Mark, an RS-35 ought to be plenty capable of powering your K3. I am using a Drake PS-7 (originally for the TR-7) which doesn't sag at all yet I am having the same problem with my K3 TX power that you reported...sent a note to K3 Support and will let you know any information.
John On Tue Feb 14 7:27 , sent: >---- Keith [email protected]> wrote: >> One would initially think of a power supply problem, I found out an >> Astron RS-20 is insufficient. > >That is good information to know! Thanks. Exactly the sort of info I was seeking when I reiterated someone else's questions about power supplies. > >Is the RS-35 up to it? I saw a 'used' RS-70 for sale recently.... but I wasn't ready to buy until I gathered more information from here and elsewhere > >de K5MSG >yes, it's vanity... >Mark S Gilstrap > >---- Keith [email protected]> wrote: >> One would initially think of a power supply problem, I found out an >> Astron RS-20 is insufficient. >> But "new firmware" was mentioned, the latest is 4.39 (non-beta), Are >> either of you using a new Beta version? >> Keith >> >> On 2/12/2012 3:14 PM, [email protected] wrote: >> > Latest firmware, just did TX cal a few weeks ago, same things happens >> > whether on >> > antenna or dummy load, PS not dropping, mine drops to essentially zero >> > output >> > above about 88 watts. >> > >> > >> > >> > >> > >> > anyone....Buehler....anyone? >> > >> > >> > >> > >> > >> > >> > >> > >> > On Sun Feb 12 15:05 , sent: >> > >> >> Mine just started that behavior yesterday as well.....the oddest >> >> thing...any >> >> ideas, guys? >> >> >> >> >> >> John >> >> >> >> >> >> >> >> >> >> On Sun Feb 12 13:38 , r_zerr sent: >> >> >> >>> I began having problems this morning when I went to check into the >> >>> Elecraft >> >>> Net. I had my output set at 100W, and I did not have any output. By >> >>> turning >> >>> it down to around 70 watts, I could transmit. >> >>> >> >>> I went through the transmit gain calibration on 20M and the Wattmeter >> >>> calibration, with apparent changes in the Wattmeter reading (initially at >> >>> 31, now at 79...50W into Dummy load, Bird Wattmeter, 100W slug). The >> >>> Transmitter gain changed only slightly, 16 to 17, but is more of a choice >> >>> between high-side, or low side of the meter reading. >> >>> >> >>> Checked and Bat Min setting is at 11.0V and the KXV3 setting is normal >> >>> >> >>> Other info in present condition: 20M>90W kicks off. 20.4A draw@90W PA >> >>> temp=33C Voltage @load=12.4V >> >>> >> >>> I checked the behavior on 17M with similar problems, kicks off above 96W >> >>> setting, with 12.8V, 14.3A draw >> >>> 15M kick of above 96W, with 12.6V @ 17.8A >> >>> 12M kicks off above 97W, with 12.8V @ 14.1a >> >>> 10M kicks off above 97W with 12.9V @ 13.6A >> >>> 30m kicks off above 98W with 12.6V @ 16.5A >> >>> similar results on 40m and 80m >> >>> >> >>> Before I go pulling the top off and checking connections, does anyone >> >>> have >> >>> any suggestions? >> >>> >> >>> >> >>> -Ron, WT5RZ >> >>> >> >>> >> >>> -- >> >>> View this message in context: >> >> http://elecraft.365791.n2.nabble.com/K3-Hi-power-Transmit-limiting-tp7278630p7278630.html >> >>> Sent from the Elecraft mailing list archive at Nabble.com. >> >>> ______________________________________________________________ >> >>> Elecraft mailing list >> >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> >>> Help: http://mailman.qth.net/mmfaq.htm >> >>> Post: [email protected] >> >>> >> >>> 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: [email protected] >> >> >> >> 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: [email protected] >> > >> > 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: [email protected] >> >> 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: [email protected] > >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:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
