Good question Garey. Of course from full power. But 45 dB is just an estimation. I will measure it more accurate. At least it is MUCH improved, as in initally I found out the problem by people reporting that I was almost producing AM hi! I guess you are right about C320, I see that as the actual cause! You deserve a statue Garey ;)
73, Dick PA2DW -----Oorspronkelijk bericht----- Van: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Namens Garey Barrell Verzonden: woensdag 12 december 2007 21:37 Aan: [EMAIL PROTECTED] Onderwerp: Re: [drakelist] TR7 carrier suppression Garey Barrell <[EMAIL PROTECTED]> made an utterance to the drakelist gang ---------------------------------------------------------------------- DW - Cool! Grounding is critical in several areas of the TR-7, so that would certainly help. The problem with C320 is probably a result of high ESR, or AC impedance. An electrolytic can measure good on a capacitance meter and still have a high ESR. Carrier suppression should be better than 60 dB below full output. You say yours is 45 dB down, but you don't say down from what!?!? :-) 73, Garey - K4OAH Glen Allen, VA Drake 2-B, 4-B & C-Line Service Supplement CDs <www.k4oah.com> DW Harms wrote: > Hi Garey and a few others, > > Many thanks for your help sorting this out. I exchanged C320 on the > TX-exciter board and made sure all the grounding is in proper order. > The carrier is still audible but a lot weaker then when I started! I > think C320 had the main effect, however if I measure it it reacts as a > normal electrolith... > The carriersuppression is now in the order of 45 dB down and I think > this is as good as I can get it. > > Thanks again, this list houses some REAL hams :) > > 73, Dick PA2DW > > > <http://msgtag.com/?source=ffooter> has notified the sender that this > message has been received. > > ---------------------------------------------------------------------- > -- > > 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 > ---------------------------------------------------------------------- Submissions: [EMAIL PROTECTED] Unsubscribe: [EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost: [EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net ----------------------------------------------------------------------
