Thanks! I found the earlier manual online, and am back operational! Thanks!
Tom W4KX > On May 3, 2020, at 4:14 PM, iain macdonnell - N6ML <[email protected]> wrote: > > On my early model, the interlock switch is actuated by an assembly > including a 13mm 4-40 standoff (and some other hardware), which is > attached to the inside of the top cover. I'll attempt to send you the > old (rev C) assembly manual off-list. > > 73, > > ~iain / N6ML > > > On Sun, May 3, 2020 at 1:07 PM Tom Doligalski via Elecraft > <[email protected]> wrote: >> >> Problem is definitely the interlock switch not being engaged correctly: if I >> close it manually (with a wooden rod!) the amp operates normally. >> >> Anyone have an assembly manual for the older type KPA500, so I can see how >> the top-panel interlock switch is supposed to be engaged? Again, this a >> fairly old amp, and Elecraft changed things in later versions (like the one >> covered in the assembly manual currently on the website). >> >> Thanks! >> >> Tom W4KX >> >>> On May 3, 2020, at 3:21 PM, Tom Doligalski via Elecraft >>> <[email protected]> wrote: >>> >>> Hi Jack! >>> >>> After cycling the main power the HV in standby is back to 70 V. But, every >>> time I go to operate mode, the error reoccurs. >>> >>> This is with what I believe was the old style interlock switch (has a shaft >>> attached to the top cover to engage the switch when the top is screwed >>> down). Can’t tell if it is properly engaging. But the behavior is the same >>> when the top cover is totally removed. >>> >>> How picky is this switch. I bought the amp used, and the assembly manual >>> online at elecraft doesn’t cover the old interlock switch. >>> >>> Thanks for your help! >>> >>> Tom W4KX >>> >>> Sent from my iPad >>> >>>> On May 3, 2020, at 3:06 PM, Jack Brindle <[email protected]> wrote: >>>> >>>> A “270V ERR” fault indicates that the TR switch bias supply is not >>>> working. This may be caused by the top cover being removed, the safety >>>> switch attached to the top cover becoming loose or an actual failure of >>>> the 270V supply. Since your main HV supply is now down close to 0V, it >>>> looks like you have power supply issues. You should call technical support >>>> on Monday to get help. >>>> >>>> 73 and good luck getting your KPA going again. >>>> Jack, W6FB >>>> >>>> >>>>> On May 3, 2020, at 11:32 AM, Tom Doligalski via Elecraft >>>>> <[email protected]> wrote: >>>>> >>>>> My KPA500 has been working fine waited for 115 V. Just now it has been >>>>> throwing a “25=70 VAC” fault! >>>>> >>>>> Can anyone lead me in helping this? Fuses look good. HV read 0.1 v when >>>>> in standby, which is FAR from the 70 some volts it used to read. >>>>> >>>>> Thanks! >>>>> >>>>> Tom W4KX >>>>> ______________________________________________________________ >>>>> 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 >>>>> Message delivered to [email protected] >>>> >>> ______________________________________________________________ >>> 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 >>> Message delivered to [email protected] >> >> ______________________________________________________________ >> 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 >> Message delivered to [email protected] ______________________________________________________________ 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 Message delivered to [email protected]
