Hello the list, Sorry for the misunderstanding and the pass band used without necessities ! It was not about the bouncing back but the msg concerned my K2
Up to this morning, this K2 was a nice and good worker, with during the last six month about a thousand QSO under his belt ! But this morning turning it on, I just got a vigorous howl ( very low freq nois !). I turn it off, and on after a few second. The Rx start normaly and the noise start again after a few second. Re-turn off and tunr on and no howl and Rx is working correctly! The set was in CW mode so I turn down power (to abt 2/3 watts) and close the key... The result is correct on 1.8, 3.5, 7.0 but nil on the rest of the bands. Closing the key a little longer on 7.0 the rig goes to curent overange in abt 10/12 second and power fall down to zero. So power off, open the rig, remove the bottom cover and before removing the heat sink just check the resistance of driver and PA. On Q6 (driver) E to Gnd 1.3 ohm, B to Gnd 76/80 ohms, and C to Gnd > 500 ohms. On Pa C to Gnd > 600 ohms, B to Gnd 120/130 ohm E to Gnd 0 (it's normal!). They seems to be normals but any time I close the key I get High Cur after 5/6 seconds and power out ZERO !! I do not know what to do, so I will wait till tomorow and hope to get some indications from the list ! Thanks in advance guy, BCNU 72 Bob/F5UL _______________________________________________ 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
