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KPA500 no transmit question...

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NK7Z

KPA500 no transmit question...

I am writing this for a friend, who for now, has limited access to he list.

He has a KPA500/KAT500/K3. All was working fine last time he used it.
Today, the amp comes on, but no power. Here are the details...

1. Amp shows the "*" when it keys.
2. K3 shows KPA500 ON, when the amp comes on.
3. K3 shows KPA500 OPERATE when it is switched to operate.
4. The K3 reduces power when the KPA500 is in operate mode.
5. No fault is indicated.

I loomed at TX INHIB, on the K3, and it is OFF as it should be.

All cables are tight...

I just got my KPA500 last week, so my experience is limited. What am I
missing? He will call Elecraft tomorrow, but I want to know if it is a
setting issue, or something broke.

--
73s and thanks,
Dave (NK7Z)
https://www.nk7z.net
Award Manager, 30MDG Grid Awards
ARRL Technical Specialist
ARRL Volunteer Examiner
ARRL OOC for Oregon
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Re: KPA500 no transmit question...

This sounds like there is no RF going into the KPA500. When the KPA500 is in STBY mode and he transmits, do the KPA500 indicators show the proper power level to match what he thinks the K3 is outputting? He might insert a wattmeter between the K3 and KPA500 to make sure that power is going into the KPA when he thinks it is. If not, then it is time to diagnose things in the K3.

The folks down in Watsonville are very good at diagnosing system problems of this sort. Calling them to help solve the issue would be a good thing.

73!
Jack, W6FB

> On Mar 7, 2019, at 5:50 PM, Dave Cole (NK7Z) <[hidden email]> wrote:
>
> I am writing this for a friend, who for now, has limited access to he list.
>
> He has a KPA500/KAT500/K3. All was working fine last time he used it. Today, the amp comes on, but no power. Here are the details...
>
> 1. Amp shows the "*" when it keys.
> 2. K3 shows KPA500 ON, when the amp comes on.
> 3. K3 shows KPA500 OPERATE when it is switched to operate.
> 4. The K3 reduces power when the KPA500 is in operate mode.
> 5. No fault is indicated.
>
> I loomed at TX INHIB, on the K3, and it is OFF as it should be.
>
> All cables are tight...
>
> I just got my KPA500 last week, so my experience is limited. What am I missing? He will call Elecraft tomorrow, but I want to know if it is a setting issue, or something broke.
>
> --
> 73s and thanks,
> Dave (NK7Z)
> https://www.nk7z.net
> Award Manager, 30MDG Grid Awards
> ARRL Technical Specialist
> ARRL Volunteer Examiner
> ARRL OOC for Oregon
> ______________________________________________________________
> 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

NK7Z

Re: KPA500 no transmit question...

Thank you for the answer... I'll ask him tomorrow... More as I get
it... Once I find out I'll also post.

73s and thanks,
Dave (NK7Z)
https://www.nk7z.net
Award Manager, 30MDG Grid Awards
ARRL Technical Specialist
ARRL Volunteer Examiner
ARRL OOC for Oregon

On 3/7/19 7:28 PM, Jack Brindle wrote:

> This sounds like there is no RF going into the KPA500. When the KPA500 is in STBY mode and he transmits, do the KPA500 indicators show the proper power level to match what he thinks the K3 is outputting? He might insert a wattmeter between the K3 and KPA500 to make sure that power is going into the KPA when he thinks it is. If not, then it is time to diagnose things in the K3.
>
> The folks down in Watsonville are very good at diagnosing system problems of this sort. Calling them to help solve the issue would be a good thing.
>
> 73!
> Jack, W6FB
>
>
>
>> On Mar 7, 2019, at 5:50 PM, Dave Cole (NK7Z) <[hidden email]> wrote:
>>
>> I am writing this for a friend, who for now, has limited access to he list.
>>
>> He has a KPA500/KAT500/K3. All was working fine last time he used it. Today, the amp comes on, but no power. Here are the details...
>>
>> 1. Amp shows the "*" when it keys.
>> 2. K3 shows KPA500 ON, when the amp comes on.
>> 3. K3 shows KPA500 OPERATE when it is switched to operate.
>> 4. The K3 reduces power when the KPA500 is in operate mode.
>> 5. No fault is indicated.
>>
>> I loomed at TX INHIB, on the K3, and it is OFF as it should be.
>>
>> All cables are tight...
>>
>> I just got my KPA500 last week, so my experience is limited. What am I missing? He will call Elecraft tomorrow, but I want to know if it is a setting issue, or something broke.
>>
>> --
>> 73s and thanks,
>> Dave (NK7Z)
>> https://www.nk7z.net
>> Award Manager, 30MDG Grid Awards
>> ARRL Technical Specialist
>> ARRL Volunteer Examiner
>> ARRL OOC for Oregon
>> ______________________________________________________________
>> 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
>