[Elecraft] KAT 500

[Don Wilhelm]

Iain and all,

I actually think there is little difference between "tuning" into an 
already resonant load and putting the tuner in bypass.  I do not have 
the KAT500 to do any testing of that statement, but it is true for all 
the other Elecraft tuners I have worked with.  To me, leaving the tuner 
in all the time just makes sense - just do a TUNE if there is any 
question.  No need to bypass it except for testing purposes.

In fact, doing a TUNE into that 50 ohm load may be better than bypassing 
since any residual reactance will be compensated for.

I do hope Wayne. Eric and Lisa get some sleep on the plane - traveling 
East to West makes for a very long day and upset sleep patterns on the 
westerly end.

73,
Don W3FPR

On 5/20/2012 5:00 PM, iain macdonnell - N6ML wrote:
> Hi Dick/anyone,
>
> Does that mean that the KAT500 can automatically retune (based on
> memory) immediately on band-change, without any RF being transmitted?
> That'd be rather cool. If yes, can it also be told that some bands
> don't need matching, and so automatically go into bypass for those
> bands?
>
> 73,
>
>      ~iain
>
>
>
> On Sun, May 20, 2012 at 11:26 AM, Dick Dievendorff<dieven at comcast.net>  wrote:
>> This is correct.
>>
>> However the KAT500 will also work with other radios and amps, so we provide a couple of ways for amp interrupt. With K3 band lines we can bandswitch on receive, otherwise we have to detect band change on Tx, similar to the technique used by the KPA500.
>>
>> Dick
>>
>> On May 20, 2012, at 14:14, iain macdonnell - N6ML<ar at dseven.org>  wrote:
>>
>>> On Sun, May 20, 2012 at 9:58 AM, r miles<greenacres113 at charter.net>  wrote:
>>>> I placed my order. I hope to be in the 1st run. I have a question or two
>>>> for the guys who saw it at Dayton.
>>>> How is it cabled. Not the antenna connections.  K3 to it or thru the
>>>> KPA500?  Will there be a special cable like the one  for the K3 to
>>>> KPA500?
>>> I wasn't at Dayton, but you can see the connectors here:
>>>
>>> http://www.elecraft.com/KAT500/kat500rear_visalia.jpg
>>>
>>> Clearly the "ACC" connection "loops through" the KAT500 to get the
>>> KPA500. This makes sense, as it would allow the tuner to interrupt the
>>> keying line to the amp during tuning, etc.
>>>
>>> This part is *speculation* on my part; I imagine that the typical
>>> configuration will be a straight-through DE-15 (as supplied in the
>>> KPAK3AUX kit) between the K3 and KAT500, and another (identical cable)
>>> between the KAT500 and KPA500
>>>
>>> 73,
>>>
>>>     ~iain / N6ML
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