I think Mike hit the nail on the head and saved me some typing. The reason why your two capacitors are different values than those shown is due to the amount of capacitance needed to bring your particular crystal 'on-frequency'.
Scott Scott Zimmerman Amateur Radio Call N3XCC 612 Barnett Rd Boswell, PA 15531 ----- Original Message ----- From: "swellesleys" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Thursday, December 13, 2007 10:12 PM Subject: [Repeater-Builder] Re: KXN1018C versus KXN1019B Channel Element > > Thanks for the information Scott. Since the only difference I see is > the two capacitors, I wonder what makes it more stable. Perhaps it is a > difference in the crystal itself. Have you ever seen a place where the > subject of how the channel elements are individually temperature > compensated (as when you send your channel element into the crystal > manufacturer) is explained? > > Steve - N8AR > > --- In [email protected], "Scott Zimmerman" <[EMAIL PROTECTED]> > wrote: >> >> The only differnence that I have heard of is stability. As I remember >> someone telling me at a hamfest that the 1018's were higher stability > than >> the 1019's. If memory serves the 1018's are 2ppm?? According to the > channel >> chart here: http://repeater-builder.com/micor/micor-element-info.html > The >> 1019's are 5 ppm. So logically that would make the 1018's 2ppm. >> >> Long and short, I have always found them to be interchangeable in all > the >> situations I have encountered. >> >> Scott >> >> Scott Zimmerman >> Amateur Radio Call N3XCC >> 612 Barnett Road >> Boswell, PA 15531 >> ----- Original Message ----- >> From: "swellesleys" [EMAIL PROTECTED] >> To: [email protected] >> Sent: Sunday, December 09, 2007 1:17 AM >> Subject: [Repeater-Builder] KXN1018C versus KXN1019B Channel Element >> >> >> > Does anyone know the difference between the Motorola KXN1018C and > the >> > KXN1019B channel elements. I am working on a Micor based repeater > for >> > our local repeater group. The exciter board is a Motorola TLD5322A >> > which uses the KXN1019B channel element according to my Motorola > manual >> > (68P81013E65L). However, the exciter board I am using came with four >> > KXN1018C channel elements. I have compared the KXN1018C I have to > the >> > schematic and layout of the KXN1019B on Repeater-builder and the > only >> > difference I see for components which have values in the schematic > are >> > C1 (22pF instead of 36pF) and C4 (10pF instead of 9pF). >> > >> > >> > >> > >> > >> > >> > Yahoo! Groups Links >> > >> > >> > >> > >> > >> > -- >> > No virus found in this incoming message. >> > Checked by AVG Free Edition. >> > Version: 7.5.503 / Virus Database: 269.16.17/1179 - Release Date: >> > 12/9/2007 11:06 AM >> > >> > >> > > > > > > > > > Yahoo! Groups Links > > > > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.5.503 / Virus Database: 269.17.1/1181 - Release Date: > 12/11/2007 5:05 PM >
