Hi Mike, This seems to be a duplicate post (see http://elecraft.365791.n2.nabble.com/KPA-1500-FlexRadio-6400-td7665007.html), though I'm not sure if your questions were fully answered the first time.
First, to search the archives of this reflector, go to http://elecraft.365791.n2.nabble.com/Elecraft-f365791.topics.html and use the search box, top right. To get the KPA-1500 to track the exact frequency of the Flex (before you do any transmitting), you need to set up a proper connection between the 3.5mm stereo jack on the back of the KPA1500 labeled "XCVR SERIAL" and one of the common USB Type A connectors on the back of the Flex. 1. Use any of the following to make a serial connection between the two devices: - FTDI USB-to-Serial adapter + Elecraft KXSER cable - Elecraft KXUSB cable - Serial Box USB (https://bit.ly/S-BOX) + stock serial and stereo cables 2. For amp. keying, connect an ordinary RCA male-to-male patch cable between the RCA connector on the back of the KPA1500 labeled "KEY IN" and the RCA connector on the back of the Flex labeled "TX1" 3. In the KPA1500 Menu, set RADIO TYPE: SERIAL SERIAL SPEED XCVR: 9600 RADIO POLL: ON 4. In the FlexRadio SmartSDR Setup, select the new serial adapter that appears when connected to the back of the Flex *Settings | USB Cables* Cable Type: *CAT* Source: *TX Slice* Auto-report: *Disabled* Advanced: *9600,8,N,1* Flow Control: *None **Settings | Radio Setup* Transmit tab RCA TX1: 5 ms Enabled The KPA1500 and its tuner (if enabled) will now automatically track the exact frequency of the Flex, and be keyed by the Flex when it goes into transmit. You can verify the frequency by setting TECH MODE to ENABLED in the KPA1500 menu, then scroll the STATUS page of the KPA1500 LCD until you see XCVR FREQ and TX COUNT displayed. XCVR FREQ is the frequency reported by the radio over the Serial connection. TX COUNT is the approximate frequency detected by the KPA1500's built-in frequency counter whenever you transmit. If you have trouble making this work, feel free to contact me directly. 73, Bob, N6TV https://bit.ly/Y-BOX https://bit.ly/S-BOX On Tue, Sep 15, 2020 at 4:33 PM Mike Stone <mston...@tampabay.rr.com> wrote: > This is my first post. I am not sure if or where the search function is > located. > > I am running a KPA-1500 and a FlexRadio 6400. The amplifier recognizes > the band that the Flex is tuned to but it doesn’t recognize the frequency. > Any help would be appreciated. I am not technically proficient with either > the Flex or the KPA-1500, so please keep it simple for me. > Thanks > Mike, N1VE > > > Sent from Mail for Windows 10 > > ______________________________________________________________ > 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 n...@arrl.net ______________________________________________________________ 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
