Re: [Elecraft] KPA 500: No Output
Dave - Looking at your very nice website and the "Radio-end station setup," I'm wondering why you are using an external antenna switch? In my experience, especially for remote operation, you'll generally have a much more fool-proof installation using the KAT500's internal antenna switch. The way you're doing it, the KAT has no way to know which antenna it is supposed to be matching - and thereby could lead to many problems - including damage to the finals. 73 Lyn, WØLEN -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of dave ingebright Sent: Tuesday, December 13, 2022 9:47 AM To: elecraft@mailman.qth.net Subject: [Elecraft] KPA 500: No Output Hello-- I have a 3 yr old KPA500 that has just exhibited it's first problem. No amplification! I am remote controlling it via the remote client over the internet from 2000 miles away. Nothing has changed in the remote shack and no wiring has been disturbed. There is no output from the KPA on any band. I can see the 72 Volt B+, and the temp of the heatsink, and I can control the fan speed, so I have control of the unit. The client shows the exciter power through the amp and the SWR. There are no alarms and I have hit alarm reset and had the power plug pulled and reset. I'd guess the PTT line is somehow open but... asking if anyone has had a similar problem. tnx de dave WB7ELY My KPA500 page: https://www.valhallatreefarm.com/WB7ELY/kpa500/kpa500.htm __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to l...@lnainc.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA 500: No Output
If you have a camera pointing at the amp, look for the "*" when you key down... 73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Volunteer Examiner ARRL Technical Specialist, RFI ARRL Asst. Director, NW Division, Technical Resources On 12/13/22 07:47, dave ingebright wrote: Hello-- I have a 3 yr old KPA500 that has just exhibited it's first problem. No amplification! I am remote controlling it via the remote client over the internet from 2000 miles away. Nothing has changed in the remote shack and no wiring has been disturbed. There is no output from the KPA on any band. I can see the 72 Volt B+, and the temp of the heatsink, and I can control the fan speed, so I have control of the unit. The client shows the exciter power through the amp and the SWR. There are no alarms and I have hit alarm reset and had the power plug pulled and reset. I'd guess the PTT line is somehow open but... asking if anyone has had a similar problem. tnx de dave WB7ELY My KPA500 page: https://www.valhallatreefarm.com/WB7ELY/kpa500/kpa500.htm __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to d...@nk7z.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] KPA 500: No Output
Hello-- I have a 3 yr old KPA500 that has just exhibited it's first problem. No amplification! I am remote controlling it via the remote client over the internet from 2000 miles away. Nothing has changed in the remote shack and no wiring has been disturbed. There is no output from the KPA on any band. I can see the 72 Volt B+, and the temp of the heatsink, and I can control the fan speed, so I have control of the unit. The client shows the exciter power through the amp and the SWR. There are no alarms and I have hit alarm reset and had the power plug pulled and reset. I'd guess the PTT line is somehow open but... asking if anyone has had a similar problem. tnx de dave WB7ELY My KPA500 page: https://www.valhallatreefarm.com/WB7ELY/kpa500/kpa500.htm __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
