Heathkit SB-102 LSB problem

[Mark Graalman WB8JKR]

  I've corrected this problem in my 301 exactly the
same ay I did in the HW/SB article, the only difference
is the capacitors are on a terminal strip instead of a
circuit board due to the way the 301 is built.
 You'll also notice much nicer audio from your
300/301 if you change capacitors C243 and C256
from .001 ufd to .005 ufd.

Mark  WB8JKR

On Mon, 22 Nov 2004 09:29:10 -0500 "Schichler, Alfred"
<ASchichler at microwavedata.com> writes:
> I have a similar problem with my SB-301. It's not very severe, but
> the audio
> sounds more tinny on one sideband than it does on the other. I was
> wondering
> if there are any articles about fixing this or similar problems with
> the
> SB-301.
>
> Thanks,
> Al Schichler
>
> -----Original Message-----
> From: Mark Graalman WB8JKR [mailto:wb8jkr at JUNO.COM]
> Sent: Friday, November 19, 2004 11:15 AM
> To: HEATH at LISTSERV.TEMPE.GOV
> Subject: Re: Heathkit SB-102 LSB problem
>
>
>  You should see NO signal at the plate of V16
> the plate is grounded for RF. The BFO output
> is taken from the cathode and in LSB you should
> see about 3396.6 Khz. As little as a 50 hz shift
> of both crystals can cause a noticable difference
> in the audio passband response. If you can I
> suggest reading the article on optimizing the
> SB/HW series transceivers in the Feb 2003
> QST, if you don't have access to it I can E mail
> you a .PDF file of it.
>
> 73,  Mark WB8JKR
>
>
> On Fri, 19 Nov 2004 13:16:07 +0000 dmurman at VERIZON.NET writes:
> > I have picked up a Heath SB-102 transceiver and noticed that the
> LSB
> > sounds real tinny.  I suspect it is the LSB crystal.  What
> frequency
> > should I see at the plate of V16B.  Would that be the crystal
> > frequency?
> >
> > USB sounds A-OK.
> >
> > Thanks;
> > David
> > WA4ECM

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