[Elecraft] Re: Elecraft Digest, Vol 20, Issue 10
Fred Bonavita
k5qlf at yahoo.com
Sat Dec 10 17:28:59 EST 2005
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> Today's Topics:
>
> 1. Polar Bear MoonLight Madness Event Dec 17th (Ron
> Polityka)
> 2. Re: RE: [Elecraft] K2 BFO Test (Don Brown)
> 3. RE: RE: [Elecraft] K2 BFO Test (Don Wilhelm)
> 4. K2 (Jim Sheldon)
> 5. Hakko 808 users ? (Tom Hall)
> 6. Re: Hakko 808 users ? (Don Brown)
> 7. Selling Unused K2s (David Gordon)
> 8. Re: Hakko 808 users ? (Laurie Landry)
> 9. RE: K2/100 RFI problem using Astron 20A (Todd
> Fonstad)
> 10. Re: Hakko 808 users ? (giantbug at earthlink.net)
> 11. XG1 LEDS (Chris Page)
> 12. Polar Bear Interview on ARNL! (Edward R. Breneiser)
> 13. Re: XG1 LEDS (David Pratt)
> 14. Looking for Begali Simplex Mono Key (NZ8J)
> 15. Re: Hakko 808 users ? (Robert McGwier)
> 16. Re: Hakko 808 users ? (Lynn Burlingame)
> 17. KSB2 Firmware doubt (Vicen?)
> 18. Ground system Radials, works with K2's! (Tom
> Bosscher)
> 19. Re: Somewhat high transmit current K2 (Lambs, Dick
> & Judy)
> 20. RE: Somewhat high transmit current K2 (Don
> Wilhelm)
>
>
>
----------------------------------------------------------------------
>
> Message: 1
> Date: Fri, 09 Dec 2005 06:34:09 -0500
> From: "Ron Polityka" <wb3aal at verizon.net>
> Subject: [Elecraft] Polar Bear MoonLight Madness Event
> Dec 17th
> To: ".Elecraft" <elecraft at mailman.qth.net>
> Message-ID: <002501c5fcb4$79a115c0$0300a8c0 at WB3AAL>
> Content-Type: text/plain; format=flowed;
> charset=iso-8859-1;
> reply-type=original
>
> Hello,
>
> The December full moon is quickly coming upon us. The
> Polar Bears are
> planning to go out on December 17th for their Moon Light
> Madness run.
>
> Check out the latest Amateur Radio Newsline for the
> interview with Ron,
> WB3AAL, about the Polar Bear Moon Light Madness events.
> http://www.arnewsline.org/
>
> You can hear just the interview with Ron at the EPA QRP
> Club web site,
> www.n3epa.org and click on the Polar Bear Event link. If
> you are interested
> in the event click on the December 2005 PB Trip.
>
> For QSL information please click on the December Link.
>
> 72 and Thanks,
> Ron Polityka
> WB3AAL
> www.wb3aal.com
> www.n3epa.org/
>
> K1 - SN 01011
> K2 - SN 01392
>
>
>
>
> ------------------------------
>
> Message: 2
> Date: Fri, 9 Dec 2005 07:56:21 -0600
> From: "Don Brown" <DolfinDon at msn.com>
> Subject: Re: RE: [Elecraft] K2 BFO Test
> To: <w3fpr at arrl.net>, <svholm2 at broadpark.no>,
> <elecraft at mailman.qth.net>
> Message-ID:
> <BAY106-DAV559FCA3C498DCE8975355A6450 at phx.gbl>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hi Don and All
>
> I have used this method on 3 or 4 of the K2's I have
> built. I use a 1pF or
> 2pF NPO cap to lower the bottom end of the range to get
> it to meet the spec.
> I agree with you on pulling the crystal much with this
> method. I would not
> recommend cap values above maybe 3 or 4 pF. I have never
> needed more than 1
> pf. Padding C173 and C174 is a better method if the radio
> needs more than 1
> or 2 pf. I believe this method was suggested by Gary at
> Elecraft some time
> back. At any rate it is a little easier to do than the
> padding or change out
> of C174 and C173
>
>
> The other Don
>
> Don Brown
> KD5NDB
>
>
>
> ----- Original Message -----
> From: "Don Wilhelm" <w3fpr at earthlink.net>
> To: <svholm2 at broadpark.no>; <w3fpr at arrl.net>;
> <elecraft at mailman.qth.net>
> Sent: Thursday, December 08, 2005 5:03 PM
> Subject: RE: RE: [Elecraft] K2 BFO Test
>
>
> > Sverre,
> >
> > I have not tried that small capacitor from the junction
> of the crystals
> > and
> > L33 so I cannot comment on it from that standpoint.
> >
> > What I would like to state is that when one pulls a
> crystal by any method,
> > the stability becomes worse as the amount of pulling
> becomes greater. One
> > should be aware of this and related facts when
> modifying any circuit in a
> > way that is not 'approved and tested'. Also due to the
> nature of
> > crystals,
> > something that happens to work in one situation may not
> work the same for
> > all cases. Remember that I am only bringing up
> cautions here, I am not
> > makeing a firm statement about the operation one way or
> another.
> >
> > It certainly would be nice if someone (or better yet,
> several someones)
> > with
> > access to suitable instrumentation could try this or
> any other mod and
> > report the results. The fact that it worked on a
> sample of one does not
> > create a statement that it will work in other cases -
> that is simple
> > statistical knowledge - I would like to see something
> that says it works
> > in
> > at least 5 or 10 trials before drawing any firm
> conclusions.
> >
> > So, yes I think it should be left on your website, but
> you may want to put
> > a
> > "Use at your own peril" disclaimer on all those that
> are not 'approved by
> > Elecraft' or otherwise adequately tested (and I invite
> you to add any of
> > my
> > mods to that group as well, even though I have absolute
> confidence in my
> > own
> > work).
> >
> > 73,
> > Don W3FPR
> >
> > > -----Original Message-----
> > > >
> > > > The preferred method of padding the BFO capacitors
> is to
> > > > maintain the ratio between C173 and C174 by
> paralleling them
> > > > with capacitors. A single capacitor from the
> junction to
> > > > ground will be in parallel with the series
> combination of
>
=== message truncated ===
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