[Elecraft] 40 meter reciever not tuning

[W3FPR - Don Wilhelm]

Roland,

The speaker plugs into P5 on the RF Board - P5 on the Control Board is for
use with an external probe to the internal voltmeter in the K2 (only active
if the P3 jumper is set for EXT).

If I misunderstood your intent and you were actually referring to P5 on the
RF Board, then your headphone jack likely will not work either.  You should
have continuity between the junction of RF Board R35 and R36 and RF Board P5
with the headphone plug removed.  If you have continuity there AND the
headphone jack has audio, the speaker should work - unless you swapped
conductors  at either the speaker plug or the external speaker jack.

73,
Don W3FPR

> -----Original Message-----
>
> I can tell now that there is continuity from the speaker jack to
> the control
> board.  I don't get continuity from P3 to P5 on the control board.  The
> schematic makes it look like a clean shot.  When I tried to trace
> it on the
> board point to point, I get lost.  Seems like it's going through a lot of
> coponents.  If it is a straight shot, perhaps there is a break in the path
> on the board.  Could I rig a separate jumper wire to P5 from P3?
> Roland in Stockton
> #3090
> ----- Original Message -----
> From: "W3FPR - Don Wilhelm" <w3fpr at earthlink.net>
> To: "Roland" <n5vwn at sbcglobal.net>; "elecraft" <elecraft at mailman.qth.net>
> Sent: Monday, July 25, 2005 8:35 PM
> Subject: RE: [Elecraft] 40 meter reciever not tuning
>
>
> > Roland,
> >
> > I suggest you start by re-checking the VCO voltage readings as specified
> on
> > page 61 of the manual.  At the time they were done, you ahould have had
> all
> > voltages within range.  Ask yourself what has changed in the VCO area
> since
> > that time - the answer would normally be 'nothing'.  You may
> want to tell
> us
> > what the VCO Voltage readings actually are.
> >
> > For your speaker problem, if you know the speaker and external jack are
> OK,
> > the only thing left is the contacts in the headphone jack.  Make certain
> the
> > headphone jack is properly soldered at all pins - they are more
> difficult
> > than most to solder since the pins do not project through the board.  It
> is
> > possible that you can have a bad headphone jack, but check the soldering
> > first.
> >
> > 73,
> > Don W3FPR
> >
> > > -----Original Message-----
> > >
> > > I was told to report back.  Ok,  I told you-all before that 40
> > > meters wasn't tuning except on the display.  Well I thought all
> > > the other bands were tuning.  Looks like 30 meters isn't tuning
> > > around either.
> > > I was told by Don to check left on R30.  I checked and while
> > > tuning noticed that the voltage DID NOT vary.
> > > I don't have a capacitor checker so I don't know about C71 other
> > > than replacing it.  It has a little monolithic cap marked "820"
> > > on it.  All I have around is a disk NPO "82" that I could swap it
> > > out with, is this ok?
> > > I put the rig on 7000 and the freq. probe to TP1 and then CAL
> > > FACTR.  You said it should read 11915.  It reads 11341.  It DOES
> > > NOT change when moving the dial.
> > > On the speaker, No AC detected.  I also jumpered it directly to
> > > the speaker just to check it out.  Nothing.  I jumpered the K2
> > > speaker to my small wonders lab SW+ QRP rig and it works FB.
> > > Thanks,
> > > de Roland in Stockton
> > > #3090 N5VWN
> > >
> > --
> > No virus found in this outgoing message.
> > Checked by AVG Anti-Virus.
> > Version: 7.0.338 / Virus Database: 267.9.4/57 - Release Date: 7/22/2005
> >
> >
>
>
> _______________________________________________
> Elecraft mailing list
> Post to: Elecraft at mailman.qth.net
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
>  http://mailman.qth.net/mailman/listinfo/elecraft
>
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
> --
> No virus found in this incoming message.
> Checked by AVG Anti-Virus.
> Version: 7.0.338 / Virus Database: 267.9.4/57 - Release Date: 7/22/2005
>
--
No virus found in this outgoing message.
Checked by AVG Anti-Virus.
Version: 7.0.338 / Virus Database: 267.9.4/57 - Release Date: 7/22/2005