[Elecraft] Carrier breakthru using SSB filter

Mon Dec 1 12:26:10 2003

Yes Sverre.... I'm hearing a lot of USB and LSB CIO and a little CW.///...
I'm about to whip D4 out to see if that removes it..... no effect removing
D4 so it is not via the bal mod.

Now, that does leave me stumped!!

Ian

----- Original Message ----- 
From: "Sverre Holm" <[email protected]>
To: "'Ian Keyser'" <[email protected]>; <[email protected]>
Sent: Monday, December 01, 2003 4:57 PM
Subject: RE: [Elecraft] Carrier breakthru using SSB filter

> Ian,
>
> I also have the feeling that there is some leakage here. A related
> effect is that which TF3MA did a mod for: a filter on the 153 kHz AGC
> frequency to make it more narrowbanded. Go to the General mods of
> www.qsl.net/la3za/K2/mod.html and you will find it. It certainly helped
> decrease my S-meter setting when using the OP1 filter.
>
> If you have a longwave receiver and set it to 153 kHz and put its bar
> antenna outside the K2, to the right of the front panel (near the AGC
> circuit) you will hear the activity on the 153 kHz signal. If you set it
> to an AM station you hear the audio, but I am hearing a constant beat
> note there also, which could be the BFO leaking into the system and
> beating with the AM station's carrier. It has not been something that
> has concerned me very much, but I was reminded of it when you brought
> this issue up. It would be very interesting to know if others are
> hearing it also.
>
> --
> 73,
> Sverre
>
> ------------------
> Sverre Holm, LA3ZA
> www.qsl.net/la3za
>
>
>
> > > ----- Original Message -----
> > >
> > > > When switching to OP1 filter I get four bars up on the |S meter
> > > > caused by
> > > > BFO pickup.... switch back to 2.5KHz CW fiter and it goes.   This
> is on
> > > both sidebands.
> > > >
> > > > Anyone else had this effect and if so, how did you cure it
> > > >
>
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