Jack Yes, there is an asterisk that appears on the KPA display after transmit. PA key line checks out OK. Open when unkeyed and shorted to ground when keyed - checked with ohmmeter. By the way the K2 has no problem keying my Drake L4B and I have used it on the Drake since August of last year.
Thanks for your help Ariel NY4G Sent from my iPad > On Jan 10, 2014, at 9:23 PM, "Jack Brindle" <[email protected]> wrote: > > OK, so let me understand better. You have a coax cable going from the K2/100 > ANT jack to the KPA500 RF Input jack. You also have a phono cable connected > to the K2/100 PA KEY OUT jack going to the PA KEY jack on the KPA500. When > you have things connected this way the receive signals in the K2 go away when > the KPA500 is set to OPER. Correct? > And, when you disconnect the phono cable the receive audio comes back. > > Are you sure the PA KEY OUT on the K2/100 is operating properly? Is there an > asterisk on the left side of the KPA500 LCD screen when the phono cable is > connected? If so, check the phono cable then the PA KEY OUT to make sure they > are OK. This would indicate that the KPA500 is being held in transmit, which > would indeed block the receive signals. > > Let me know what you find. You should be able to test the PA KEY OUT > connection with an ohmmeter. When the K2 is keyed, the PA KEY OUT will pull > the signal to ground (conducting) otherwise it should be open. > > Jack B, W6FB > >> On Jan 10, 2014, at 6:08 PM, Ariel Jacala <[email protected]> wrote: >> >> Jack >> >> I am driving it with the KPA100 on the K2 >> >> Ariel >> >> Sent from my iPad >> >>> On Jan 10, 2014, at 9:03 PM, "Jack Brindle" <[email protected]> wrote: >>> >>> Are you driving the KPA from a K2 or K2/100? If the former, do you have the >>> external Key interface installed in the K2? >>> >>> Jack B, W6FB >>> >>> >>>> On Jan 10, 2014, at 5:58 PM, Ariel Jacala <[email protected]> wrote: >>>> >>>> Jack >>>> >>>> The problem appears to be in the keying interface. Disconnecting the >>>> keying cable enables receive while in operate - per Lyle's comment. >>>> >>>> Ariel NY4G >>>> >>>> Sent from my iPad >>>> >>>>> On Jan 10, 2014, at 8:49 PM, "Jack Brindle" <[email protected]> wrote: >>>>> >>>>> You may want to talk to tech support when they open on Monday. You can >>>>> connect the KPA to the K2 using a serial cable, but be sure to follow the >>>>> K2 rules and only connect pins 2, 3 and 5. DO NOT connect the other pins >>>>> on the KPA -0 that is, do not use a straight-through 9 conductor cable. >>>>> Set the KPA’s RADIO menu setting to SERIAL and the data rate to 4800. >>>>> >>>>> This won’t solve the receive problem, though. The problem sounds serious >>>>> enough that Customer Support will need to help you. >>>>> >>>>> Jack Brindle, W6FB >>>>> >>>>>> On Jan 10, 2014, at 5:24 PM, Cady, Fred <[email protected]> wrote: >>>>>> >>>>>> Hello Ariel, >>>>>> Does the KPA500 show the same band that the K2 is on? If not, try >>>>>> tapping your key to send a little RF to the amp when in operate mode so >>>>>> it can measure the frequency and switch in the correct band pass filters. >>>>>> Cheers, >>>>>> Fred KE7X >>>>>> "The Elecraft K3: Design, Configuration, and Operation, 2nd Ed" >>>>>> "The Elecraft KX3 -- Going for the Summit" >>>>>> Coming soon: "The Elecraft KPA500 and KAT500" >>>>>> >>>>>> -----Original Message----- >>>>>> From: [email protected] >>>>>> [mailto:[email protected]] On Behalf Of Ariel Jacala >>>>>> Sent: Friday, January 10, 2014 5:24 PM >>>>>> To: elecraft reflector >>>>>> Subject: [Elecraft] Connecting a K2 to a KPA500 >>>>>> >>>>>> Hi to the Elecraft Reflector >>>>>> >>>>>> I just acquired a KPA500 and connected it to a K2. I have the output >>>>>> of the K2 connected to the input of the KPA500. Things checked out >>>>>> through a dummy load in terms of loading the amplifier. The KPA500 is >>>>>> then connected to a resonant antenna. When on standby, I can hear >>>>>> signals through the antenna. When I press operate - I can no longer >>>>>> hear the signals. >>>>>> >>>>>> When I press the tune button on standby, the KPA500 does not measure >>>>>> SWR. Is this normal? The KPA500 was previously operated with a K3 with >>>>>> the K3 cable to the KPA500. I can key the KPA500 with the K2 and it >>>>>> produces expected power with the recommended drive levels. I am worried >>>>>> about not hearing signals when in operate mode. >>>>>> >>>>>> Do I need to update the firmware? Why can't I hear signals from the >>>>>> antenna with the KPA500 in "operate"? >>>>>> >>>>>> Any help is appreciated. >>>>>> >>>>>> Thanks >>>>>> >>>>>> Ariel NY4G >>>>>> >>>>>> Sent from my iPad >>>>>> ______________________________________________________________ >>>>>> 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 >>>>>> ______________________________________________________________ >>>>>> 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 > ______________________________________________________________ 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
