[Elecraft] K3 VFO Tuning noise reduction

James Sarte k2qi.nyc at gmail.com
Fri Aug 14 11:47:03 EDT 2009


Yup, makes sense now.  Thanks for the clarification.

73 de James K2QI

On Fri, Aug 14, 2009 at 10:27 AM, Stewart <stewart at baker.nildram.co.uk>wrote:

> No, you still have the diode and resistor in series.
>
> However as the each of the vias go to pads 15 & 20 of the
> connectors respectively, soldering to the pads is an alternative
> to soldering to the vias.
>
> You can check the continuity with a VOM just to make sure.
>
> Hope that's OK ?
>
> 73
> Stewart G3RXQ
>
>
> On Fri, 14 Aug 2009 10:14:06 -0400, James Sarte wrote:
> > Solder the components directly to the pads; you mean in parallel
> instead of series???  I'm probably wrong, but I'm having a hard
> time visualizing this for some reason. Please explain.
> >
> > Thanks!
> > James K2QI
> >
> > On Fri, Aug 14, 2009 at 6:29 AM, Stewart
> <stewart at baker.nildram.co.uk> wrote:
> >> I found it easier to solder the components directly to the
> connector pads.
> >>
> >> End result is the same, no more VFO tuning noise on 6m.
> >
> >> 73
> >> Stewart G3RXQ
> > On Fri, 14 Aug 2009 05:20:12 -0500 (CDT), Bill W4ZV wrote:
> >> >
> >> >
> >> > John Lemay wrote:
> >> >>
> >> >> Hello all
> >> >>
> >> >> Has anyone carried out the VFO tuning noise reduction
> modification yet ?
> >>>
> >> >> The photo is a little unclear (or maybe it's my eyes) - it
> looks as though
> >> >> one resistor-diode combination has the anode connected to
> the resistor and
> >> >> the other pair has the cathode connected to the resistor.
> Have I got this
> >>> right ?
> >> >>
> >> >
> >> > Yes that's correct...note the orientation of the black band
> on the diodes.
> >> > I first soldered the resistor-diode combination at
> approximately the same
> >> > acute angles in the photographs.  Then align the ends so that
> they match the
> >> vias on the PC board.  After soldering I checked the resistance
> between pins
> >> > 15 and 20 on the connectors.  I got ~800k one way and ~5.5M
> the other.
> >> >
> >> > 73,  Bill
> >
> >
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-- 
73 de James K2QI


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