[Elecraft] Elecraft K3 Presets/Settings for JT65B / EME

[iain macdonnell - N6ML]

Probably, but even if I shift downwards in DATA A mode, there's still
a cut-off at 200Hz.

    ~iain / N6ML


On Fri, Aug 12, 2011 at 11:47 PM, Guy Olinger K2AV
<olinger at bellsouth.net> wrote:
> Isn't SHIFT remembered separately?     73, Guy.
>
> On Fri, Aug 12, 2011 at 6:28 PM, iain macdonnell - N6ML <ar at dseven.org> wrote:
>> On Fri, Aug 12, 2011 at 10:12 PM, Joe Subich, W4TV <lists at subich.com> wrote:
>>>
>>>  > I just looked at my passband, with spectran, in DATA A and USB modes
>>>  > with the bandwidth cranked up to 4.0kHz (in both cases) with a 2.7kHz
>>>  > filter. Indeed, the passband seems to be cut off at about 200Hz on the
>>>  > low end in DATA A mode, but not in SSB mode. What's that about?
>>>
>>> That should not be a problem since applying modulation (audio tones)
>>> that low will result in "tilt" on transmission in any case.  In my
>>> experimentation with JT65 on HF working below 300 Hz or so resulted
>>> in power output varying with the specific tone even in DATA A with
>>> no TX EQ presumably due to the skirts of the roofing filter on TX.
>>
>> Yeah, I wouldn't suggest transmitting that low in the AF range, but
>> one might be able to decode a received signal down there (then perhaps
>> QSY down 1kHz and call him, if interested).
>>
>> In any case, I find the discrepancy between the passbands of DATA A vs
>> USB modes curious - can anyone (Lyle?) explain it?
>>
>>    ~iain / N6ML
>>
>>
>>
>>
>>> On 8/12/2011 4:52 PM, iain macdonnell - N6ML wrote:
>>>> "DATA A" *is* USB with no equalisation, etc - that's the point. It
>>>> allows you to easily switch between SSB and data modes without having
>>>> to adjust audio processing for each.
>>>>
>>>> I just looked at my passband, with spectran, in DATA A and USB modes
>>>> with the bandwidth cranked up to 4.0kHz (in both cases) with a 2.7kHz
>>>> filter. Indeed, the passband seems to be cut off at about 200Hz on the
>>>> low end in DATA A mode, but not in SSB mode. What's that about?
>>>>
>>>> http://www.dseven.org/ar/passband.png
>>>>
>>>>      ~iain / N6ML
>>>>
>>>>
>>>>
>>>>
>>>> On Fri, Aug 12, 2011 at 8:40 PM,<cqbilld at q.com>  wrote:
>>>>>   I continue to be puzzled by this thread. Given that WSJT (all modes) is WRITTEN for use on USB by Joe Taylor, WHY would we be interested in utilizing any K3 mode but USB?
>>>>>
>>>>>   I have operated 441 and JT65 utilizing my K3 off the Moon, tropo and MS with no desire to fuss with any other K3 "mode". The K3 works great on USB ... end of story.
>>>>>
>>>>>   Here, USB, no equalization, 2.7Khz filter (5 pole), no compression. M Audio Delta 44 Soundcard, XP dual core machine and no "audio" interface and a homebrew Opto-isolator for PTT
>>>>>
>>>>>   In the log::
>>>>>
>>>>>     34 - QSOs JT44
>>>>>    702 - QSOs JT65
>>>>>     35 - QSOs JT6M
>>>>>   1057 - QSOs 441
>>>>>
>>>>>   Many hours of HF WSPR as well.
>>>>>
>>>>>   Not all with the K3 ... but many!!
>>>>>
>>>>>   What am I missing???
>>>>>
>>>>> Respectively, Bill  K0AWU EN37ed ....
>>>>>
>>>>>
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