[Elecraft] K2 SSB

[Rich McCabe]

"There is no direct relationship between the crystals and the caps for the 
2.4 and 2.6 kHz bandwidth filters."

I thought they came at the same time? So its possible to have the "-s" 
crystals in a 2.1 khz setup?

Rich

----- Original Message ----- 
From: "Don Wilhelm" <w3fpr at earthlink.net>
To: "Rich McCabe" <r.mccabe at 1967z28.com>; <elecraft at mailman.qth.net>
Sent: Thursday, March 09, 2006 9:23 PM
Subject: RE: [Elecraft] K2 SSB


> Rich,
>
> There is no direct relationship between the crystals and the caps for the
> 2.4 and 2.6 kHz bandwidth filters.
>
> Sorry to hear about the attenuation - check the soldering and re-check the
> soldering of T1, T2, RFC1 and RFC2.
>
> 73,
> Don W3FPR
>
>> -----Original Message-----
>> From: elecraft-bounces at mailman.qth.net
>> [mailto:elecraft-bounces at mailman.qth.net]On Behalf Of Rich McCabe
>> Sent: Thursday, March 09, 2006 10:11 PM
>> To: elecraft at mailman.qth.net
>> Subject: Re: [Elecraft] K2 SSB
>>
>>
>> Well I dont know :)
>>
>> The manual they sent says revision D and January 2004.
>>
>> This manual shows installing CB and CN and the last one on their
>> site says
>> leave it out. It also calls CG/CH a 47 pf capacitor. According to the new
>> update sheet, only the original 2.1 SSB used a 47 pf cap in CG/CH.
>>
>> So I am confused. This would mean I have -s crystals and old caps !
>>
>> I installed the parts and I obviouslly have something wrong. The
>> OP1 filter
>> is severally attenuationed. It works, but is several DB down from what it
>> should me.
>>
>> Thanks for the response guys. Back to checking things over.
>>
>> 73,
>>
>> Rich
>>
>> ----- Original Message -----
>> From: "Don Wilhelm" <w3fpr at earthlink.net>
>> To: "Rich McCabe" <r.mccabe at 1967z28.com>; <elecraft at mailman.qth.net>
>> Sent: Thursday, March 09, 2006 6:52 PM
>> Subject: RE: [Elecraft] K2 SSB
>>
>>
>> > Rich,
>> >
>> > All I can say is that if you have CB and CN populated, either
>> you have the
>> > 2.1 kHz filter or that you made some mistake in pluging the capacitors
>> > (the
>> > latter not likely since you indicate the capacitors called for in your
>> > manual).  I can confirm that the 49136-S crystals are the new type.
>> >
>> > In any case, all you need to do is change the capacitors to
>> those required
>> > for the new bandwidth and you should be 'good to go'.  I have
>> not compared
>> > the manuals in detail, but as far as I have observed in several KSB2
>> > builds,
>> > the only recent change to the KSB2 manual has been the filter
>> width change
>> > information and the prior errata information has been incorporated into
>> > the
>> > new manual.  Other than the firmware changes to support the
>> K60XV option
>> > and
>> > the addition of the bandwidth information, the KSB2 has been
>> quite stable
>> > for some time.  Whe you finish, you should have no caps in the CB and 
>> > CN
>> > positions.
>> >
>> > 73,
>> > Don W3FPR
>> >
>> >> -----Original Message-----
>> >>
>> >> On a whim, I decided to order the SSB upgrade capacitor kit for
>> >> my K2 Serial
>> >> #4331 as I never have been happy with the SSB audio.
>> >>
>> >> While trying to decipher the tech sheet (installation
>> >> instructions) I notice
>> >> that it shows no caps in place for CB and CN. It was my
>> >> understanding that
>> >> Serial 4331 should have a 2.4 filter setup. My crystals are
>> >> marked with the
>> >> "4.9136-S", so I am assuming its a late kit.
>> >>
>> >> I just pulled out MY manual and it shows installing CB and CN and
>> >> does not
>> >> look like the manual on the Elecraft site that says to leave
>> them out. I
>> >> have no erata sheet with my K2 stuff.
>> >>
>> >> So I am wondering if Elecraft just shipped me an old manual??
>> >>
>> >> Anything else I should look for that has changed between manual
>> >> revisions?
>> >>
>> >> 73,
>> >>
>> >> Rich
>> >> kd0zv
>> >>
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