Ken,

If that Send cable is the only one you have connected between your Icom and the KAT500, you need to feed a bit of RF to initiate a TUNE

The KAT500 will first look for a saved L/C combination for that antenna and frequency and will switch to that rather than doing a TUNE.  Secondly, it will compute the SWR and if it is below 1.5, it will go into bypass - no tuning is necessary.

Is it possible that either one of those conditions exist?

73,
Don W3FPR

On 12/30/2018 6:12 AM, Ken B wrote:
Yes  from the 7600 accessory 1 pin 3 to the kat500

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    On Sun, Dec 30, 2018 at 4:52 AM, Don Wilhelm
    <[email protected]> wrote:
    Ken,

    Do you have the cable wired first to the KAT500 and then on to the
    KPA500?
    The KAT500 must interrupt the keying of the KPA500 when it needs
    to tune.

    73,
    Don W3FPR

    On 12/29/2018 10:13 PM, Ken B wrote:
    > Thank you Don.
    > The pin 3 (send) did the trick perfectly. Now it works at 300 to
    400
    > watts out with 20 in. The problem i have now is when i switch bands
    > the kat will not tune unless i remove all AC power from the amp.
    >
    >
    > Sent from Yahoo Mail on Android
    >
    
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    >
    >    On Thu, Dec 27, 2018 at 11:36 PM, Don Wilhelm
    >    <[email protected] <mailto:[email protected]>> wrote:
    >    Ken,
    >
    >    Look at your Icom 7600 documentation.  I believe the
    'keyword' may be
    >    "Send" or Keyout or something of that nature (PTT should be an
    >    input to
    >    the transceiver, not an output, but some manufacturers mix
    them up
    >    causing confusion - check the documentation).
    >    Connect that output from your transceiver first to the KAT500
    AMP KEY
    >    connector and from the other KAT500 AMP KEY connector to the
    KPA500.
    >    That allows the KAT500 to disable the amplifier keying if the
    KAT500
    >    needs to tune.
    >
    >    You should then be "good to go" with the basic cabling. When
    you get
    >    the proper cable, it will integrate better with your Icom,
    but the
    >    basic
    >    cabling will get you on the air with your new toys.
    >
    >    73,
    >    Don W3FPR
    >
    >    On 12/27/2018 11:14 PM, Ken B via Elecraft wrote:
    >    > Just received my the kap500 and found out it was missing the
    >    accessory cable which goes from the icom 7600 to the kat500.
    >    Elecraft is sending one but it might take a week. In the mean
    time
    >    does anyone have the accessory pin outs to rca plug so i can make
    >    one and use my new toy.
    >    > Thank youKenKc1icn
    >


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