[Elecraft] K3: re CW ID macro on SSB

[Joe Subich, W4TV]

Since the K3 generates SSB via DSP and has *no* carrier leakage,
it would be legal.  However, don't try it with an analog modulator
since many of them have less than 40 dB of carrier and opposite
sideband suppression on their best days.

I believe the requirement for spurious suppression (non essential
frequencies, including carrier and opposite sideband) is 27 dB
plus some multiple of Log(power)).   Unfortunately, I haven't
looked for the exact reference recently.

73,

    ... Joe, W4TV


On 2/15/2011 11:34 AM, Tom Hammond wrote:
> Actually, it's NOT actually 'illegal'... BUT... you MUST use SSB, and
> you MUST have every well-suppressed carrier.  I don't recall the
> exact amount of carrier suppression that's required, but it must be
> essentially negligible, thus, the tone is transmitted AS the CW
> carrier and the suppressed carrier is low enough that you won't hear it.
>
> Collins, and a couple others which didn't offer CW mode, used to use
> a small plug-into-the-mic-jack sine wave oscillator which could be
> keyed and which would allow CW to be sent cleanly... in SSB mode.
>
> 73,
>
> Tom   N0SS
>
>
> At 10:25 AM 2/15/2011, w5ov at w5ov.com wrote:
>> At one time that was illegal - is it still?
>>
>>
>>> But that would get you a SSB transmission modulated with a tone. Not a
>>> CW transmission.
>>>
>>> Mark  AD5SS
>>>
>>>
>>> On Tue, Feb 15, 2011 at 10:32 AM,<nr4c at widomaker.com>  wrote:
>>>> any chance of recording the CW audio on a DVR and replaying and
>>>> recording into one of the memories with the K3 DVR?  then jkust play
>>>> it back on the air.
>>>>
>>>> ...bill nr4c
>>>>
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