[Elecraft] Bad crystal filter ?

[Joe Subich, W4TV]

> The Pitch is 650 Hz on the K3S. And the Mark for RTTY is the
> standard2125 Hz.

PITCH should be set to the same as MARK in RTTY.

73,

   ... Joe, W4TV


On 9/19/2015 12:49 AM, James C. Hall, MD wrote:
> In response to W4TV Joe's question:
>
> The frequency offset for the 8-pole crystal filter is 0.00 Hz.
>
> The Pitch is 650 Hz on the K3S. And the Mark for RTTY is the standard 2125 Hz.
>
> I've got a new 400 Hz filter on its way so I'll see what the problem is. I just hope it's not an RF board. I took ESD precautions very seriously while building it so, fingers crossed.
>
> 73, Jamie
> WB4YDL
>
> Sent from my iPad
>
>> On Sep 18, 2015, at 2:30 PM, James C. Hall, MD <heartdoc at nwtcc.com> wrote:
>>
>> Working with my newly constructed K3S today, I noticed that receiving through the FL4 crystal filter (400 hz, 8-pole) was noticeably suppressed. Through the FL3 (1.8 kHz) filter, an RTTY signal would be nice and strong with good S-meter indications. Going to 400 Hz the signal would nearly be lost and I could not decode it. Going to FL5 (250 Hz), the S-meter would pick up again with strong signals.
>>
>> There's not much to check on the Config menu except the FL4 GN and it's at max (8 db) - not much change.
>>
>> Is there something else I should do to deal with this ?
>>
>> 73, Jamie
>> WB4YDL
>>
>> Sent from my iPad
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