[Elecraft] KPA1500 no RF passthrough without amp keying

[David Decoons]

To follow up, Rene was able to replicate the condition on the bench by removing the AUX cable from radio to amp and just applying RF when amp in standby. The internal wattmeter will not operate without the key in line.

This will be passed to the proper people in Elecraft for review.

Thanks all who made suggestions. At least I am not crazy!

Dave wo2x


Sent from Mail for Windows 10

From: Eric Swartz - WA6HHQ, Elecraft
Sent: Friday, October 19, 2018 9:55 AM
To: Dave
Cc: Elecraft at mailman.qth.net
Subject: Re: [Elecraft] KPA1500 no RF passthrough without amp keying

Yes it does.

Eric
elecraft.com
_..._



> On Oct 19, 2018, at 6:36 AM, Dave <rocketnj at gmail.com> wrote:
> 
> One other thought I will test as soon as I get home in a few, 
> 
> Does the 1500 internal meter work when in standby and no keying line from radio?  I was using the amp metering and not external to check pass thru. 
> 
> Dave wo2x
> 
> Sent from my waxed string and tin cans. 
> 
>> On Oct 19, 2018, at 9:24 AM, Eric Swartz - WA6HHQ, Elecraft <eric at elecraft.com> wrote:
>> 
>> Tell the front desk I suggested you talk to Rene, our lead engineering tech on the 1500.
>> 
>> Eric
>> elecraft.com
>> _..._
>> 
>> 
>> 
>>> On Oct 19, 2018, at 6:22 AM, Dave <rocketnj at gmail.com> wrote:
>>> 
>>> Thanks Eric
>>> 
>>> I am seeing something different and will call after they open. 
>>> 
>>> Thank you
>>> Dave wo2x
>>> 
>>> Sent from my waxed string and tin cans. 
>>> 
>>>> On Oct 19, 2018, at 9:20 AM, Eric Swartz - WA6HHQ, Elecraft <eric at elecraft.com> wrote:
>>>> 
>>>> Hi Dave,
>>>> 
>>>> When in standby mode the KPA1500 RF deck is bypassed by a relay and absolutely passes driver power from input to antenna without any amp keying required. If you think you are seeing something different, please contact support at elecraft.com and they will help you figure it out.
>>>> 
>>>> 73,
>>>> Eric
>>>> elecraft.com
>>>> _..._
>>>> 
>>>> 
>>>> 
>>>>> On Oct 19, 2018, at 5:06 AM, David Decoons <rocketnj at gmail.com> wrote:
>>>>> 
>>>>> I found my KPA1500 does not have RF passthrough in standby unless the radio provides amp keying. Is this by design and any way to disable this “feature”?
>>>>> 
>>>>> I use a program called DDUtil which limits power out per band to prevent accidental overdrive of the amp. When DDUtil is in standby it disables the radio’s amp keying line and sets radio to 100 watts automatically. 
>>>>> 
>>>>> Thanks
>>>>> Dave wo2x
>>>>> 
>>>>> 
>>>>> Sent from Mail for Windows 10
>>>>> 
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