 73,
> Don W3FPR
> 
> On 12/10/2016 6:00 AM, David Douglass wrote:
>> Hi,
>> 
>> I've just re-acquired a KX3, and have been trying it on JT65.
>> 
>> As per recommendations I have been trying to use Data A mode, but trying to adjust the drive level is a nightmare, and getting the required 4-5 bars of ALC has been near impossible. If I switch to USB mode, I can set the drive levels without issue using the mic gain, and adjusting the sound are levels.
>> 
>> I would have assumed that setting drive levels would be the same in USB mode as it was in Data A mode. Is this not the case or do I having something else going on.
>> 
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