Don, Thanks for all help. I have measured on q5,q6,q7 when it been resting over night and when it is warm and the difference is smal.
q5 base cold )7,9 varm 7,9 q6 base 1,04 emitter 0,28 varm base 1,03 emitter 031 caculeted gives Ic 200mA Pdissipation 2,8W q7 cold bas 0,658 varm 0,647 All in ssb with no modulation. I looked with he scope on the base of q5,q6,q7 on the3.8 MHz signal in tuning and on q5 I have a nice sinuswave but on q6 it lookslike a sampled digital sinuswave a sinus stairway. On q7 base the positiv side hase roud sinuswave form but the negativ side is like a saw vawe sharp edge. Maybe the scope loads the signal down I do not no the cap. of the probe but guess it is about 16pF. The strange thing is way there is almost no distotion when it been resting over the night but comes in after a couple of minutes transmitting. I put it out in the cold for a while but the distortion was still there even if it was cold so it do not looks like it is the temp more like a old care battery that almost empty but will get back a little power resting a night even if you do not charge it. I have replaced the electrolytic caps on the ksb2 board but can there be bad caps on the controlboard that effects transmitt but maybe receive just a little? I been thinking if there is a problem with the bfo or vco it should effect Rx as mutch as Tx. 73 Mike sm3xgm -- Sent from: http://elecraft.365791.n2.nabble.com/ ______________________________________________________________ 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]
