Thanks, I'll check them out. On Tue, Dec 21, 2021, 1:19 PM Don Wilhelm <[email protected]> wrote:
> Edward and Terry, > > The SSBCAPKT was released November 2004. KSB2 kits built before that > had a 2.1 khz filter. > Look at your KSB2 board. If CB and CN positions are populated, you > have the narrow 2.1 khz filter width. > > Download the instructions for the SSBCAPKT > (https://ftp.elecraft.com/K2/Manuals%20Downloads/SSBCAPKT.pdf) and pay > close attention to the 2nd page to see if your BFO range will support > the 2.6 khz width. If not you will have to use the 2.4 kHz width. > You will want to use Spectrogram for alignment - but the link in that > document will no longer work. You can find a good download on my > website www.w3fpr.com - scroll the homepage to near the bottom to find > the links to the files resident on my website. > Position the 'knee' of the low frequency slope of the passband. > See http://www.mmccs.com/mmarc/n0ss/k2_filters_using_gram_v5r17.pdf if > you are not familiar with setup and use of Spectrogram. > > 73, > Don W3FPR > > On 12/21/2021 9:31 AM, Dave Van Wallaghen wrote: > > I am sure Don may be able to answer when the KSB2 came out with a > > wider crystal filter response, but the early on versions of the KSB2 > > came standard with a 2.1kHz filter. Today it is 2.4kHz. If you look at > > your KSB2 module and take a look at the lettered capacitors around the > > crystals and you have caps installed in the B and N positions, then it > > has a 2.1kHz filter (I think all of those caps were mostly blue in > > color as well). > > > > Elecraft sells a capacitor kit to convert the KSB2 to a 2.4kHz or > > 2.6kHz filter by changing those lettered caps with different values to > > increase the width. It is called the SSBCAPKT and found on the site > > here: > > > https://elecraft.com/products/ssbcapkt_ksb2-wider-bandwidth-capacitor-kit. > > > As I mentioned, 2.4kHz has been the standard width sold with the KSB2 > > for a number of years now. > > > > Another thing to keep in mind is that there was also a crystal type > > change applied as well to provide a flatter response and improve audio > > quality. Again, looking at your KSB2 module, if the crystals have a > > "-S' suffix on them, then you already have the newer crystals. If not, > > you can upgrade them (and you may want to upgrade your CW crystals at > > the same time if they do not have the "-S" suffix). There is a crystal > > kit called K2KSB2XTLS that contains 14 crystals to replace both the > > KSB2 and K2 CW crystals. > > > > It is preferred to replace the caps and crystals at the same time as > > it is easier to replace those tiny caps while the old crystals are > > removed from the KSB2 board. Replace the caps first for your desired > > width and then the crystals. It does make quite a bit of difference in > > audio response. > > > > 73, > > Dave, W8FGU > > > > > > On 12/21/2021 9:11:33 AM, "Edward Tanton" <[email protected]> wrote: > > > >> I too would be interested in hearing the answer for this. I am NOT a > >> big SSB person, but would always prefer fidelity on the 1% of such > >> QSOs. Sent from my T-Mobile 4G LTE Device > >> -------- Original message --------From: Terry Bassett > >> <[email protected]> Date: 12/21/21 9:01 AM (GMT-05:00) To: > >> [email protected] Subject: [Elecraft] K2/100 audio I assembled > >> my k2/100 quite some time ago. I finally used it on ssb. I wastold my > >> audio was too tight. I think the early ones were setup for > >> contestaudio. Mine was about serial number 3400 or so.My question is > >> this: what can I do to change it to more of a ragchew styleof > >> audio?TIAW9TRB > >> > Terry______________________________________________________________Elecraft > >> mailing listHome: > >> http://mailman.qth.net/mailman/listinfo/elecraftHelp: > >> http://mailman.qth.net/mmfaq.htmPost: > >> mailto:[email protected] list hosted by: > >> http://www.qsl.netPlease help support this email list: > >> http://www.qsl.net/donate.htmlMessage delivered to [email protected] > >> ______________________________________________________________ > >> Elecraft mailing list > >> Home: http://mailman.qth.net/mailman/listinfo/elecraft > >> Help: http://mailman.qth.net/mmfaq.htm > >> Post: mailto:[email protected] > >> > >> This list hosted by: http://www.qsl.net > >> Please help support this email list: http://www.qsl.net/donate.html > >> Message delivered to [email protected] > > > > ______________________________________________________________ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:[email protected] > > > > This list hosted by: http://www.qsl.net > > Please help support this email list: http://www.qsl.net/donate.html > > Message delivered to [email protected] > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
