For what it's worth, I accidently transmitted into an open load with my KPA100 and popped the finals. After the accident, the symptoms were exactly as you described, and the high current was about 26 amps. I replaced the finals and things were back to normal. Bad finals out of the box seems very unlikely so I'd first look for shorts in that area, but anything is of course possible. - Ron, W2RIP (no pun intended :^)
Don Wilhelm <[EMAIL PROTECTED]> wrote: Ron, How much power is actually being produced? Measure with an external wattmeter, then look at the bargraph display and see how many bars are indicated. If there is a lot of power being produced (120 watts or greater) and the bargraph does not indicate any RF power, you should look at the wattmeter section of the KPA100 - particularly T4. If the actual power output is not being reported to the base K2 microprocessor, the base K2 will increase drive in an effort to produce more power (because it thinks that is no power output). The solution to that situation is to find the fault in the wattmeter of the KPA100. 73, Don W3FPR Ron Hahn (EI2JP) wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Colleagues, > > I've just finished a KPA100 and am in the process of doing the final > checkout. > > I've made it past the bias adjustment stage and the power supply test > stages. > > Below 11 watts output (PA switched out) everything seems to work OK. > > Setting the power output to 20 watts and pressing tune results in NO > power output and a current draw of approx. 26 amps. Not good. > > I checked recent posts regarding this problem but none seem to have the > high current problem associated with no KPA output power. > > Suggestions? > > Thanks a mil, > > Ron > > - -- > - -=-------------------------o---------------------------=- > Ron Hahn, EI2JP | Grid Square: IO62TG > Rose Hill | Fists: 10883 > Rosslare Strand | QRP-ARCI: 12584 > County Wexford, IRELAND | K2: 4922 > __+__ > > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.7 (Darwin) > Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org > > iD8DBQFHUxrDyJCeYjZnfkQRAkvbAJ9iHe9PVXg1HCZoxVzRWLCs+1x3ywCfRguC > 1JTrn0xszgOQi8f7RslQwLY= > =WKQo > -----END PGP SIGNATURE----- > > _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
