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
