[Elecraft] Carrier breakthru using SSB filter

[Ian Keyser]

No, Don, first thing I tried!

Cathode of D4 is very sensitive to it, touch that and we go end stop on the
S meter.   I've just cut a little board as a screen to cover the underside
of the board from the edge of the crystal filter to C23 (pin 2 bal mod) and
it has not made any difference, so to me that indicates it's on board.   I
next lifted L1 thinking that must be the path... no it isn't! still four
leds up!!



These are the last two problems, the other being lowish output power with
high current... still have not started on that one yet!

Ian
----- Original Message ----- 
From: "Don Wilhelm" <w3fpr@peoplepc.com>
To: "Ian Keyser" <ian.keyser@btopenworld.com>; <elecraft@mailman.qth.net>
Sent: Monday, December 01, 2003 2:37 PM
Subject: Re: [Elecraft] Carrier breakthru using SSB filter


> Ian,
>
> Sounds to me like your BFO is aligned within the passband of the OP1
filter
> allowing carrier and opposite sideband energy to pass through the filter.
>
> It is very likely that the BFOs associated with your SSB filters have not
> yet been aligned to the OP1 filter passband.  If you have the stock K2 SSB
> filter, set the BFO so that the passband is centered between 300 Hz and
2300
> Hz.
>
> If you need additional information about how to do accomplish that feat,
> refer to my webpage (www.qsl.net/w3fpr) article on Dial Calibration.  Step
3
> deals with CAL PLL and filter/BFO alignment.
>
> 73,
> Don W3FPR
>
> ----- 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
> >
> > Ian, G3ROO
>
>
>