[Elecraft] Re: VK2ICQ: RE: BFO settings?

[David Walker]

Hi Garry,

Thanks for the tip.... I've downloaded spectrogram before and its gone past
it's demo period so it won't work for me.  However, I used JE3HHT's DSP
filter because it shows the same thing as spectrogram - and it's FREE!

My filters for SSB were perfect but my CW filter's were very skewed.  I have
them perfect now.

Thanks,

Dave.
----- Original Message -----
From: "Gary" <gary@elecraft.com>
To: "'David Walker'" <vk2icq@dodo.com.au>
Cc: "CSinfo" <csinfo@elecraft.com>
Sent: Tuesday, March 18, 2003 4:27 AM
Subject: VK2ICQ: RE: BFO settings?


> Hi David,
>
> Use the info on our website to do CAL FIL optimally:
>
> General info on Spectrogram, including how to download it:
>
> http://www.elecraft.com/Apps/new_fil_docs/filter_apps.htm
>
> The CW method to adjust CAL FIL:
>
> http://www.elecraft.com/Apps/new_fil_docs/k2_cw_gram.pdf
>
> The SSB method:
>
> http://www.elecraft.com/Apps/new_fil_docs/k2_ssb_gram.pdf
>
> The 2nd XFIL mod we recommend when the SSB adapter is installed:
>
> http://www.elecraft.com/Apps/new_fil_docs/k2_2nd_xfil_ssb_mod.pdf
>
> (not needed on sn. 3000 kits and above.)
>
>
> CAL S LO and CAL S HI often need to be redone whenever CAL FIL is done
> and the BFO is changed.
>
>
> Narrower CW filters will have less fidelity than the wider fixed SSB
> filter, if that is what you mean.
>
>
> --
> 73, Gary AB7MY
> =========
> gary@elecraft.com
> Elecraft Technical Support
> -----Original Message-----
> From: David Walker [mailto:vk2icq@dodo.com.au]
> Sent: Monday, March 17, 2003 1:00 AM
> To: support@elecraft.com
> Subject: BFO settings?
>
>
> Hi guys,
>
> I've have another query about setting up the filters and the BFO
> settings.
>
> I have set my BFO frequencies and filter widths according to the builder
> manual and everything is great.  However, on CW the tone is not as clear
> as on USB or LSB.  It's kind of like listening to the rig with ears full
> of water (if you know what I mean.)  But I can flip to CW-R and notice
> almost no change in the CW signals tone - which is ideal right?
>
> The other thing I notice is that the S meter now shows S2 constantly -
> whereas on USB and LSB the S meter is zero without an antenna connected.
>
> Why would this be?  Do I need to just adjust S_LO and S_Hi or have I got
> wrong BFO values in my CW filter?
>
> Hope this makes sense, I barely know what I'm doing myself.  If you
> think I should telephone and discuss this then let me know I'd be happy
> to phone.
>
> 73's
>
> Dave
> VK2ICQ
> SN: 3222
>
>