Re: [Elecraft] Bad crystal filter ?

[Mike K2MK]

Hi Jamie,

I was just looking at the crystal filter configuration menu in the K3
Utility program and I noticed that there are check boxes for enabling the
filters for DATA mode. I don't know if this is for transmit and receive or
just transmit. On my K3 I have this box checked for all of my filters. I
also have all of them checked for CW.

73,
Mike K2MK


James Hall-2 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 





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Re: [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  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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Re: [Elecraft] Bad crystal filter ?

[James C. Hall, MD]

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  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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Re: [Elecraft] Bad crystal filter ?

[Joe Subich, W4TV]

Jamie,

What is the offset (FL# FRQ)?

What is the PITCH in the K3S vs. MARK in your RTTY software?

73,

   ... Joe, W4TV


On 9/18/2015 3:30 PM, James C. Hall, MD 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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Re: [Elecraft] Bad crystal filter ?

[Don Wilhelm]

Jamie,

Is there any chance that you have installed the 400Hz filter backwards.  
Several have reported similar results from that problem.


73,
Don W3FPR

On 9/18/2015 3:30 PM, James C. Hall, MD 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.




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Re: [Elecraft] Bad crystal filter ?

[Jerry Moore]

There's a process in the owners manual for adjusting dB loss compensation for 
the roofing filters. You can see it with the k3 utility

On September 18, 2015 4:57:39 PM EDT, "Joe Subich, W4TV"  
wrote:
>
>Jamie,
>
>What is the offset (FL# FRQ)?
>
>What is the PITCH in the K3S vs. MARK in your RTTY software?
>
>73,
>
>... Joe, W4TV
>
>
>On 9/18/2015 3:30 PM, James C. Hall, MD 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
>> __
>> Elecraft mailing list
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>> Help: http://mailman.qth.net/mmfaq.htm
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>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to li...@subich.com
>>
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