[Elecraft] Extra Protection For KPA500?

[Jack Brindle]

One other thing to consider is that you don’t want to connect all of the pins straight through from the K3 to the KPA500. There are some conflicts that will cause problems. The Elecraft cables are set up properly with the appropriate pins cut that should not connect between the two devices. An alternative is to use a straight-through HD15-HD15 cable with the appropriate pins cut. Cutting them yourself is a pain, so we really don’t recommend that route.

73!
Jack, W6FB

> On Mar 6, 2020, at 12:19 PM, Bob McGraw K4TAX <rmcgraw at blomand.net> wrote:
> 
> Just order the two cables from Elecraft as it is a special wired and configured cable.   E85046   I doubt seriously if an aftermarket cable would work.
> 
> The manual clearly states  "do not use a standard VGA cable!"
> 
> The KAT500 manual, page 5, Fig. 1 is the correct configuration for your application.  It requires 2 of the E85046 cables.  This is not the time to be conservative or cut cost corners.  You have ~$8500 in radios depending on this.
> 
> 73
> 
> Bob, K4TAX
> 
> 
> On 3/6/2020 2:06 PM, Tony wrote:
>> Bob:
>> 
>> The AUX cable requirement makes sense. Can you recommend an aftermarket cable? I’ll need one for the KPA500 and another for the KAT500.
>> 
>> Thanks
>> 
>> Tony
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> Sent from my iPad
>> 
>>> On Mar 6, 2020, at 2:38 PM, Bob McGraw K4TAX <rmcgraw at blomand.net> wrote:
>>> 
>>> Tony et al:
>>> 
>>> Go to the K3S  CONFIG menu and PWR SET.  Set the value to PER BAND.  Then exit this menu by pressing MENU/CONFIG.  There IS NO value to set at this point.   Then with the KPA500 on and in OPER mode, while in RX, set the PWR value on the K3S to 20 watts or what ever power you wish to drive the amp with for that band. That is saved for that mode and band.   Then on to the next band.
>>> 
>>> When the KPA500 is in STBY mode the power value is what is set on the K3S for barefoot operation.  When the KPA500 is switched to OPER then the power value is what you have set for that mode and band.   This does require the KPA500 to communicate with the AUX cable.   See page 12 Fig 3 of the KPA500 manual for the configuration.
>>> 
>>> If you have the K3S, the KPA500 and the KAT500, then see page 5of the KAT500 manual, Fig 1 for the correct cables and configuration.
>>> 
>>> As they say, it is all in the manuals.
>>> 
>>> 73
>>> 
>>> Bob, K4TAX
>>> 
>>> 
>>>> On 3/6/2020 1:07 PM, Tony wrote:
>>>> 
>>>>> Tony, The Config Menu has a Per-Band power setting (PWR SET = PEr bAnd) that will set the power output depending on the band selected. If you use the Aux cable between the K3 and KPA500 is is fully automatic and seamless. 73 George AI4VZ
>>>> George:
>>>> 
>>>> I must be missing something because when I select PER BAND in the config menu, there's no power setting to set.
>>>> 
>>>> It doesn't display the power like TUN PWR does where the tune power is shown within that menu item so you can adjust it.
>>>> 
>>>> I have to order the AUX cable, but in the meantime I'd like to use this setting with the K3S so any suggestions would be appreciated.
>>>> 
>>>> Tony
>>>> 
>>>> 
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> 
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