KPA 500 &6400

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Is it possible to make the Kpa500 track the 6400
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Don

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Posted 1 year ago

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Al Matthews

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I use my 6600m and KPA1500 with a flex usb cable from Elecraft. It’s plug and play with the cable menu on my Flex.
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Don

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Al can you give little more detail
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Al Matthews

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Sure Don. Elecraft provides a cable for the Flex 6000 series. This is from their website.

CBL-FLEXKEY 6000-family Enhanced Mode. KXUSB cable for freq. data, (Phono Cable incl. w/Amp)

This came with my KPA1500. This allows full auto band switching with my Flex 6600. Very easy to implement.
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Don

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Thanks Al
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Roger, W6VZV

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Great info.  Thanks.
de Roger W6VZV
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bobby

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Tracks fine with auto detect no cable connectin needed sensing is built into amp as soon as it detects rf it changes to the correct setting ... works great
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Don

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Bobby can you give more detail
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Pat - WH6HI

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If you this method it will require you to key/tune the radio. With cable it directly tracks the radio. KPA500/1500 will band track. KTA500 will track the frequency and use its tune memory.
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Don

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Thanks Pat
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bobby

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I forgo to mention I do not have the kat500 tuner I set my tuning to preset values on my manual tuner prior to transmitting rf and the amp switches to the correct band as soon as rf is detected, fast enough to prevent trip or adverse actions.
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Rich - N5ZC

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Don,

See https://www.flexradio.com/downloads/usb-cable-interface-guide-pdf/

You will need a null modem adapter (for the kpa-500 only) between the USB cable from the 6400 to the KPA-500.  I use two USB cables, one to the KPA-500 and one to the KAT-500.  Both units track right along with my 6600.

I also have a USB cable going from my KPA-1500 to the 6600 and it tracks right along.  Perfect for SO2R contesting. 

I purchased my cables from Flex, if you order from Elecraft they may include the null modem adapter, you'll need to check.  I picked up a couple Null Modem adapters on amazon. Just be sure you get the correct gender on both sides.  I believe you need a double female.

Rich - N5ZC

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Don

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Thanks for all the help. To make the KPA 500 work with the 6400 you need the following . A cable set, CBL-FLEX-PWRCMB, for use with Flex 6000 family of transceivers.
The cable set includes: KUSB for Frequency, and a null modem with gender changer for data
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Scott Russell - N1SER

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This is the correct answer. This is the cable recommended to me directly from Elecraft for the KAT500/KPA500 combo to a 6400/6600.  CBL-FLEX-PWRCMB
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Michael Miller

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Just got it working using that cable. Make sure to set the radio to serial mode plus polling. It tracks band data using the newly release 3.0 version.. 
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Jeff Halliburton

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Michael, I'm trying to do the same thing with my Flex 6400 / KAT-500 / KPA-500.  I ordered the cable set from Elecraft and have it about 95% working. My only issue is that I can't run the KAT-500 Utility software now.  It's not seeing the com port that it is connected to.  You mentioned setting the radio to serial mode plus polling. Maybe that's what I'm missing? Where do I make that setting?  Thanks for your help -- Jeff, W4JSH.
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Michael Wheatley

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I use DDUtil to control my KPA500 and its tracking.  A USB cable (supplied by Elecraft) is connected to my PC.  It's COM port number is entered into DDUtil.

There are a number of advantages to this configuration in addition to tracking.  In particular, when you switch bands you can specify the default RF output by band when using the amp and barefoot, and when you switch bands, the amp is put in standby mode, thereby avoiding inadvertent damage.