[Elecraft] kpa500 doesnt follow k3

[NE9U - Jasper]

Thanks Jack....the change in KIO3 menu item fixed the problem of my kpa500 and kat500 not following the k3.   It was set to trn instead of nor.

ive had two or three guys email me off reflector with same problem....maybe this is also why their band switching isnt working.

Thanks and 73

Scott  NE9U



Sent from Republic Wireless Cray-1

> On Oct 31, 2015, at 2:45 AM, Jack Brindle <jackbrindle at me.com> wrote:
> 
> The KAT500 should also band switch automatically when the K3 changes band. The KAT500 has additional support in the K3, though. It can follow the K3’s frequency and switch to the LC nomination needed for the antenna at that frequency. Go into the K3’s menu, KAT3 setting, and tap the 1 button on the K3 keypad. KAT500Y should flash on the VFOB display to tell you this is enabled. The procedure is described on page 60 of the current K3S manual. Note that the current K3/K3S firmware supports this setting, but it is not described in the K3 manual on the web site, but is described in the K3S manual there. Yes, the K3S and K3 firmware are the same, so we K3 owners get the new features, assuming our radios support them.
> 
> K3 serial 1732 should have proper support for changing the band lines. Very early K3s did not have pull-ups on their BAND lines (actually not needed by the KPA500). Your should have them. The next check is again in the Config menu, turn the VFOA nob to get to the KIO3 setting, then make sure it is set to NOR and not TRN or HF-TRN.
> 
> If that didn’t solve it, and you are comfortable with use a voltmeter to check the BAND lines, then do so. The pinout is described on page 18 of the manual.
> 
> I’ll be around all weekend if you need more help, so don’t hesitate to email me. 
> 
> Jack, W6FB
> 
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>> Sent from Republic Wireless Cray-1
>> 
>>> On Oct 31, 2015, at 1:41 AM, Jack Brindle <jackbrindle at me.com> wrote:
>>> 
>>> Did you build this from a kit or purchase it built?
>>> Is there anything else that seems off?
>>> Does the KAT500 change bands when the K3 changes bands?
>>> 
>>> When RADIO=K3, the KPA observes the band lines from the K3 to determine the band it should be on. When it sees the band lines change, it will change bands.
>>> When it senses RF it does a double-check, and will switch bands again if the mefrequency-counted RF does not agree with what the band lines indicate.
>>> 
>>> So at this point we need to determine that the K3 BAND signals are indeed switching, and if the cables inside the KP500 are properly seated. This would be the cable on the far left when viewing the KPA from the front. If it is off, either at the front panel or at the IO board, you might see this sort of problem. But I would expect you to see other problems as well.
>>> 
>>> The answers to these questions should provide some light.
>>> 
>>> - Jack, W6FB
>>> 
>>>> On Oct 30, 2015, at 10:44 PM, NE9U - Jasper <skjasper at att.net> wrote:
>>>> 
>>>> yes, the k3 recognizes when the kpa500 is turned on.
>>>> 
>>>> the cables are e850463.  ( i also have a new kat500....i get same result whether i have it or out of line)
>>>> 
>>>> radio setting in kpa500 is set to k3
>>>> 
>>>> i also updated all firmware yesterday thinking that might help....no change.
>>>> 
>>>> scott
>>>> 
>>>> 
>>>> 
>>>> 
>>>> Sent from Republic Wireless Cray-1
>>>> 
>>>>> On Oct 31, 2015, at 12:28 AM, Jack Brindle <jackbrindle at me.com> wrote:
>>>>> 
>>>>> Let’s make sure the K3 and KPA are communicating. When you power on the KPA, does the K3 indicate that something changed? It should display
>>>>> the KPA power event on the display. If not:
>>>>> * what cable are you using between the K3 and the KPA?
>>>>> * Check the RADIO setting in the KPA. It should be set to K3.
>>>>> 
>>>>> Is there anything else connected to the AUX IO ports on either the K3 or KPA?
>>>>> 
>>>>> - Jack Brindle, W6FB
>>>>> Elecraft Engineering
>>>>> 
>>>>>> 
>>>>>> On Oct 30, 2015, at 10:23 PM, NE9U - Jasper <skjasper at att.net> wrote:
>>>>>> 
>>>>>> Just hooked  a new kpa500 to a k3.  
>>>>>> 
>>>>>> when switching bands on the k3, the kpa500 doesnt follow.  it does follow when i apply power.
>>>>>> 
>>>>>> the reverse does work....if i switch bands on the kpa500, the k3 follows.
>>>>>> 
>>>>>> tried 2 different auxillary cables...same result with both.
>>>>>> 
>>>>>> am i missing some setting i need to change?  
>>>>>> 
>>>>>> scott  ne9u
>>>>>> 
>>>>>> 
>>>>>> Sent from Republic Wireless Cray-1
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