[Elecraft] AM operation of the K line

[W2xj]

It’s not the best idea to use RF filtering to limit audio bandwidth. 

Sent from my iPhone

> On Dec 9, 2018, at 17:43, Grant Youngman <ghyoungman at gmail.com> wrote:
> 
> I don’t think the AM transmit bandwidth relies on the filter to set its limits.  Even with the 13KHz filter, bandwidth is limited by the DSP.  The option to use the 13KHz filter was, as I recall, a change made by Elecraft quite some time ago.  While there are many opinions, there is no bandwidth specified by 97.101(a), and at its worse, it’s tighter than most of the vintage and other modern AM gear in use legally on the amateur bands.
> 
> Grant NQ5T
> K3 #2091 KX3 #8342
> 
>> On Dec 9, 2018, at 8:26 PM, Bob McGraw K4TAX <rmcgraw at blomand.net> wrote:
>> 
>> Yes true, however I don't suggest using the 13 kHz filter for AM transmit in view of transmit bandwidth considerations.    The 6 kHz filter is more appropriate and thus does limit the transmit bandwidth to the required limits of the regulations.  97.101(a)
>> 
> 
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