My cable is store bought, and it is the kind in figure 7.2, i.e. without the TXD wire. I ohmed it to be sure. Actually, it is a cable with a separate Y adaptor, but the effective wiring is the same as figure 7.2.
And here's the kicker: This morning when I fired up everything to do some more troubleshooting, everything worked just as it should. It seems I have an intermittent connection somewhere, most likely in a cable, connector or the Y adaptor. It's been working fine all day. I think I will build a new cable and Y adaptor to eliminate that as a possible cause and see if the problem stays gone. I did notice one thing that seems odd. When I do not have a logging program running and I do a manual band change on the K3, the ACOM does not follow the change. I thought it should. Does your's work that way? As soon as I start a logging program, everything returns to normal. Don't you just love these intermittent gremlins? :-) 73, Bill W6WRT ------------ ORIGINAL MESSAGE ------------(may be snipped) On Fri, 12 Sep 2014 18:47:48 -0400, Nick wrote: >Hi Bill > >Did you build your cable according to schematic on page 34 (figure 7-6) >from Acom 2000 manual? This wiring diagram is for K3 CAT with ACOM 2000A >only. I believe this diagram assumes there is no computer connected in. >It only describes the case in which there is a connection between the K3 >and Acom 2000A. > >If you look at the page 32 (Fig 7-2) which describes the "generic" wiring >between RS232 PC port and Transceiver with ACOM connected via "Y" cable, >you will notice that they only use the RXD wiring and the ground. TXD >line has been omitted. > >RCU DB15 Pin 1 <-------> RS-232 Pin 2 >RCU DB15 Pin 5 <-------> RS-232 Pin 5 (Ground) > >I initially built the CAT cable using all 3 wires (RXD, TXD + Ground) and >as soon as ACOM would come online, K3 would not work properly with my >LP-PAN and LP Bridge. I don't use P3. > >I snipped the TXD line after reading your email and now everything appears >to be working fine. K3+ACOM2000A+PC are tracking frequency smoothly like >usual. > >If I now just type the frequency in Win-Test or change the band on my K3, >ACOM nicely parks itself on a whichever band segment it detects by sniffing >the comm traffic between K3 and the PC. > >73, Nick >ve3ey > > >On Fri, Sep 12, 2014 at 6:18 AM, Bill Turner <dez...@outlook.com> wrote: > >> ------------ ORIGINAL MESSAGE ------------(may be snipped) >> >> On Fri, 12 Sep 2014 08:46:23 -0000, you wrote: >> >> >Bill, >> > I too use the Acom 2000A and do not know why you bother with so many >> >control cables. The Acom switches bands in a dit or syllable and tunes >> in >> >three seconds automatically. I must be missing something but why do you >> >need to go to so much trouble with control cables for the amplifier. >> >> REPLY: >> >> The reason I bother is I do not like transmitting even a single dit >> into an amplifier on the wrong band at full power. Yes, the ACOM is a >> tough amplifier but I am pretty conservative about such things. When I >> do send a dit to change bands, I reduce the drive power way down. If I >> can get the automatic band change to work, I won't have to reduce >> power or send a dit. It will already be pre-tuned. >> >> 73, Bill W6WRT >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Elecraft@mailman.qth.net >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> Message delivered to nick.ve...@gmail.com >> ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
