Question on filters/ possible problem

[John Harper AE5X]

I just finished my K3, at least to the point of doing the pre 100W PA alignments: Synth cal, filter set-up, ref osc & tx gain cals are all done.

I did the filter set-up via the K3 menu, then verified with the K3 utility program. I have the standard 2.8 kHz and the 8-pole 400 Hz filters.

The problem I have is when adjusting the bandwidth to the point where the 400 Hz filter comes in - as soon as that happens, the receiver seems to go dead. Whoever I was listening to disappears and background noise goes waaay down...almost silent. I've dialed in both 1 and 8 dB gain for the 400 Hz filter but niether has any effect.

Any suggestions? Thanks,

John Harper AE5X



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[Brett Howard]

Are you sure you've got the 400Hz filter in the slot that you told the
radio you put it into?  If you've only double checked check two more
times! ;)

~Brett

On Mon, 2010-03-08 at 20:10 -0600, John Harper wrote:

> I just finished my K3, at least to the point of doing the pre 100W PA alignments: Synth cal, filter set-up, ref osc & tx gain cals are all done.
>
> I did the filter set-up via the K3 menu, then verified with the K3 utility program. I have the standard 2.8 kHz and the 8-pole 400 Hz filters.
>
> The problem I have is when adjusting the bandwidth to the point where the 400 Hz filter comes in - as soon as that happens, the receiver seems to go dead. Whoever I was listening to disappears and background noise goes waaay down...almost silent. I've dialed in both 1 and 8 dB gain for the 400 Hz filter but niether has any effect.
>
> Any suggestions? Thanks,
>
> John Harper AE5X
>
>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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>
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[John Harper AE5X]

Yep, I've quadruple-checked: the 2.8 kHz is in FL1, the 400 Hz is FL2.

Maybe I should move them both over one slot and see if the symptoms change.

John Harper AE5X



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[John Harper AE5X]

Thanks to all who replied - brain fart here. I dialed the offset into the
400 Hz filter instead of the 2.8...

All is well now!

John Harper AE5X




----- Original Message -----
From: "Brett Howard" <[hidden email]>
To: "John Harper" <[hidden email]>
Cc: <[hidden email]>
Sent: Monday, March 08, 2010 8:18 PM
Subject: Re: [Elecraft] Question on filters/ possible problem

> Are you sure you've got the 400Hz filter in the slot that you told the
> radio you put it into?  If you've only double checked check two more
> times! ;)
>
> ~Brett
>
> On Mon, 2010-03-08 at 20:10 -0600, John Harper wrote:
>> I just finished my K3, at least to the point of doing the pre 100W PA
>> alignments: Synth cal, filter set-up, ref osc & tx gain cals are all
>> done.
>>
>> I did the filter set-up via the K3 menu, then verified with the K3
>> utility program. I have the standard 2.8 kHz and the 8-pole 400 Hz
>> filters.
>>
>> The problem I have is when adjusting the bandwidth to the point where the
>> 400 Hz filter comes in - as soon as that happens, the receiver seems to
>> go dead. Whoever I was listening to disappears and background noise goes
>> waaay down...almost silent. I've dialed in both 1 and 8 dB gain for the
>> 400 Hz filter but niether has any effect.
>>
>> Any suggestions? Thanks,
>>
>> John Harper AE5X
>>
>>
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>
>

--------------------------------------------------------------------------------



No virus found in this incoming message.
Checked by AVG - www.avg.com
Version: 8.5.436 / Virus Database: 271.1.1/2731 - Release Date: 03/08/10
19:33:00

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[Brett Howard]

The 2.8 and 400 are both 8-pole filters so no offset should be needed
for them...

~Brett

On Mon, 2010-03-08 at 21:46 -0600, John Harper wrote:

> Thanks to all who replied - brain fart here. I dialed the offset into the
> 400 Hz filter instead of the 2.8...
>
> All is well now!
>
> John Harper AE5X
>
>
>
>
> ----- Original Message -----
> From: "Brett Howard" <[hidden email]>
> To: "John Harper" <[hidden email]>
> Cc: <[hidden email]>
> Sent: Monday, March 08, 2010 8:18 PM
> Subject: Re: [Elecraft] Question on filters/ possible problem
>
>
> > Are you sure you've got the 400Hz filter in the slot that you told the
> > radio you put it into?  If you've only double checked check two more
> > times! ;)
> >
> > ~Brett
> >
> > On Mon, 2010-03-08 at 20:10 -0600, John Harper wrote:
> >> I just finished my K3, at least to the point of doing the pre 100W PA
> >> alignments: Synth cal, filter set-up, ref osc & tx gain cals are all
> >> done.
> >>
> >> I did the filter set-up via the K3 menu, then verified with the K3
> >> utility program. I have the standard 2.8 kHz and the 8-pole 400 Hz
> >> filters.
> >>
> >> The problem I have is when adjusting the bandwidth to the point where the
> >> 400 Hz filter comes in - as soon as that happens, the receiver seems to
> >> go dead. Whoever I was listening to disappears and background noise goes
> >> waaay down...almost silent. I've dialed in both 1 and 8 dB gain for the
> >> 400 Hz filter but niether has any effect.
> >>
> >> Any suggestions? Thanks,
> >>
> >> John Harper AE5X
> >>
> >>
> >>
> >> ______________________________________________________________
> >> Elecraft mailing list
> >> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> >> Help: http://mailman.qth.net/mmfaq.htm
> >> Post: mailto:[hidden email]
> >>
> >> This list hosted by: http://www.qsl.net
> >> Please help support this email list: http://www.qsl.net/donate.html
> >
> >
>
>
> --------------------------------------------------------------------------------
>
>
>
> No virus found in this incoming message.
> Checked by AVG - www.avg.com
> Version: 8.5.436 / Virus Database: 271.1.1/2731 - Release Date: 03/08/10
> 19:33:00
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

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