Re: KPA-1500 tuner questions

Posted by Bob McGraw - K4TAX on Mar 13, 2019; 12:58pm
URL: http://elecraft.85.s1.nabble.com/KPA-1500-tuner-questions-tp7649648p7649688.html

Personally I'd try to correct the antenna issue so the tuner in the
KPA1500 performs  as designed.  The antenna should be able, with the
KPA1500 tuner, to cover then entire 75/80M band. Although I use the
KAT500, same equivalent circuit, I have no issue with full band coverage
on 75/80M.

As to the Palstar, I'd take Jim's advice, and find it a new home.  Two
automatic tuners in line is a formula for disaster as I view it.   If
you wish to use the Palstar all of the time, then set the one in the
KPA1500 to bypass all of the time.

73

Bob, K4TAX



On 3/13/2019 5:01 AM, Dave wrote:

> The problem you will run into is if the antenna SWR changes above the threshold for both the KPA1500 tuner and HF Auto bothtuners will initiate a retune and the two will be fighting each other.
>
>   Example - ice, branches against antenna, etc.
>
> For the bands where you need to use the HF Auto, you are better off leaving the KPA1500 in bypass.
>
> Dave wo2x
>
> Sent from my iPad
>
>> On Mar 13, 2019, at 12:25 AM, Peter Dougherty <[hidden email]> wrote:
>>
>> I think instead I'll go the route of always leaving it in line, but that
>> method would certainly work too! Thanks, Paul!
>>
>>
>>
>> - pjd
>>
>>
>>
>> From: Paul Baldock <[hidden email]>
>> Sent: Tuesday, March 12, 2019 3:36 PM
>> To: Peter Dougherty <[hidden email]>; 'Reflector Elecraft'
>> <[hidden email]>
>> Subject: Re: [Elecraft] KPA-1500 tuner questions
>>
>>
>>
>> At 07:49 PM 3/11/2019, Peter Dougherty wrote:
>>
>>
>>
>>
>>
>> The HF-Auto (external automatic tuner) is bypassed everywhere except the
>> range of 3650 to 4000, and 7100 to 7300. I would like to automatically have
>> the KPA1500's tuner go into bypass at the above ranges,
>>
>>
>> One method (there are others) is to connect a dummy load to the KPA1500, and
>> do a TUNE for each bin in those ranges. The tuner will then learn to go into
>> BYPASS for those BINS.
>>
>> - Paul
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html