[Elecraft] 6 Khz filter question

[Don Wilhelm]

Mike,

The K3 audio is limited by a LPF to 4 kHz.
Early on, the K3 audio was wider, but many complained about a high 
frequency "hiss", so the LPF was installed.  (See the early K3 archives).
The WIDTH knob also has always been limited to 4 kHz.
The 6 kHz filter was *intended* for AM use, and a 6 kHz IF width will 
result in an audio width of 3 kHz, so 4 kHz audio width is sufficient 
for that.

You can tune the VFO when switching between JT65-HF and JT9.

73,
Don W3FPR

On 1/2/2016 4:32 PM, Mike Weir wrote:
> Good afternoon all, I have for some time now had the 6 Khz filter installed in my K3. I was just recently on JT-65 in Data A mode and wanted to use the 6Khz filter. I was only able to open the width to 4 Khz using the width knob? I wanted to open it up to 6 khz so I could receive both JT65 and JT9 signals.
> Any ideas
> Mike VE3WDm
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